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TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 2.25-mhz 600-ma step-down converters check for samples: TPS62260-q1 , tps62261-q1 , tps62262-q1 , tps62263-q1 1 features 2 ? qualified for automotive applications ? soft start ? high-efficiency step-down converter ? voltage positioning at light loads ? output current up to 600 ma ? available in a small 2 2 0,8-mm son package ? wide v in range from 2-v to 6-v for li-ion ? allows < 1-mm solution height batteries with extended voltage range applications ? 2.25-mhz fixed frequency operation ? pdas, pocket pcs ? power save mode at light load currents ? low power dsp supply ? output voltage accuracy in pwm mode 1.5% ? portable media players ? 15- a (typ) quiescent current ? pol applications ? 100% duty cycle for lowest dropout description the tps6226x devices are high-efficiency synchronous step-down dc-dc converters optimized for battery powered applications. it provides up to 600-ma output current from a single li-ion cell and is ideal to power mobile phones and other portable applications. with an wide input voltage range of 2 v to 6 v, the device supports applications powered by li-ion batteries with extended voltage range, two and three cell alkaline batteries, 3.3-v and 5-v input voltage rails. the tps6226x operates at 2.25-mhz fixed switching frequency and enters power save mode operation at light load currents to maintain high efficiency over the entire load current range. the power save mode is optimized for low output voltage ripple. for low noise applications, the device can be forced into fixed frequency pwm mode by pulling the mode pin high. in the shutdown mode, the current consumption is reduced to less than 1 a. tps6226x allows the use of small inductors and capacitors to achieve a small solution size. the tps6226x is available in a very small 2 2mm 6-pin son package. 1 please be aware that an important notice concerning availability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 powerpad is a trademark of texas instruments. production data information is current as of publication date. copyright ? 2009 ? 2012, texas instruments incorporated products conform to specifications per the terms of the texas instruments standard warranty. production processing does not necessarily include testing of all parameters. 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 1000 i - output current - ma o efficiency - % v = 2.3 v in v = 2.7 v in v = 3 v in v = 3.6 v in v = 4.5 v in v = 1.8 v, mode = gnd, l = 2.2 h, dcr 110 mr out m v in gnd en fb sw TPS62260drv l r 1 r 2 c 10 f out m v out mode c 4.7 f in m 2.2 h m c22 pf 1 v = 2v to 6v in up to 600ma
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com this integrated circuit can be damaged by esd. texas instruments recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ordering information (1) output t a package (2) orderable part number top-side marking voltage ? 40 c to 85 c adjustable TPS62260idrvrq1 oeo 1.8 v tps62261tdrvrq1 ofe ? 40 c to 105 c 1.2 v son ? drv reel of 3000 tps62262tdrvrq1 off 2.5 v tps62263tdrvrq1 ofg ? 40 c to 105 c adjustable TPS62260tdrvrq1 oeo (1) for the most current package and ordering information, see the package option addendum at the end of this document, or see the ti web site at www.ti.com . (2) package drawings, thermal data, and symbolization are available at www.ti.com/packaging . absolute maximum ratings (1) over operating free-air temperature range (unless otherwise noted) input voltage range (2) ? 0.3 v to 7 v voltage range at en, mode ? 0.3 v to v in +0.3 v, 7 v voltage on sw ? 0.3 v to 7 v peak output current internally limited hbm, human-body model 2000 v esd rating (3) cdm, charged-device model 1000 v mm, machine model 200 v t j operating junction temperature ? 40 c to 125 c t stg storage temperature range ? 65 c to 150 c (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) all voltage values are with respect to network ground terminal. (3) the human body model is a 100-pf capacitor discharged through a 1.5-k ? resistor into each pin. the machine model is a 200-pf capacitor discharged directly into each pin. dissipation ratings package r ja power rating for t a 25 c derating factor above t a = 25 c drv 76 c/w 1300 mw 13 mw/ c recommended operating conditions min nom max unit v in supply voltage 2 6 v output voltage range for adjustable voltage 0.6 vin v t a operating ambient temperature TPS62260idrvrq1 ? 40 85 c tps6226xtdrvrq1 -40 105 t j operating junction temperature ? 40 125 c 2 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 electrical characteristics over full operating ambient temperature range, typical values are at t a = 25 c. unless otherwise noted, specifications apply for condition v in = en = 3.6v. external components c in = 4.7 f 0603, c out = 10 f 0603, l = 2.2 h, see the parameter measurement information. parameter test conditions min typ max unit supply v in input voltage range 2.3 6 v v in 2.5 v to 6 v 600 i out output current (1) v in 2.3 v to 2.5 v 300 ma v in 2 v to 2.3 v 150 i out = 0 ma, pfm mode enabled (mode = gnd), 15 device not switching a i out = 0 ma, pfm mode (2) enabled (mode = gnd), i q operating quiescent current 18.5 device switching, v out = 1.8 v i out = 0 ma, switching with no load (mode = v in ), 3.8 ma pwm operation, v out = 1.8 v, v in = 3 v t a = 25 c 0.1 1 i sd shutdown current en = gnd a t a = 105 c 2.5 falling 1.85 uvlo undervoltage lockout threshold v rising 1.95 enable, mode v ih high level input voltage, en, mode 2 v v in 6 v 1 vin v v il low level input voltage, en, mode 2 v v in 6 v 0 0.4 v i in input bias current, en, mode en, mode = gnd or vin 0.01 1 a power switch high-side mosfet on-resistance 240 480 r ds(on) v in = v gs = 3.6 v, t a = 25 c m ? low-side mosfet on-resistance 185 380 forward current limit mosfet, high i limf v in = v gs = 3.6 v, t a = 25 c 0.8 1 1.3 a side and low side thermal shutdown increasing junction temperature 140 t sd c thermal shutdown hysteresis decreasing junction temperature 20 oscillator f sw oscillator frequency 2 v v in 6 v 2 2.25 2.5 mhz output v out adjustable output voltage range 0.6 v in v v ref reference voltage 600 mv mode = v in , pwm operation, feedback voltage pwm mode for fixed output voltage versions v fb = v out , ? 1.5% 0% 1.5% 2.5 v v in 6 v, 0 ma i out 600 ma (3) v fb mode = gnd, device in pfm mode, feedback voltage pfm mode 1% voltage positioning active (2) load regulation pwm mode -0.5 %/a t start up start-up time time from active en to reach 95% of v out nominal 500 s t ramp v out ramp-up time time to ramp from 5% to 95% of v out 250 s i lkg leakage current into sw pin v in = 3.6 v, v in = v out = v sw , en = gnd (4) 0.1 1 a (1) not production tested (2) in pfm mode, the internal reference voltage is set to typ. 1.01 v ref . see the parameter measurement information. (3) for v in = v o + 0.6 v (4) in fixed output voltage versions, the internal resistor divider network is disconnected from fb pin. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 3 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com pin assignments terminal functions terminal i/o description name no. this is the switch pin and is connected to the internal mosfet switches. connect the external inductor sw 1 out between this terminal and the output capacitor. this pin is only available at son package option. mode pin = high forces the device to operate in fixed mode 2 i frequency pwm mode. mode pin = low enables the power save mode with automatic transition from pfm mode to fixed frequency pwm mode. feedback for the internal regulation loop. connect the external resistor divider to this pin. in case of fb 3 i fixed output voltage option, connect this pin directly to the output capacitor. this is the enable pin of the device. pulling this pin to low forces the device into shutdown mode. pulling en 4 i this pin to high enables the device. this pin must be terminated. v in 5 pwr power supply gnd 6 pwr ground functional block diagram 4 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 zero-pole amp. integrator error amplifier +1% voltage positioning pwm comp. vref control stage gate driver anti- shoot-through current-limit comparator current-limit comparator vref +1% fb fb v in gnd mode 2.25-mhz oscillator sw1 en v in softstart vout ramp control thermal shutdown .6 reference 0 v vref undervoltage lockout 1.8 v limithigh side limitlow side sawtooth generator int. resistor network fb ri3 ri 1 ri..n mode only in 2x2son gnd pfm comparator drv package (top view) mode fb gnd sw en vin 1 23 6 54 exposed thermal pad
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 parameter measurement information copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 5 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v in gnd en fb sw TPS62260dvr r 1 r 2 v out mode c 4.7 f in m l 2.2 h m c22 pf 1 c 10 f out m l: lps3015 2.2 h, 110 m c grm188r60j475k 4.7 f murata 0603 size c m w m in out grm188r60j106m 10 f murata 0603 size m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com typical characteristics table 1. table of graphs figure output current v out = 1.8 v, power save mode, mode = gnd figure 1 output current v out = 1.8 v, pwm mode, mode = v in figure 2 output current v out = 3.3 v, pwm mode, mode = v in figure 3 efficiency output current v out = 3.3 v, power save mode, mode = gnd figure 4 output current figure 5 output current figure 6 at 25 c, v out = 1.8 v, power save mode, mode = gnd figure 7 at ? 40 c, v out = 1.8 v, power save mode, mode = gnd figure 8 at 85 c, v out = 1.8 v, power save mode, mode = gnd figure 9 output voltage accuracy at 25 c, v out = 1.8 v, pwm mode, mode = v in figure 10 at ? 40 c, v out = 1.8 v, pwm mode, mode = v in figure 11 at 85 c, v out = 1.8 v, pwm mode, mode = v in figure 12 typical operation pwm mode, v out = 1.8 v figure 13 mode pin transition from pfm to forced pwm mode at light load figure 14 mode transition mode pin transition from forced pwm to pfm mode at light load figure 15 start-up timing figure 16 forced pwm mode , v out = 1.5 v, 50 ma to 200 ma figure 17 forced pwm mode , v out = 1.5 v, 200 ma to 400 ma figure 18 pfm mode to pwm mode, v out = 1.5 v, 150 a to 400 ma figure 19 pwm mode to pfm mode, v out = 1.5 v, 400 ma to 150 a figure 20 load transient pfm mode, v out = 1.5 v, 1.5 ma to 50 ma figure 21 pfm mode, v out = 1.5 v, 50 ma to 1.5 ma figure 22 pfm mode to pwm mode, v out = 1.8 v, 50 ma to 250 ma figure 23 pfm mode to pwm mode, v out = 1.5 v, 50 ma to 400 ma figure 24 pwm mode to pfm mode, v out = 1.5 v, 400 ma to 50 ma figure 25 pfm mode, v out = 1.8 v, 50 ma figure 26 line transient pfm mode, v out = 1.8 v, 250 ma figure 27 pfm v out ripple, v out = 1.8 v, 10 ma, l = 2.2 h, c out = 10 f figure 28 typical operation pfm v out ripple, v out = 1.8 v, 10 ma, l = 4.7 h, c out = 10 f figure 29 shutdown current into vin vs input voltage, (t a = 85 c, t a = 25 c, t a = -40 c) figure 30 quiescent current vs input voltage, (t a = 85 c, t a = 25 c, t a = -40 c) figure 31 static drain source on-state figure 32 vs input voltage, (t a = 85 c, t a = 25 c, t a = -40 c) resistance figure 33 efficiency (power save mode) efficiency (pwm mode) vs vs output current output current figure 1. figure 2. 6 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 0 10 20 30 40 50 60 70 80 90 100 0.01 0.1 1 10 100 1000 i - output current - ma o efficiency - % v = 1.8 v mode = gnd l = 2.2 h dcr 110 mr out m 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 i - output current - ma o h - efficiency - % v = 2.3 v in v = 2.7 v in v = 3 v in v = 3.6 v in v = 4.5 v in v = 1.8 v, mode = v , l = 2.2 h out in m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 efficiency (pwm mode) efficiency (power save mode) vs vs output current output current figure 3. figure 4. efficiency efficiency vs vs output current output current figure 5. figure 6. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 7 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 0 10 20 30 40 50 60 70 80 90 0.01 0.1 1 10 100 1000 i C output current C ma out h C efficiency C % 100 v = 4.2 v in v = 4.5 v in v = 3.6 v in v = 3.3 v mode = gnd l = 2.2 h dcr = 110 mh c = 10 f 0603 out out m m v = 5 v in 0 10 20 30 40 50 60 70 80 90 100 1 10 100 1000 i C output current C ma out v = 3.3 v mode = v l = 2.2 h dcr 110 m c = 10 f 0603 out in out m w m h C efficiency C % v = 3.6 v in v = 4.2 v in v = 4.5 v in v = 5 v in i ? output current ? ma o 0 10 20 30 40 90 100 0.01 0.1 100 1000 efficiency ? % 50 60 v = 2.3 v i v = 2.7 v i v = 3.6 v i v = 4.5 v i v = 1.2 v mode = gnd l = 2 h mipsa2520 c = 10 f 0603 o o m m 70 80 10 1 i ? output current ? ma o 0 10 20 30 40 90 100 1 10 100 1000 efficiency ? % 50 60 v = 2.3 v i v = 2.3 v i v = 2.7 v i v = 3.6 v i v = 4.5 v i v = 1.2 v, mode = v , l = 2 h, mipsa2520 c = 10 f 0603 o i o m m 70 80
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com output voltage accuracy output voltage accuracy (power save mode) vs vs output current output current figure 7. figure 8. output voltage accuracy (power save mode) output voltage accuracy (pwm mode) vs vs output current output current figure 9. figure 10. 8 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 1.74 1.76 1.78 1.8 1.82 1.84 1.86 1.88 v C output voltage dc C v o 0.01 0.1 1 10 100 1000 i C output current C ma o t = 85 c v = 1.8 v mode = gnd l = 2.2 h c = 10 f a out o m m 1.746 1.764 1.782 1.8 1.818 1.836 1.854 v - output voltage dc - v o 0.01 0.1 1 10 100 1000 i - output current - ma o v = 2.3 v in v = 2.7 v v = 3 v v = 3.6 v v = 4.5 v in in in in t = 25c, v = 1.8 v, mode = v , l = 2.2 h a out in m 1.74 1.76 1.78 1.8 1.82 1.84 1.86 1.88 pfm mode, voltage positioning v C output voltage dc C v o 0.01 0.1 1 10 100 1000 i C output current C ma o t = 25c v = 1.8 v mode = gnd l = 2.2 h c = 10 f a out o m m 1.74 1.76 1.78 1.8 1.82 1.84 1.86 1.88 v C output voltage dc C v o 0.01 0.1 1 10 100 1000 i C output current C ma o t = C40 c v = 1.8 v mode = gnd l = 2.2 h c = 10 f a out o m m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 output voltage accuracy (pwm mode) output voltage accuracy (pwm mode) vs vs output current output current figure 11. figure 12. mode pin transition from pfm typical operation (pwm mode) to forced pwm mode at light load figure 13. figure 14. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 9 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 time base - 1 s/div m mode2v/div sw2v/div i200ma/div coil v = 3.6 v v = 1.8 v i = 10 ma in out out pfm mode forced pwm mode time base - 10 s/div m v 3.6v v 1.8v, i 150ma l 2.2 h, c 10 f 0603 in out out out m m v 10 mv/div out sw 2 v/div i coil 200 ma/div 1.746 1.764 1.782 1.8 1.818 1.836 1.854 v - output voltage dc - v o 0.01 0.1 1 10 100 1000 i - output current - ma o v = 2 v in v = 2.7 v v = 3 v v = 3.6 v v = 4.5 v in in in in t = -40c, v = 1.8 v, mode = v , l = 2.2 h a out in m 1.746 1.764 1.782 1.8 1.818 1.836 1.854 v - output voltage dc - v o 0.01 0.1 1 10 100 1000 i - output current - ma o v = 2.3 v in v = 2.7 v v = 3 v v = 3.6 v v = 4.5 v in in in in t = 85c, v = 1.8 v, mode = v , l = 2.2 h a out in m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com mode pin transition from pwm to pfm mode at light load start-up timing figure 15. figure 16. load transient load transient (forced pwm mode) (forced pwm mode) figure 17. figure 18. 10 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 time base - 20 s/div m i 200 ma/div out v 50 mv/div out i coil 500 ma/div 200 ma 400 ma v 3.6 v v 1.5 v i 200 ma to 400 ma in out out time base - 2.5 s/div m mode2 v/div sw2 v/div i coil 200 ma/div v = 3.6 v v = 1.8 v i = 10 ma in out out pfm mode forced pwm mode en2v/div sw2v/div v 2v/div out i 100ma/div in v =3.6v r =10 v =1.8v i intoc mode=gnd in load out in in timebase-100 s/div m time base - 20 s/div m v 3.6 v v 1.5 v i 50 ma to 200 ma mode = in out out v in i 200 ma/div out v 50 mv/div out i coil 500 ma/div
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 load transient load transient (forced pfm mode to pwm mode) (forced pwm mode to pfm mode) figure 19. figure 20. load transient (pfm mode) load transient (pfm mode) figure 21. figure 22. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 11 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v 3.6 v v 1.5 v i mode = gnd in out out 1.5 ma to 50 ma v 50 mv/div out i coil 500 ma/div time base 50C s/div m sw 2 v/div i 50 ma/div out 1.5 ma 50 ma v 3.6 v v 1.5 v i 50 ma to mode = gnd in out out 1.5ma v 50mv/div out i 500 ma/div coil time base 50C s/div m sw 2 v/div i 50 ma/div out 1.5 ma 50 ma v 3.6 v v 1.5 v i 150 a to 400 ma mode = gnd in out out m v 50 mv/div out i 500 ma/div coil time base 500 C s/div m sw 2 v/div i 500 ma/div out 150 a m 400 ma vv i in out out 3.6 v 1.5 v 150 a to 400 ma mode = gnd m v out 50mv/div i coil l 500ma/div time base 500 C s/div m sw 2 v/div i out 500 ma/div 150 a m 400 ma
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com load transient load transient (pfm mode to pwm mode) (pfm mode to pwm mode) figure 23. figure 24. load transient (pwm mode to pfm mode) line transient (pfm mode) figure 25. figure 26. 12 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v 3.6 v v 1.5 v i 50 mode = gnd in out out ma to 400 ma v 50 mv/div out i 500 ma/div coil time base 20C s/div m sw 2 v/div i 500 ma/div out 50 ma 400 ma pfm mode pwm mode v in 3.6v to 4.2v 500 mv/div v = 1.8 v 50 mv/div i = 50 ma mode = gnd out out v 3.6 v v 1.8 v i 50 mode = gnd in out out ma to 250 ma v 50 mv/div out i 500 ma/div coil time base 20C s/div m sw 2 v/div i 200 ma/div out 50 ma 250 ma v 3.6 v v 1.5 v i 50 mode = gnd in out out ma to 400 ma v 50 mv/div out i 500ma/div coil time base 20C s/div m sw 2 v/div i 500 ma/div out 50 ma 400 ma pfm mode pwm mode
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 line transient (pwm mode) typical operation (pfm mode) figure 27. figure 28. shutdown current into vin vs typical operation (pfm mode) input voltage figure 29. figure 30. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 13 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v ? input voltage ? v in 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 2 2.5 3 3.5 4 4.5 5 5.5 6 i - shutdown current into vin ? a sd m t = 85 c a o t = -40 c a o en = gnd t = 25 c a o v 3.6 v; v 1.8 v, i 10 mode = gnd in out out ma, l = 4.7 h, c = 10 f 0603, m m out v 20 mv/div out i 200 ma/div coil time base 2C s/div m sw 2 v/div v 3.6v to 4.2v 500 mv/div in v = 1.8 v 50 mv/div i = 250 ma mode = vin out out time base C 100 s/div m time base C 10 s/div m v 20 mv/div out sw 2 v/div i 200 ma/div coil
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com quiescent current static drain-source on-state resistance vs vs input voltage input voltage figure 31. figure 32. static drain-source on-state resistance vs input voltage figure 33. 14 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v ? input voltage ? v in 0 0.05 0.1 0.15 0.2 0.35 0.4 2 2.5 3 3.5 4 4.5 5 r - static drain-source on-state resistance ? ds(on) w t = 85 c a o t = -40 c a o low side switching t = 25 c a o 0.25 0.3 v ? input voltage ? v in 8 10 12 14 16 18 20 22 2.5 3 3.5 4 4.5 5 5.5 6 i - quiescent current ? a q m t = 85 c a o t = -40 c a o mode = gnd,en = vin, device not switching t = 25 c a o mode = gnden = vin device not switching t = 85 c a t = 25 c a t = C40 c a v C input voltage C v in 2 2.5 3 3.5 4 4.5 5 5.5 6 8 10 12 14 16 18 20 i C quiescent current C a q m v ? input voltage ? v in 0 0.1 0.2 0.3 0.4 0.7 0.8 2 2.5 3 3.5 4 4.5 5 r - static drain-source on-state resistance ? ds(on) w t = 85 c a o t = -40 c a o high side switching t = 25 c a o 0.5 0.6
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 detailed description operation the tps6226x step down converter operates with typically 2.25 mhz fixed frequency pulse width modulation (pwm) at moderate to heavy load currents. at light load currents the converter can automatically enter power save mode and operates then in pfm mode. during pwm operation the converter use a unique fast response voltage mode control scheme with input voltage feed-forward to achieve good line and load regulation allowing the use of small ceramic input and output capacitors. at the beginning of each clock cycle initiated by the clock signal, the high side mosfet switch is turned on. the current flows now from the input capacitor via the high side mosfet switch through the inductor to the output capacitor and load. during this phase, the current ramps up until the pwm comparator trips and the control logic will turn off the switch. the current limit comparator will also turn off the switch in case the current limit of the high side mosfet switch is exceeded. after a dead time preventing shoot through current, the low side mosfet rectifier is turned on and the inductor current will ramp down. the current flows now from the inductor to the output capacitor and to the load. it returns back to the inductor through the low side mosfet rectifier. the next cycle will be initiated by the clock signal again turning off the low side mosfet rectifier and turning on the on the high side mosfet switch. power save mode the power save mode is enabled with mode pin set to low level. if the load current decreases, the converter will enter power save mode operation automatically. during power save mode the converter skips switching and operates with reduced frequency in pfm mode with a minimum quiescent current to maintain high efficiency. the converter will position the output voltage typically +1% above the nominal output voltage. this voltage positioning feature minimizes voltage drops caused by a sudden load step. the transition from pwm mode to pfm mode occurs once the inductor current in the low side mosfet switch becomes zero, which indicates discontinuous conduction mode. during the power save mode the output voltage is monitored with a pfm comparator. as the output voltage falls below the pfm comparator threshold of v out nominal +1%, the device starts a pfm current pulse. the high side mosfet switch will turn on, and the inductor current ramps up. after the on-time expires, the switch is turned off and the low side mosfet switch is turned on until the inductor current becomes zero. the converter effectively delivers a current to the output capacitor and the load. if the load is below the delivered current, the output voltage will rise. if the output voltage is equal or higher than the pfm comparator threshold, the device stops switching and enters a sleep mode with typical 15 a current consumption. if the output voltage is still below the pfm comparator threshold, a sequence of further pfm current pulses are generated until the pfm comparator threshold is reached. the converter starts switching again once the output voltage drops below the pfm comparator threshold. with a fast single threshold comparator, the output voltage ripple during pfm mode operation can be kept small. the pfm pulse is time controlled, which allows to modify the charge transferred to the output capacitor by the value of the inductor. the resulting pfm output voltage ripple and pfm frequency depend in first order on the size of the output capacitor and the inductor value. increasing output capacitor values and inductor values will minimize the output ripple. the pfm frequency decreases with smaller inductor values and increases with larger values. the pfm mode is left and pwm mode entered in case the output current can not longer be supported in pfm mode. the power save mode can be disabled through the mode pin set to high. the converter will then operate in fixed frequency pwm mode. dynamic voltage positioning this feature reduces the voltage under/overshoots at load steps from light to heavy load and vice versa. it is active in power save mode and regulates the output voltage 1% higher than the nominal value. this provides more headroom for both the voltage drop at a load step, and the voltage increase at a load throw-off. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 15 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com figure 34. power save mode operation with automatic mode transition 100% duty cycle low dropout operation the device starts to enter 100% duty cycle mode once the input voltage comes close to the nominal output voltage. in order to maintain the output voltage, the high side mosfet switch is turned on 100% for one or more cycles. with further decreasing vin the high side mosfet switch is turned on completely. in this case the converter offers a low input-to-output voltage difference. this is particularly useful in battery-powered applications to achieve longest operation time by taking full advantage of the whole battery voltage range. the minimum input voltage to maintain regulation depends on the load current and output voltage, and can be calculated as: v in min = v o max + i o max (r ds(on) max + r l ) with: i o max = maximum output current plus inductor ripple current r ds(on) max = maximum p-channel switch rdson. r l = dc resistance of the inductor v o max = nominal output voltage plus maximum output voltage tolerance undervoltage lockout the undervoltage lockout circuit prevents the device from malfunctioning at low input voltages and from excessive discharge of the battery and disables the output stage of the converter. the undervoltage lockout threshold is typically 1.85v with falling v in . mode selection the mode pin allows mode selection between forced pwm mode and power save mode. connecting this pin to gnd enables the power save mode with automatic transition between pwm and pfm mode. pulling the mode pin high forces the converter to operate in fixed frequency pwm mode even at light load currents. this allows simple filtering of the switching frequency for noise sensitive applications. in this mode, the efficiency is lower compared to the power save mode during light loads. the condition of the mode pin can be changed during operation and allows efficient power management by adjusting the operation mode of the converter to the specific system requirements. 16 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 output voltage vout (pwm) vout +1% pfm comparator threshold voltage positioning light loadpfm mode moderate to heavy loadpwm mode
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 enable the device is enabled setting en pin to high. during the start up time t start up the internal circuits are settled and the soft start circuit is activated. the en input can be used to control power sequencing in a system with various dc/dc converters. the en pin can be connected to the output of another converter, to drive the en pin high and getting a sequencing of supply rails. with en = gnd, the device enters shutdown mode in which all internal circuits are disabled. in fixed output voltage versions, the internal resistor divider network is then disconnected from fb pin. soft start the tps6226x has an internal soft start circuit that controls the ramp up of the output voltage. the output voltage ramps up from 5% to 95% of its nominal value within typical 250 s. this limits the inrush current in the converter during ramp up and prevents possible input voltage drops when a battery or high impedance power source is used. the soft start circuit is enabled within the start up time t start up . short-circuit protection the high side and low side mosfet switches are short-circuit protected with maximum switch current = i limf . the current in the switches is monitored by current limit comparators. once the current in the high side mosfet switch exceeds the threshold of it's current limit comparator, it turns off and the low side mosfet switch is activated to ramp down the current in the inductor and high side mosfet switch. the high side mosfet switch can only turn on again, once the current in the low side mosfet switch has decreased below the threshold of its current limit comparator. thermal shutdown as soon as the junction temperature, t j , exceeds 140 c (typical) the device goes into thermal shutdown. in this mode, the high side and low side mosfets are turned-off. the device continues its operation when the junction temperature falls below the thermal shutdown hysteresis. copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 17 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com application information figure 35. fixed 1.2-v output figure 36. adjustable 1.2-v output figure 37. adjustable 1.5-v output 18 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v in gnd en fb sw r2 360k r1 540k mode v =2vto6v in c 4.7 f in m TPS62260drv l1 2.2 h m c122pf c 10 f out m v 1.5v upto600ma out v in gnd en fb sw mode c 4.7 f in m l 2.2 h 1 m r 360 k 1 w r 360 k 2 w c22 pf 1 c 10 f out m v 1.2 v out TPS62260drv v in gnd en fb sw l1 2.2 h m mode v = 2 v to 6 v in tps62262drv v 1.2 v up to 600 ma out c 4.7 f in m c 10 f out m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 figure 38. fixed 1.8-v output copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 19 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v in gnd en fb sw l1 2.2 h m mode v = 2 v to 6 v in tps62261drv v 1.8 v up to 600 ma out c 4.7 f in m c 10 f out m
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com output voltage setting the output voltage can be calculated to: with an internal reference voltage v ref typical 0.6v. to minimize the current through the feedback divider network, r 2 should be 180 k ? or 360 k ? . the sum of r 1 and r 2 should not exceed ~1m ? , to keep the network robust against noise. an external feed forward capacitor c 1 is required for optimum load transient response. the value of c 1 should be in the range between 22pf and 33pf. route the fb line away from noise sources, such as the inductor or the sw line. output filter design (inductor and output capacitor) the tps6226x is designed to operate with inductors in the range of 1.5 h to 4.7 h and with output capacitors in the range of 4.7 f to 22 f. the part is optimized for operation with a 2.2 h inductor and 10 f output capacitor. larger or smaller inductor values can be used to optimize the performance of the device for specific operation conditions. for stable operation, the l and c values of the output filter may not fall below 1 h effective inductance and 3.5 f effective capacitance. inductor selection the inductor value has a direct effect on the ripple current. the selected inductor has to be rated for its dc resistance and saturation current. the inductor ripple current ( i l ) decreases with higher inductance and increases with higher v i or v o . the inductor selection has also impact on the output voltage ripple in pfm mode. higher inductor values will lead to lower output voltage ripple and higher pfm frequency, lower inductor values will lead to a higher output voltage ripple but lower pfm frequency. equation 1 calculates the maximum inductor current in pwm mode under static load conditions. the saturation current of the inductor should be rated higher than the maximum inductor current as calculated with equation 2 . this is recommended because during heavy load transient the inductor current will rise above the calculated value. (1) (2) with: f = switching frequency (2.25mhz typical) l = inductor value i l = peak to peak inductor ripple current i lmax = maximum inductor current a more conservative approach is to select the inductor current rating just for the switch current limit i limf of the converter. accepting larger values of ripple current allows the use of lower inductance values, but results in higher output voltage ripple, greater core losses, and lower output current capability. the total losses of the coil have a strong impact on the efficiency of the dc/dc conversion and consist of both the losses in the dc resistance (r (dc) ) and the following frequency-dependent components: ? the losses in the core material (magnetic hysteresis loss, especially at high switching frequencies) ? additional losses in the conductor from the skin effect (current displacement at high frequencies) ? magnetic field losses of the neighboring windings (proximity effect) ? radiation losses 20 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 i l max i out max i l 2 i l v out 1 v out v in l f v out v ref 1 r 1 r 2
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 table 2. list of inductors dimensions [mm 3 ] inductance h inductor type supplier 2.5x2.0x1.0max 2.0 mips2520d2r2 fdk 2.5x2.0x1.2max 2.0 mipsa2520d2r2 fdk 2.5x2.0x1.0max 2.2 ksli-252010ag2r2 htachi metals 2.5x2.0x1.2max 2.2 lqm2hpn2r2mj0l murata 3x3x1.5max 2.2 lps3015 2r2 coilcraft output capacitor selection the advanced fast-response voltage mode control scheme of the tps6226x allows the use of tiny ceramic capacitors. ceramic capacitors with low esr values have the lowest output voltage ripple and are recommended. the output capacitor requires either an x7r or x5r dielectric. y5v and z5u dielectric capacitors, aside from their wide variation in capacitance over temperature, become resistive at high frequencies. at nominal load current, the device operates in pwm mode and the rms ripple current is calculated as: (3) at nominal load current, the device operates in pwm mode and the overall output voltage ripple is the sum of the voltage spike caused by the output capacitor esr plus the voltage ripple caused by charging and discharging the output capacitor: (4) at light load currents, the converter operates in power save mode and the output voltage ripple is dependent on the output capacitor and inductor value. larger output capacitor and inductor values minimize the voltage ripple in pfm mode and tighten dc output accuracy in pfm mode. input capacitor selection an input capacitor is required for best input voltage filtering, and minimizing the interference with other circuits caused by high input voltage spikes. for most applications, a 4.7 f to 10 f ceramic capacitor is recommended. because ceramic capacitor loses up to 80% of its initial capacitance at 5 v, it is recommended that 10 f input capacitors be used for input voltages > 4.5v. the input capacitor can be increased without any limit for better input voltage filtering. take care when using only small ceramic input capacitors. when a ceramic capacitor is used at the input and the power is being supplied through long wires, such as from a wall adapter, a load step at the output or vin step on the input can induce ringing at the vin pin. this ringing can couple to the output and be mistaken as loop instability or could even damage the part by exceeding the maximum ratings. table 3. list of capacitors capacitance type size supplier 4.7 f grm188r60j475k 0603 1.6x0.8x0.8mm 3 murata 10 f grm188r60j106m69d 0603 1.6x0.8x0.8mm 3 murata copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 21 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 v out v out 1 v out v in l f 1 8 cout f esr i rmsc out v out 1 v out v in l f 1 2 3
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com layout considerations figure 39. suggested layout for fixed output voltage options figure 40. suggested layout for adjustable output voltage version 22 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1 gnd c out c in v out v in u l gnd r1 r2 c1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 www.ti.com slvsa16c ? august 2009 ? revised july 2012 as for all switching power supplies, the layout is an important step in the design. proper function of the device demands careful attention to pcb layout. care must be taken in board layout to get the specified performance. if the layout is not carefully done, the regulator could show poor line and/or load regulation, stability issues as well as emi problems. it is critical to provide a low inductance, impedance ground path. therefore, use wide and short traces for the main current paths. the input capacitor should be placed as close as possible to the ic pins as well as the inductor and output capacitor. connect the gnd pin of the device to the powerpad ? land of the pcb and use this pad as a star point. use a common power gnd node and a different node for the signal gnd to minimize the effects of ground noise. connect these ground nodes together to the powerpad land (star point) underneath the ic. keep the common path to the gnd pin, which returns the small signal components and the high current of the output capacitors as short as possible to avoid ground noise. the fb line should be connected right to the output capacitor and routed away from noisy components and traces (e.g., sw line). copyright ? 2009 ? 2012, texas instruments incorporated submit documentation feedback 23 product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
TPS62260-q1 , tps62261-q1 tps62262-q1 , tps62263-q1 slvsa16c ? august 2009 ? revised july 2012 www.ti.com revision history changes from revision b (february, 2011) to revision c page ? added extra row in ordering information table. ..................................................................................................................... 2 24 submit documentation feedback copyright ? 2009 ? 2012, texas instruments incorporated product folder link(s): TPS62260-q1 tps62261-q1 tps62262-q1 tps62263-q1
package option addendum www.ti.com 2-jun-2016 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples TPS62260idrvrq1 active wson drv 6 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 85 oeo TPS62260tddcrq1 active sot ddc 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 105 sjz TPS62260tdrvrq1 active wson drv 6 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 105 oeo tps62261tdrvrq1 active wson drv 6 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 105 ofe tps62262tdrvrq1 active wson drv 6 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 105 off tps62263tdrvrq1 active wson drv 6 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 105 ofg (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device.
package option addendum www.ti.com 2-jun-2016 addendum-page 2 (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. other qualified versions of TPS62260-q1, tps62261-q1, tps62262-q1, tps62263-q1 : ? catalog: TPS62260 , tps62261 , tps62262 , tps62263 note: qualified version definitions: ? catalog - ti's standard catalog product
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant TPS62260idrvrq1 wson drv 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 TPS62260tddcrq1 sot ddc 5 3000 179.0 8.4 3.2 3.2 1.4 4.0 8.0 q3 TPS62260tdrvrq1 wson drv 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62261tdrvrq1 wson drv 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62262tdrvrq1 wson drv 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 tps62263tdrvrq1 wson drv 6 3000 179.0 8.4 2.2 2.2 1.2 4.0 8.0 q2 package materials information www.ti.com 2-jun-2016 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) TPS62260idrvrq1 wson drv 6 3000 195.0 200.0 45.0 TPS62260tddcrq1 sot ddc 5 3000 195.0 200.0 45.0 TPS62260tdrvrq1 wson drv 6 3000 195.0 200.0 45.0 tps62261tdrvrq1 wson drv 6 3000 195.0 200.0 45.0 tps62262tdrvrq1 wson drv 6 3000 195.0 200.0 45.0 tps62263tdrvrq1 wson drv 6 3000 195.0 200.0 45.0 package materials information www.ti.com 2-jun-2016 pack materials-page 2

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