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tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 1 post office box 655303 ? dallas, texas 75265 controlled baseline ? one assembly/test site, one fabrication site extended temperature performance of ?55 c to 125 c enhanced diminishing manufacturing sources (dms) support enhanced product change notification qualification pedigree ? open drain power-on reset with 200-ms delay 500-ma low-dropout voltage regulator available in 1.5-v, 1.6-v, 1.8-v, 2.5-v, 3.3-v fixed output and adjustable versions dropout voltage to 169 mv (typ) at 500 ma (tps77533) ? component qua lification in accordance with jedec and industry standards to ensure reliable operation over an extended temperature range. this includes, but is not limited to, highly accelerated stress test (hast) or biased 85/85, temperature cycle, autoclave or unbiased hast, electromigration, bond intermetallic life, and mold compound life. such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. ultralow 85 a typical quiescent current fast transient response 2% tolerance over specified conditions for fixed-output versions 20-pin tssop powerpad ? (pwp) package thermal shutdown protection description the tps775xx devices are designed to have a fast transient response and be stable with a 10- f low esr capacitors. this combination provides high performance at a reasonable cost. because the pmos device behaves as a low-value resistor, the dropout voltage is very low (typically 169 mv at an output current of 500 ma for the tps77533) and is directly proportional to the output current. additionally, since the pmos pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 85 a over the full range of output current, 0 ma to 500 ma). these two key specifications yield a significant improvement in operating life for battery-powered systems. this ldo family also features a sleep mode; applying a ttl high signal to en (enable) shuts down the regulator, reducing the quiescent current to 1 a at t j = 25 c. the reset output of the tps775xx initiates a reset in microcomputer and microprocessor systems in the event of an undervoltage condition. an internal comparator in the tps775xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. the tps775xx is offered in 1.5-v , 1.6-v, 1.8-v, 2.5-v, and 3.3-v fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 v to 5.5 v for tps77501 option. output voltage tolerance is specified as a maximum of 2% over line, load, and temperature ranges. the tps775xx family is available in 20 pin tssop package. copyright ? 2010, texas instruments incorporated production data information is current as of publication date. products conform to specifications per the terms of texas instruments standard warranty. production processing does not necessarily include testing of all parameters. please be aware that an important notice concerning avail ability, standard warranty, and use in critical applications of texas instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. powerpad is a trademark of texas instruments. nc ? no internal connection 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 gnd/hsink gnd/hsink gnd nc en in in nc gnd/hsink gnd/hsink gnd/hsink gnd/hsink nc nc reset fb/nc out out gnd/hsink gnd/hsink pwp package (top view)
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 2 post office box 655303 ? dallas, texas 75265 t ? time ? s tps77x33 load transient response i ? output current ? ma o v o ? change in output voltage ? mv 500 0 0 50 ?50 c o = 2x47 f esr = 1/2x100 m v o = 3.3 v v i = 4.3 v 060 40 20 80 100 140 120 160 180 200 t a ? free-air temperature ? c ?40 0 20 120 10 3 ?60 40 60 80 100 ? dropout voltage ? mv v do tps77x33 dropout voltage vs free-air temperature 10 2 10 1 10 0 10 ?1 10 ?2 ?20 140 i o = 10 ma i o = 0 ma c o = 10 f i o = 500 ma ordering information ? t a output voltage (v typ) package orderable part number top-side marking 3.3 tssop ? pw tape and reel tps77533mpwprep 77533me 2.5 tssop ? pw tape and reel tps77525mpwprep 77525me 1.8 tssop ? pw tape and reel tps77518mpwprep 77518me ?55 c to 125 c 1.6 tssop ? pw tape and reel tps77516mpwprep 77516me 1.5 tssop ? pw tape and reel tps77515mpwprep 77515me adjustable ? 1.5 v to 5.5 v tssop ? pw tape and reel tps77501mpwprep 77501me ? package drawings, standard packing quantities, thermal data, symbolization, and pcb design guidelines are available at www.ti.com/sc/package. ? the tps77501 is programmable using an external resistor divider (see application information). tps77516 is product preview.
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 3 post office box 655303 ? dallas, texas 75265 ? see application information section for capacitor selection details. reset out out 7 6 5 in in en gnd 3 16 14 13 v i 0.1 f reset v o 10 f + c o ? figure 1. typical application configuration for fixed output options functional block diagram?adjustable version 200 ms delay (for reset option) _ + v ref = 1.183 v out fb/nc en gnd reset _ + in external to the device r1 r2
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 4 post office box 655303 ? dallas, texas 75265 functional block diagram?fixed-voltage version _ + v ref = 1.183 v out en gnd r1 r2 reset _ + in 200 ms delay (for reset option) terminal functions tssop package terminal i/o description name no. i/o description en 5 i enable input fb/nc 15 i feedback input voltage for adjustable device (no connect for fixed options) gnd 3 regulator ground gnd/hsink 1, 2, 9, 10, 11, 12, 19, 20 ground/heatsink in 6, 7 i input voltage nc 4, 8, 17, 18 no connect out 13, 14 o regulated output voltage reset 16 o reset output
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 5 post office box 655303 ? dallas, texas 75265 reset timing diagram ? v res is the minimum input voltage for a valid reset . the symbol v res is not currently listed within eia or jedec standards for semiconductor symbology. ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? v i v res ? t t t v o threshold voltage reset output 200 ms delay 200 ms delay output undefined output undefined v it + ? v it ? ? v it ? ? v it + ? less than 5% of the output voltage ? v it ?trip voltage is typically 5% lower than the output voltage (95%v o ) v it? to v it+ is the hysteresis voltage. v res ?
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 6 post office box 655303 ? dallas, texas 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) ? input voltage range ? , v i ?0.3 v to 13.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . voltage range at en ?0.3 v to 16.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum reset voltage 16.5 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . peak output current internally limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . output voltage, v o (out, fb) 7 v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous total power dissipation see dissipation rating tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum junction temperature, t j 125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . thermal impedance, junction to ambient , ja 32.63 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . thermal impedance, junction to currentt , jc 1.4 c/w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ?65 c to 150 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . esd rating, hbm 2 kv . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ? stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated under ?recommended operating conditi ons? is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. ? all voltage values are with respect to network terminal ground. package thermal impedance is calculated in accordance with jesd 51-5. electromigration fail mode wirebond voiding fail mode estimated lifetime in years 1000 100 10 115 120 125 130 135 140 continous t j - junction temperature - c tps77501mpwp-ep estimated lifetime at elevated temperatures electromigration and wirebond voiding fail modes 1 145 150 recommended operating conditions min max unit input voltage, v i # 2.7 10 v output voltage range, v o 1.5 5.5 v output current, i o (see note 1) 0 500 ma operating virtual junction temperature, t j (see note 1) ?55 125 c # to calculate the minimum input voltage for your maximum output current, use the following equation: v i(min) = v o(max) + v do(max load) . note 1: continuous current and operating junction temperature are limited by internal protection circuitry, but it is not recomm ended that the device operate under conditions beyond those specified in this table for extended periods of time.
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 7 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating free-air temperature range, v i = v o(typ) + 1 v, i o = 1 ma, en = 0 v, c o = 10 f (unless otherwise noted) parameter test conditions min typ max unit tps77501 1.5 v v o 5.5 v, t j = 25 c v o tps77501 1.5 v v o 5.5 v, t j = ?55 c to 125 c 0.98v o 1.02v o v tps77515 t j = 25 c, 2.7 v < v in < 10 v 1.5 v tps77515 t j = ?55 c to 125 c, 2.7 v < v in < 10 v 1.470 1.530 tps77516 t j = 25 c, 2.7 v < v in < 10 v 1.6 v output volta g e (10 c to 125 c, 2.7 v < v in < 10 v 1.568 1.632 v output voltage (10 a to 500 ma load) (see note 2) tps77518 t j = 25 c, 2.8 v < v in < 10 v 1.8 tps77518 t j = ?55 c to 125 c, 2.8 v < v in < 10 v 1.764 1.836 tps77525 t j = 25 c, 3.5 v < v in < 10 v 2.5 v tps77525 t j = ?55 c to 125 c, 3.5 v < v in < 10 v 2.450 2.550 v tps77533 t j = 25 c, 4.3 v < v in < 10 v 3.3 tps77533 t j = ?55 c to 125 c, 4.3 v < v in < 10 v 3.234 3.366 quiescent current (gnd current) 10 a < i o < 500 ma, t j = 25 c 85 a quiescent current (gnd current) en = 0v, (see note 2) i o = 500 ma, t j = ?55 c to 125 c 125 a output voltage line regulation ( v o /v o ) (see notes 2 and 3) v o + 1 v < v i 10 v, t j = 25 c 0.01 %/v load regulation 3 mv output noise voltage (tps77518) bw = 200 hz to 100 khz, i c = 500 ma c o = 10 f, t j = 25 c 53 vrms output current limit v o = 0 v 1.7 2.4 a thermal shutdown junction temperature 150 c en = v i ,t j = 25 c, 2.7 v < v i < 10 v 1 a standby current en = v i ,t j = ?55 c to 125 c 2.7 v < v i < 10 v 10 a fb input current tps77501 fb = 1.5 v 2 na high level enable input voltage 1.7 v low level enable input voltage 0.9 v power supply ripple rejection (see note 2) f = 1 khz, c o = 10 f, t j = 25 c 60 db notes: 2. minimum in operating voltage is 2.7 v or v o(typ) + 1 v, whichever is greater. maximum in voltage 10v. 3. if v o 1.8 v then v imin = 2.7 v, v imax = 10 v: line reg. (mv) % v v o v imax 2.7 v 100 1000 if v o 2.5 v then v imin = v o + 1 v, v imax = 10 v: line reg. (mv) % v v o v imax v o 1v 100 1000
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 8 post office box 655303 ? dallas, texas 75265 electrical characteristics over recommended operating free-air temperature range, v i = v o(typ) + 1 v, i o = 1 ma, en = 0 v, c o = 10 f (unless otherwise noted) (continued) parameter test conditions min typ max unit minimum input voltage for valid reset i o(reset) = 300 a 1.1 v trip threshold voltage v o decreasing 92 98 %v o reset hysteresis voltage measured at v o 0.5 %v o reset output low voltage v i = 2.7 v, i o(reset) = 1ma 0.15 0.4 v leakage current v (reset) = 5 v 1 a reset time-out delay 200 ms input current (en ) en = 0 v ?1 0 1 a input current (en ) en = v i ?1 1 a dropout voltage (see note 4) tps77533 i o = 500 ma, t j = 25 c 169 mv dropout voltage (see note 4) tps77533 i o = 500 ma, t j = ?55 c to 125 c 287 mv note 4: in voltage equals v o (typ) ? 100 mv; tps77515, tps77516, tps77518, and tps77525 dropout voltage limited by input voltage range limitations (i.e., tps77533 input voltage needs to drop to 3.2 v for purpose of this test). ty pical characteristics table of graphs figure v output voltage vs output current 2, 3, 4 v o output voltage vs free-air temperature 5, 6, 7 ground current vs free-air temperature 8 power supply ripple rejection vs frequency 9 output spectral noise density vs frequency 10 z o output impedance vs frequency 11 v dropout voltage vs input voltage 12 v do dropout voltage vs free-air temperature 13 input voltage (min) vs output voltage 14 line transient response 15, 17 load transient response 16, 18 v o output voltage vs time 19 equivalent series resistance (esr) vs output current 21 ? 24
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 9 post office box 655303 ? dallas, texas 75265 typical characteristics figure 2 i o ? output current ? a tps77x33 output voltage vs output current 3.2830 3.2815 3.2800 0.1 0.3 3.2825 3.2820 3.2810 0.2 3.2835 0 ? output voltage ? v v o 3.2805 0.4 0.5 v i = 4.3 v t a = 25 c figure 3 i o ? output current ? a 1.4975 1.4960 1.4950 1.4970 1.4965 1.4955 1.4985 ? output voltage ? v v o tps77x15 output voltage vs output current 1.4980 0.1 0.3 0.2 0 0.4 0.5 v i = 2.7 v t a = 25 c figure 4 i o ? output current ? a tps77x25 output voltage vs output current 2.4955 2.4940 2.4920 0.1 0.3 2.4950 2.4945 2.4935 0.2 0.4 2.4960 0 0.5 ? output voltage ? v v o v i = 3.5 v t a = 25 c 2.4930 2.4925 figure 5 t a ? free-air temperature ? c tps77x33 output voltage vs free-air temperature ? output voltage ? v v o 3.31 3.28 3.25 ?40 0 3.30 3.29 3.27 ?20 100 140 3.32 ?60 120 3.26 20 40 60 80 v i = 4.3 v i o = 500 ma i o = 1 ma
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 10 post office box 655303 ? dallas, texas 75265 typical characteristics figure 6 t a ? free-air temperature ? c tps77x15 output voltage vs free-air temperature ? output voltage ? v v o 1.515 1.500 1.485 ?40 0 1.510 1.505 1.495 ?20 100 ?60 120 1.490 20 40 60 80 v i = 2.7 v i o = 500 ma i o = 1 ma 140 figure 7 t a ? free-air temperature ? c tps77x25 output voltage vs free-air temperature ? output voltage ? v v o ?40 0 ?20 100 ?60 120 20 40 60 80 2.515 2.500 2.480 2.510 2.505 2.495 2.490 2.485 v i = 3.5 v i o = 500 ma i o = 1 ma figure 8 t a ? free-air temperature ? c tps77xxx ground current vs free-air temperature ground current ? a ?40 0 ?20 100 ?60 120 20 40 60 80 140 v i = 2.7 v 100 95 90 85 80 75 i o = 1 ma i o = 500 ma figure 9 psrr ? power supply ripple rejection ? db f ? frequency ? hz power supply ripple rejection vs frequency 70 60 50 40 30 20 10 0 ?10 tps77x33 90 80 10 1 v i = 4.3 v c o = 10 f t a = 25 c 10 2 10 3 10 4 10 5 10 6
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 11 post office box 655303 ? dallas, texas 75265 typical characteristics figure 10 tps77x33 output spectral noise density vs frequency f ? frequency ? hz 10 2 10 3 10 4 10 5 10 ?5 10 ?6 10 ?8 10 ?7 i o = 7 ma i o = 500 ma v i = 4.3 v c o = 10 f t a = 25 c v hz output spectral noise density ? figure 11 f ? frequency ? khz ? output impedance ? z o 10 1 10 2 10 5 10 6 10 0 10 ?1 10 ?2 10 4 10 3 i o = 1 ma i o = 500 ma v i = 4.3 v c o = 10 f t a = 25 c tps77x33 output impedance vs frequency figure 12 v i ? input voltage ? v 300 150 0 34 250 200 100 3.5 2.5 ? dropout voltage ? mv 50 4.5 5 v do 350 t a = 125 c t a = ?40 c t a = 25 c i o = 500 ma tps77x01 dropout voltage vs input voltage figure 13 t a ? free-air temperature ? c ?40 0 20 120 10 3 ?60 40 60 80 100 ? dropout voltage ? mv v do tps77x33 dropout voltage vs free-air temperature 10 2 10 1 10 0 10 ?1 10 ?2 ?20 140 i o = 500 ma i o = 10 ma i o = 0 ma c o = 10 f
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 12 post office box 655303 ? dallas, texas 75265 typical characteristics figure 14 3 2.7 2 1.5 1.75 2 2.25 2.5 2.75 ? input voltage (min) ? v input voltage (min) vs output voltage 4 3 3.25 3.5 v i v o ? output voltage ? v i o = 0.5 a t a = ?40 c t a = 25 c t a = 125 c v o ? change in 10 0 3.7 2.7 tps77x15 line transient response v i t ? time ? s 060 40 20 80 100 140 120 160 180 200 ? input voltage ? v output voltage ? mv c o = 10 f t a = 25 c ?10 figure 15 figure 16 t ? time ? s tps77x15 load transient response i ? output current ? ma o v o ? change in output voltage ? mv c o = 2x47 f esr = 1/2x100 m v o = 1.5 v v in = 2.7 v 500 0 060 40 20 80 100 140 120 160 180 200 0 50 ?50 tps77x33 line transient response t ? time ? s v o ? change in v i ? input voltage ? v output voltage ? mv 5.3 60 40 20 80 100 140 120 160 180 200 c o = 10 f t a = 25 c 0 4.3 10 0 ?10 figure 17
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 13 post office box 655303 ? dallas, texas 75265 typical characteristics t ? time ? s tps77x33 load transient response i ? output current ? ma o v o ? change in output voltage ? mv 500 0 60 40 20 80 100 140 120 160 180 200 0 0 50 ?50 c o = 2x47 f esr = 1/2x100 m v o = 3.3 v v i = 4.3 v figure 18 figure 19 t ? time ? ms tps77x33 output voltage vs time (at startup) 3 2 0.3 0.2 0.1 0.4 0.5 0.7 0.6 0.8 0.9 1 0 v o ? output voltage ? v 0 1 4 enable pulse ? v c o = 10 f i o = 500 ma t a = 25 c in en out + gnd c o esr r v i to load r l figure 20. test circuit for typical regions of stability (figures 21 through 24) (fixed output options)
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 14 post office box 655303 ? dallas, texas 75265 typical characteristics esr ? equivalent series resistance ? figure 21 0.1 0 100 200 300 400 500 typical region of stability equivalent series resistance ? vs output current 10 i o ? output current ? ma 1 v o = 3.3 v c o = 4.7 f v i = 4.3 v t a = 25 c region of stability region of instability figure 22 typical region of stability equivalent series resistance ? vs output current i o ? output current ? ma esr ? equivalent series resistance ? 0.1 0 100 200 300 400 500 10 1 v o = 3.3 v c o = 4.7 f v i = 4.3 v t j = 125 c region of stability region of instability esr ? equivalent series resistance ? figure 23 0.1 0 100 200 300 400 500 typical region of stability equivalent series resistance ? vs output current 10 i o ? output current ? ma 1 region of instability region of stability v o = 3.3 v c o = 22 f v i = 4.3 v t a = 25 c esr ? equivalent series resistance ? figure 24 typical region of stability equivalent series resistance ? vs output current 0.1 0 100 200 300 400 500 10 1 i o ? output current ? ma region of stability region of instability v o = 3.3 v c o = 22 f v i = 4.3 v t j = 125 c ? equivalent series resistance (esr) refers to the total series resistance, including the esr of the capacitor, any series resist ance added externally, and pwb trace resistance to c o .
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 15 post office box 655303 ? dallas, texas 75265 application information the tps775xx family includes five fixed-output voltage regulators (1.5 v, 1.6 v, 1.8 v, 2.5 v, and 3.3 v), and an adjustable regulator, the tps77501 (adjustable from 1.5 v to 5.5 v). device operation the tps775xx feature very low quiescent current, which remains virtually constant even with varying loads. conventional ldo regulators use a pnp pass element, the base current of which is directly proportional to the load current through the regulator (i b = i c / ). the tps775xx use a pmos transistor to pass current; because the gate of the pmos is voltage driven, operating current is low and invariable over the full load range. another pitfall associated with the pnp-pass element is its tendency to saturate when the device goes into dropout. the resulting drop in forces an increase in i b to maintain the load. during power up, this translates to large start-up currents. systems with limited supply current may fail to start up. in battery-powered systems, it means rapid battery discharge when the voltage decays below the minimum required for regulation. the tps775xx quiescent currents remain low even when the regulator drops out, eliminating both problems. the tps775xx family also features a shutdown mode that places the output in the high-impedance state (essentially equal to the feedback-divider resistance) and reduces quiescent current to 2 a. if the shutdown feature is not used, en should be tied to ground. minimum load requirements the tps775xx family is stable even at zero load; no minimum load is required for operation. fb?pin connection (adjustable version only) the fb pin is an input pin to sense the output voltage and close the l oop for the adjustable option . the output voltage is sensed through a resistor divider network to close the loop as it is shown in figure 26. normally, this connection should be as short as possible; however, the connection can be made near a critical circuit to improve performance at that point. internally, fb connects to a high-impedance wide-bandwidth amplifier and noise pickup feeds through to the regulator output. routing the fb connection to minimize/avoid noise pickup is essential. external capacitor requirements an input capacitor is not usually required; however, a ceramic bypass capacitor (0.047 f or larger) improves load transient response and noise rejection if the tps775xx is located more than a few inches from the power supply. a higher-capacitance electrolytic capacitor may be necessary if large (hundreds of milliamps) load transients with fast rise times are anticipated. like all low dropout regulators, the tps775xx require an output capacitor connected between out and gnd to stabilize the internal control loop. the minimum recommended capacitance value is 10 f and the esr (equivalent series resistance) must be between 50 m and 1.5 . capacitor values 10 f or larger are acceptable, provided the esr is less than 1.5 . solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided they meet the requirements described previously.
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? m arch 2003 ? revised june 2010 16 post office box 655303 ? dallas, texas 75265 application information external capacitor requirements (continued) reset out out 7 6 5 in in en gnd 3 16 14 13 v i c1 0.1 f reset v o 10 f + c o 250 k figure 25. typical application circuit (fixed versions) programming the tps77501 adjustable ldo regulator the output voltage of the tps77501 adjustable regulator is programmed using an external resistor divider as shown in figure 26. the output voltage is calculated using: v o v ref 1 r1 r2 (1) where: v ref = 1.1834 v typ (the internal reference voltage) resistors r1 and r2 should be chosen for approximately 10- a divider current. lower value resistors can be used but offer no inherent advantage and waste more power. higher values should be avoided as leakage currents at fb increase the output voltage error. the recommended design procedure is to choose r2 = 110 k to set the divider current at approximately 10 a and then calculate r1 using: r1 v o v ref 1 r2 (2) output voltage r1 r2 2.5 v 3.3 v 3.6 v 4.75 v unit 121 196 226 332 110 110 110 110 k k k k output voltage programming guide v o v i reset out fb / nc r1 r2 gnd en in 0.9 v 1.7 v tps77501 reset output 0.1 f 250 k c o figure 26. tps77501 adjustable ldo regulator programming
tps77501-ep, tps77515-ep, tps77516-ep, tps77518-ep tps77525-ep, tps77533-ep with reset output fast-transient-response 500-ma low-dropout voltage regulators sgls010b ? march 2003 ? revised june 2010 17 post office box 655303 ? dallas, texas 75265 application information reset indicator the tps775xx features a reset output that can be used to monitor the status of the regulator. the internal comparator m onitors the output voltage: when the output drops to between 92% and 98% of its nominal regulated value, the reset output transistor turns on, taking the signal low. the open-drain output requires a pullup resistor. if not used, it can be left floating. reset can be used to drive power-on reset circuitry or as a low-battery indicator. reset does not assert itself when the regulated output voltage falls outside the specified 2% tolerance, but instead reports an output voltage low relative to its nominal regulated value (refer to timing diagram for start-up sequence). regulator protection the tps775xx pmos-pass transistors have a built-in back diode that conducts reverse currents when the input voltage drops below the output voltage (e.g., during power down). current is conducted from the output to the input and is not internally limited. when extended reverse voltage is anticipated, external limiting may be appropriate. the tps775xx also feature internal current limiting and thermal protection. during normal operation, the tps775xx limit output current to approximately 1.7 a. when current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. while current limiting is designed to prevent gross device failure, care should be taken not to exceed the power dissipation ratings of the package. if the temperature of the device exceeds 150 c(typ), thermal-protection circuitry shuts it down. once the device has cooled below 130 c(typ), regulator operation resumes. power dissipation and junction temperature specified regulator operation is assured to a junction temperature of 125 c; the maximum junction temperature should be restricted to 125 c under normal operating conditions. this restriction limits the power dissipation the regulator can handle in any given application. to ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, p d(max) , and the actual dissipation, p d , which must be less than or equal to p d(max) . the maximum-power-dissipation limit is determined using the following equation: p d(max) t j max t a r ja where: t j max is the maximum allowable junction temperature. t a is the ambient temperature. r ja is the thermal resistance junction-to-ambient for the package, i.e., 32.6 c/w for the 20-terminal pwp with no airflow. the regulator dissipation is calculated using: p d v i v o i o power dissipation resulting from quiescent current is negligible. excessive power dissipation will trigger the thermal protection circuit.
package option addendum www.ti.com 31-may-2014 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 tps77501mpwprep active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77501me tps77501mpwprepg4 active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77501me tps77515mpwprep active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77515me tps77518mpwprep active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77518me tps77525mpwprep active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77525me tps77533mpwprep active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77533me v62/03631-01xe active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77501me v62/03631-02xe active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77515me v62/03631-04xe active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77518me v62/03631-05xe active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77525me v62/03631-06xe active htssop pwp 20 2000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -55 to 125 77533me (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.
package option addendum www.ti.com 31-may-2014 addendum-page 2 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. (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 tps77501-ep, tps77515-ep, tps77518-ep, tps77525-ep, tps77533-ep : ? catalog: tps77501 , tps77515 , tps77518 , tps77525 , tps77533 ? automotive: TPS77501-Q1 , tps77515-q1 , tps77518-q1 , tps77525-q1 , tps77533-q1 note: qualified version definitions: ? catalog - ti's standard catalog product ? automotive - q100 devices qualified for high-reliability automotive applications targeting zero defects
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 tps77501mpwprep htssop pwp 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 tps77515mpwprep htssop pwp 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 tps77518mpwprep htssop pwp 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 tps77525mpwprep htssop pwp 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 tps77533mpwprep htssop pwp 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 q1 package materials information www.ti.com 14-jul-2012 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) tps77501mpwprep htssop pwp 20 2000 367.0 367.0 38.0 tps77515mpwprep htssop pwp 20 2000 367.0 367.0 38.0 tps77518mpwprep htssop pwp 20 2000 367.0 367.0 38.0 tps77525mpwprep htssop pwp 20 2000 367.0 367.0 38.0 tps77533mpwprep htssop pwp 20 2000 367.0 367.0 38.0 package materials information www.ti.com 14-jul-2012 pack materials-page 2

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