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MP3416 step - up converter with low i q , 1.1a switching current, output disco nnect and battery detection feature MP3416 rev. 1.0 www.monolithicpower.com 1 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. description the mp 3416 is a low quiescent current , step - up converter that uses peak - current control and variable frequency architecture to regulate the output voltage . the MP3416 can work with an input voltage as low as 0.86 vto provide an output vol tage f rom 1.8v to 5 .5 v. the MP3416 works in peak - current - control mode and provides good transient response . the integrated p - channel synchronous rectifier improves efficiency and eliminates the need for an external schottky diode. in light - load condition, the peak current decline s to about 350ma , and the device enters pulse - skip mode to save power loss. when the MP3416 shuts down, the output is disconnected from the inpu t, allowing the output to draw less than 0.65 a in shutdown mode. the MP3416 is available in 8 - pin t sot23 and 8 - pin qfn (1.5mmx2.0mm) packages . features ? input voltage range : 0. 86 v to 5.5 v ? start - up voltage range :1.2 5 v to 5.5v ? output voltage range : 1.8v to 5.5v ? 9.5 a q uiescent current ? < 650n a s hutdown current ? up to 80% efficiency at 100a - 200a light - load condition ? output disconnect in shutdown ? down mode when v in > v out ? adjustable low battery detection ? internal s ynchronous r ectifier ? over - temperature protection (otp) wi th t hermal s hutdown at 1 5 5c ? available in tsot23 - 8 and qfn - 8 (1.5mmx2.0mm) package s applications ? medical devices ? digital retail d isplay s ? gaming c ontroller s ? remote c ontrol lers ? battery - powered products ? handheld computers and smart phones all mps parts are l ead - free , halogen - free, and adhere to the rohs directive. for mps green status, please visit the mps website under quality assurance . mps and the future of analog ic technology are registered trademarks of monolithic power systems, inc. typical application l 1 o u t s w g n d e n v o u t , 3 . 3 v c 1 v i n m p 3 4 1 6 3 . 3 h 1 0 f 2 2 f c 2 i n l b i l b o f b r 1 1 m r 2 1 7 8 k r 4 r 5 1 0 0 k 3 4 8 k
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 2 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. ordering information part number package top marking MP3416gj * t sot23 - 8 see below MP3416gqh ** qfn - 8 (1.5mmx2.0mm) see below * for tape & reel, add suffix C z(e.g. MP3416gj C z) ** for tape & reel, add suffix C z(e.g. MP3416gqh C z) top marking (MP3416gj) aht: product code of MP3416gj y: year code top marking (MP3416g qh ) fk : product code of MP3416g qh ll:lot number package reference top view top view tsot23 - 8 qfn - 8 (1.5mmx2.0mm)
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 3 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. absolute maximum rat ings (1) sw ...................... - 0.3v to+ 6.5 v (8.5v for <5ns) all other pins ............................... - 0.3v to +6.5v continuous power dissipa tion (t a = + 25 c) ( 2 ) t sot23 - 8 ................................ ..................... 1.25w qfn - 8 ................................ ...................... 1.14w junction temperature ............................... 150 c lead temperature ................................ .... 260 c storage temperature ................ - 65c to +150c recommended operating conditions ( 3 ) start - up voltage ( v st ) .................... 1.2 5 v to 5.5 v operation voltage ( v in ) ................. 0.86 v to 5.5 v v out ................................ ............... 1.8 v t o 5.5v operating junction temp . (t j ). ... - 40 c to +125 c thermal resistance ( 4 ) ja jc tsot23 - 8 ............................ 100 ...... 55 ... c/w qfn - 8 (1.5mmx2.0mm) ....... 110 ...... 55 ... c/w notes : 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junct ion temperature t j (max), t he junction - to - ambient thermal resistance ja , and the ambient temperature t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max) - t a )/ ja . exceeding the maximum all owable power dissipation produces an excessive die temperature, causing the regulator to go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function o utside of its operating conditions. 4) measured on jesd51 - 7, 4 - layer pcb.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 4 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. electrical character istics v in = v en =1.8v, v out = 3.3v, t j = - 40c to +125c , typical value is tested at t j = +25c. the limit over temperature is guaranteed by characterization unless otherwise noted. parameters symbol condition min typ max units input voltage minimum start - up voltage v st r load =1000, t j =25 c 1.1 1.2 5 v operating input voltage v in 0. 86 5.5 v v in off under - voltage lockout v uvlo v in falling 0. 7 0. 86 v output volt age feedback voltage v fb t j =25 c 494 504 514 mv t j = - 40c to 125c 491 504 517 mv feedback input current i fb v fb =0.55v 10 70 na operation current quiescent current i q v en =v in = 1.8 v, v out =3.3v, no load , m easured on in 0.65 1.1 a v en =v in = 1.8 v, v out =3.3v, no load , m easured on out 9.5 12 a shutdown current i sd v en =v out =0v, measured on in 360 6 5 0 na switch mosfet nmos on - resistance r n_on 1 00 m? pmos on - resistance r p_on 8 00 m? nmos current limit i sw_limit t j =25 c , duty =50% 900 11 00 13 0 0 ma t j = - 40c to 125c , duty =50% 7 9 0 1100 14 1 0 ma nmos max on period t on _ max 10 s en control en input high level v en _ h 0.7 v en input low le vel v en_l 0. 2 v en input current i en connect to v in 1 00 na lbi detection low battery threshold v lbi falling edge 0.4 v lbi hysteresis v lbi - hys 70 mv lbi input leakage current i lbi connect to v in 100 na lbo low voltage level v lbo i lbo =1m a 20 50 mv lbo input leakage current i lbo connect to v out , lbo logic high 100 na thermal protection thermal shutdown (5) 1 55 c thermal s hutdown hysteresis (5) 20 c note : 5) guaranteed by characterization, not production tested.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 5 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical charac teristics v in = 1.8v, v out = 3.3v, l = 3.3h, t a = 25c, unless otherwise noted.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 6 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical characterist ics (continued) v in = 1.8v, v out = 3.3v, l =3.3h, t a = 25c, unless otherwise noted.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 7 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical performance characteristics v in = 1.8v, v o ut = 3.3v, l =3.3h, t a = 25c, unless otherwise noted.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 8 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical performance characteristics (continued) v in = 1.8v, v out = 3.3v, l =3.3h, t a = 25c, unless otherwise noted.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 9 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typical performance characteristics (continued) v in = 1.8v, v out = 3.3v, l =3.3h, t a = 25c, unless otherwise noted. note : 6) tested under a 0.79a switching current limit. the test schematic is the same as figure 5 when vout is 3.3v and the same as figure 6 when vout is 5v.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 10 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. pin functions pin # tsot23 - 8 pin # qfn - 8 name description 1 8 fb feedback input for the error amplifier . connect the resistor divider tap to fb . 2 7 gnd ground . gnd is the reference ground of the regulated output voltage. 3 6 sw output switch node. connect the inductor to sw to complete the step - up converter. 4 5 out output node. out is the source of the internal synchronous rectifier. place the output capacitor between ou t and gnd. 5 4 in input supply. in requires a bypass capacitor. 6 3 en enable input. en turns the regulator on or off. logic high (>0.7v) turns on the regulator ; logic low(<0.2v) turns off the regulator. it is not recommended to leave e n float ing . 7 2 lbi low battery detection input. do not leave lbi floating. connect lbi to vin through a resistor divider to detect a low battery condition. the divided lbi voltage should be higher than 0.2v during application . pull lb i up to v in if the lbi function is not used. 8 1 lbo low battery detection output . the output of lbo is an open - drain signal. lbo requires a pull - up resistor to a dc voltage to indicate high if the in put voltage is higher than the threshold of the low ba ttery detection voltage. lbo maintains a high impedance when the ic is off.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 11 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. block diagram figure 1 : functional block diagram o u t g n d d i s c o n n e c t i o n l s d r i v e r a n d c o n t r o l l o g i c + - g n d s w i n l b i c u r r e n t s e n s e t o n - m a x t h e r m a l f b h s - r e f e a c u r r e n t l i m i t s s c o m p a r a t o r e n l b o + e n a b l e c o n t r o l u n d e r - v o l t a g e l o c k o u t e n a b l e + - 0 . 4 v g n d l c i n c o u t r 1 r 2 r 3 r 4
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 12 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. operation the MP3416 is a peak - currentmode, step - up con verter in a compact tsot23 - 8 or qfn - 8 package with true output disconnect. the MP3416 can operate at input voltages as low as 0.86v and features peak current and boundary conduction mode (bcm) control for exceptional line and load r egulation. internal soft start and loop compensation simplify the design process and minimize external components. the internal low r ds(on) mosfets combined with power - save m ode (psm) operation enable the device to maintain high efficiency over a wide current load range. pwm operation the MP3416 utilizes a peak - currentcontrol scheme. the output voltage is monitored by fb , which is connected to the internal error amplifier (ea) . the error amplifier compares the feedback voltage and reference voltage , and the ea output voltage controls the peak - inductor current . at the beginning of each cycle, the low - side mosfet (ls - fet) turns on , the inductor current rises up to the peak current which is decided by t he ea output, and then the ls - fet turns off , and the high - side mosfet (hs - fet) turns on. the inductor current charge s the output capacitor while the hs - fet is on. after the inductor current reduces to zero, the ls - fet initia tes one new cycle to raise the inductor current. in light load, the ea output drop s and limit s the peak inductor current at about 350ma . if the ea output voltage continues decreas ing due to a high v out , the ls - fet lock s and does not turn on again until th e ea output rise s up to a 350ma peak inductor current. this allows the device to work in psm smoothly to achieve high efficiency in light - load condition. while the load current increases, the peak inductor current incre ase s and transfer s more energy to the output. down mode ( v in > v out ) the MP3416 integrate s one disconnection mosfet (dis - fet) for down - mode condition. when v in is lower than v out - 0.2v, the dis - fet is on and does not differ from a normal converter s operation . while v in rises higher, the gate of the dis - fet is connected to a voltage level of v in - 0.4v. in this condition, the sw voltage is charged high by the inductor current .the dis - fet no longer acts as a low - impeda nce path , but only turn s on when the sw voltage is charged high by the inductor current. if the inductor current is zero, the sw voltage is equal to v in , so the dis - fet does not turn on. in shutdown, the ls - fet never turns on to setup the inductor current, so the dis - fet can disconnect the output terminal from the input to prevent battery discharge. start - up there are three steps for start - up. firstly , after the input voltage rises up to the minimum start - up voltage, the MP3416 ent ers open - loop work mode. in this mode, the switching on time is constant, and the output voltage is charged high by increasing the switching frequency. when v out rises to about 1.7v, the MP3416 switches to close - loop work mode with soft - st art control. in this second stage, the inductor peak current is controlled by the internal comp voltage (v comp ) , and the minimum peak current is not limited, so the switching frequency may be high , and the rising output voltage has a very small voltage ripple. finally , when the output voltage is close to its set value, the MP3416 enters bcm close - loop mode, while the minimum peak inductor current is limited above 350ma . due to the 350ma minimum peak c urrent, the MP3416 may enter pulse - skip mode in steady state if the load is light. t he loop is powered by the input before v out rises up to 1.7v . it is then powered by the output after v out is higher than 1.7v . enable control (en) the d evice operates when en is high (>0.7v) . in shutdown mode with a low en voltage, the regulator stops switching and halts all internal control circuitry , and the dis - fet turns off as well . t his isolates the load from the input, so the outpu t voltage can drop below the input voltage during shutdown.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 13 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. current limit the MP3416 uses current limit to prevent an inductor current runaway. if the inductor current trigger sthe current limit, the ls - fet is turn ed off immediately. when the load current increase s , the inductor current trigger sthe limit level and limits the output energy. to prevent the ls - fet from running away, the max turn on time is limited to 10s. short - circuit and over l oad protection unlike mos t step - up converters, the MP3416 allows for short circuits on the output . in the event of a short circuit, the MP3416 enters hiccup protection. during an overload, v out may drop to about 1.6v . if the load continues increa sing , the MP3416 enter s hiccup protection . if overload is defined as v out higher than 1.6v but still smaller than v in +0.2v, the MP3416 treat s this as down mode operation with current limit. the internal t emperature of the MP3416 may rise , causing the device to enter otp. low battery detection the MP3416 includes one lbi pin to detect the battery voltage , andthe function is active only when the device is enabled. lbi is connected to v in through the externalresistor divider . if the lbi voltage is lower than 0. 4 v, lbo goes low to indicate the power failure. during application , the lbi voltage should always be higher than 0.2v ; otherwise , the lbo function may indicat e falsely . thermal protection the device has a n internal temperature monitor. if the die temperature exceeds 1 55 c, the part stop working and re start s when the die temperature drops below 1 35 c.
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 14 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. application informat ion setting the output voltage the external resistor divider sets the output voltage (see the typical application schematic on page 1). the feedback resistor ( r 1 ) must account for both stability and dynamic response and should therefore be chose n careful ly . choose r 1 , and then calculate r 2 with equation (1) : (1) where v fb =0.504v. the feedback circuit is shown in figure 2 . figure 2 : feedback network table 1 lis ts the recommended resistor values for common output voltage s . table 1: resistor values for common output voltages v out (v) r 1 ( k ) r 2 ( k ) 1.8 1000 383 3 1000 200 3.3 1000 178 5 1000 113 input capacitor selection low esr input capacitors reduce input switching noise and peak current drawn from the battery. ceramic capacitors are recommended for input d ecoupling and should be located as close to the device as possible . a ceramic capacitor 10 f or larger is recommended to restrain the v in ripple. inductor selection the MP3416 can apply small surface - mount ed chip inductors due to the 1.1a peak current. because of the peak current and boundary conduction mode (bcm) control method, the values of the inductance affect the switching frequency. a larger inductance cause s lower switching frequency and increases o utput ripple . a smaller inductance cause s higher switching frequency and decreases efficiency. considering the efficiency and output ripple, a 1.5h to 3.3h inductor is recommend ed for most application s . the inductor should have a low dcr to reduce resistive power loss. the saturated current (i sat ) should be large enough to support the peak current. output capacitor selection the ou tput capacitor requires a minimum capacitance value of 22f at the programmed output voltage to ensure stability over the full operating range. a higher capacitance value may be required to lower the output ripple and transient response. low esr c apacitors such as x5r or x7r type ceramic capacitors are recommended. supposing that esr is zero, the minimum output capacitor to support the ripple in the boost mode can be calculated with equation (2) : (2) where v out(max) is the maximum output voltage , v in(min) is the minimum input voltage , i o is the output current , f s(min) is the minimum switching frequency , and ? v is the acceptable output ripple . 1 fb out fb 2 r v v v r ? ? ? v o u t r 1 r 2 f b m p 3 4 1 6 ) min ( s ) max ( out ) min ( in ) max ( out o o f v v ) v v ( i c ? ? ? ? ? ?
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 15 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. pcb layout considerations efficient pcb layout is critical for switching power supplies with a high switching frequency . a poor layout can result in reduced performance, emi problems, resistive loss , and system instability. for best results, refer to figure 3 and figure 4 and follow the guidelines below. 1) place the output capacitor as close to out and gnd as possible . 2) place the input capacitor and inductor close to the ic . 3) keep the sw trace as short and wide as possible . 4) keep the feedback loop far away from noise source s, such as the sw trace . 5) keep the feedback divider resistor as close to fb and gnd as possible . 6) tie the ground return of the input/output capacitor close to gnd with a large gnd copper area. 7) add gnd and vias o n the bottom layer if the top layer gnd connection between cin, cout , and ic - gnd is narrow. figure 3 :recommended tsot23 layout figure 4 : recommended qfn layout design example table 2 is a design example following the application guidelines for the following specifications . table 2: design example v in 1.25v to 5.5 v v out 3.3v i out 0a - 0.1a (7) the typical application circuit for v out = 3.3v in figure 5 shows the detailed application schematic and is the basis for the typical performance waveforms. for mo re detailed device applications, please refer to the related evaluation board datasheets . note : 7) the load capability is higher when v in is relatively high, refer to the maximum output current vs. input voltage curve on page 8 . e n l b i l b o f b g n d s w o u t v i n g n d v o u t g n d i n b o t t o m l a y e r t o p l a y e r c 1 r 1 r 2 l s w c 2 v i n g n d v o u t g n d b o t t o m l a y e r t o p l a y e r r 1 r 2 l s w c 1 c 2 o u t s w g n d f b l b o l b i i n e n
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 16 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. typica l application circuits figure 5 : typ i cal schematic for 3.3 v output figure 6 : typ i cal schematic for 5v output f b g n d s w o u t i n e n l b i l b o m p 3 4 1 6 1 m r 1 1 0 0 k r 6 1 7 8 k r 2 1 0 0 k r 5 1 0 0 k r 3 2 0 0 k r 4 2 2 f c 2 1 0 f c 1 g n d g n d g n d 3 . 3 h l 1 g n d g n d v i n v o u t , 3 . 3 v f b g n d s w o u t i n e n l b i l b o m p 3 4 1 6 1 m r 1 1 0 0 k r 6 1 1 3 k r 2 1 0 0 k r 5 1 0 0 k r 3 2 0 0 k r 4 2 2 f c 2 1 0 f c 1 g n d g n d g n d 3 . 3 h l 1 g n d g n d v i n v o u t , 5 v
MP3416 C 1.1 a switching current , low i q step - up converter MP3416 rev. 1.0 www.monolithicpower.com 17 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. package information tsot23 - 8
MP3416 C 1.1 a switching current , low i q step - up converter notice: the information in this document is subject to change without notice. please contact mps for current specifications. users should warrant and guarantee that third party i ntellectual p roperty r ights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP3416 rev. 1.0 www.monolithicpower.com 18 12/14/2016 mps proprietary information. patent protected. unauthorized photocopy and duplication prohibited. ? 2016 mps. all rights reserved. p ackage information (continued) qfn - 8 (1.5mmx2.0mm) s i d e v i e w b o t t o m v i e w n o t e : 1 ) a l l d i m e n s i o n s a r e i n m i l l i m e t e r s . 2 ) e x p o s e d p a d d l e s i z e d o e s n o t i n c l u d e m o l d f l a s h . 3 ) l e a d c o p l a n a r i t y s h a l l b e 0 . 1 0 m i l l i m e t e r s m a x . 4 ) j e d e c r e f e r e n c e i s m o - 2 2 0 . 5 ) d r a w i n g i s n o t t o s c a l e . p i n 1 i d m a r k i n g t o p v i e w p i n 1 i d i n d e x a r e a r e c o m m e n d e d l a n d p a t t e r n p i n 1 i d 0 . 1 2 5 x 4 5 o t y p 0 . 1 2 5 x 4 5

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