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ht77xxa pfm step-up dc/dc converter selection table part no. output voltage package marking ht7727a 2.7v to92 sot89 sot23 sot23-5 ht77xxa (for to92) ht77xxa (for sot89) 7xxa (for sot23) 7xxa (for sot23-5) ht7730a 3.0v ht7737a 3.7v ht7733a 3.3v HT7750A 5.0v note: xx stands for output voltages. block diagram rev 1.40 1 december 3, 2012 features low start-up voltage: 0.7v (typ.) high efficiency: 85% (typ.) high output voltage accuracy: 2.5% output voltage: 2.7v, 3.0v, 3.3v, 5.0v output current up to 200ma ultra low supply current i dd :5 a (typ.) low ripple and low noise low shutdown current: 0.5 a (typ.) to92, sot89, sot23 and sot23-5 package applications palmtops/pdas portable communicators/smartphones cameras/camcorders battery-powered equipment general description the ht77xxa series is a set of pfm step-up dc/dc converter with high efficiency and low ripple. the series features extremely low start-up voltage and high output voltage accuracy. they require only three external com - ponents to provide a fixed output voltage of 2.7v, 3.0v, 3.3v, 3.7v or 5.0v. cmos technology ensures ultra low supply current and makes them ideal for bat- tery-operated applications powered from one or more cells. the ht77xxa consists of an oscillator, a pfm control circuit, a driver transistor, a reference voltage unit, and a high speed comparator. they employ pulse frequency modulation (pfm) for minimum supply current and rip - ple at light output loading. these devices are available in space saving to92, sot89, sot23 and sot23-5 packages. for sot23-5 package, it also build-in a chip enable function to reduce power consumption during shutdown mode.

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pin assignment pin description pin no. pin name description to92 sot89 sot23 sot23-5 1 ce chip enable pin, high active 2232 vout dc/dc converter output monitoring pin 3 nc no connection 1114gnd ground pin 3325lx switching pin absolute maximum ratings supply voltage ..............................v ss 0.3v to v ss +7v storage temperature ............................ 50 cto125 c operating temperature ........................... 40 cto85 c note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. thermal information symbol parameter package max. unit ja thermal resistance (junction to ambient) (assume no ambient airflow, no heat sink) sot89 300 c/w to92 300 c/w sot23 330 c/w sot23-5 320 c/w p d power dissipation sot89 0.33 w to92 0.33 w sot23 0.3 w sot23-5 0.31 w note: p d is measured at ta= 25 c ht77xxa rev 1.40 2 june 25, 2016
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electrical characteristics v in =v out
0.6; i out =10ma; ta=25 c (unless otherwise specified) symbol parameter test conditions min. typ. max. unit v in input voltage 6v v out output voltage tolerance 2.5 2.5 % v start start-up voltage (fig. 1) v in :0 2v; i out =1ma 0.7 0.9 v v hold minimum hold-on voltage (fig. 1) v in :2 0v; i out =1ma 0.7 v i in no-load input current (fig. 1) i out =0ma 13 26 a i dd supply current (fig. 2) v s =v out +0.5v measured at v out pin 510 a i shdn shutdown current ce=gnd 0.5 1 a v ih ce high threshold 2 v v il ce low threshold 0.4 v i leak lx leakage current (fig. 3) v s =v out +0.5v, v x =6v measured at the lx pin 0.9 a f osc maximum oscillator frequency (fig. 3) v s =v out
0.95, v x =6v measured at lx pin 200 khz d osc oscillator duty cycle (fig. 3) v s =v out
0.95, v x =6v measured at lx pin 65 75 85 % efficiency 85 % note: absolute maximum ratings indicate limits beyond which damage to the device may occur. operating ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. the guaranteed specifications apply only for the test conditions listed. test circuit ht77xxa rev 1.40 3 june 25, 2016 + , % - ' ! ! # ' * . ' / ' ! ! ) / , % -
typical performance characteristics ht77xxa rev 1.40 4 june 25, 2016 2 . 8 0 2 . 7 5 2 . 7 0 2 . 6 5 2 . 6 0 2 . 5 5 2 . 5 0 2 . 4 5 2 . 4 0 2 . 3 5 2 . 3 0 v i n = 1 . 2 v v i n = 1 . 6 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 o u t p u t v o l t a g e ( v ) ht7727a output voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 9 0 % 8 5 % 8 0 % 7 5 % 7 0 % 6 5 % 6 0 % 5 5 % v i n = 1 . 2 v v i n = 1 . 6 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 e f f i c i e n c y ( % ) ht7727a efficiency v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 6 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 r i p p l e v o l t a g e ( m v ) ht7727a ripple voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 6 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 r i p p l e v o l t a g e ( m v ) ht7727a ripple voltage v.s output current (c in =47mf-t antalum, l=100 m h, c out =22mf-t antalum) 1 0 . 9 0 . 8 0 . 7 0 . 6 0 . 5 0 . 4 0 . 3 0 . 2 0 . 1 o u t p u t c u r r e n t ( m a ) 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 i n p u t v o l t a g e ( v ) s t a r t - u p h o l d - o n ht7727a start-up/hold-on voltage (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) i o u t = 1 0 m a - 4 0 i o u t = 3 0 m a i o u t = 5 0 m a i o u t = 1 0 0 m a - 1 5 1 0 3 5 6 0 8 5 t e m p e r a t u r e ( c ) e f f i c i e n c y ( % ) 0 % 2 0 % 4 0 % 6 0 % 8 0 % 1 0 0 % ht7727a efficiency v.s temperature
ht77xxa rev 1.40 5 june 25, 2016 3 . 0 3 2 . 9 5 2 . 8 8 2 . 8 0 2 . 7 3 2 . 6 5 2 . 5 8 2 . 5 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 o u t p u t v o l t a g e ( v ) v i n = 2 . 0 v ht7730a output voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 9 0 % 8 5 % 8 0 % 7 5 % 7 0 % 6 5 % 6 0 % 5 5 % v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 e f f i c i e n c y ( % ) ht7730a efficiency v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 r i p p l e v o l t a g e ( m v ) ht7730a ripple voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 r i p p l e v o l t a g e ( m v ) ht7730a ripple voltage v.s output current (c in =47mf-t antalum, l=100 m h, c out =22mf-t antalum) 1 0 . 9 0 . 8 0 . 7 0 . 6 0 . 5 0 . 4 0 . 3 0 . 2 0 . 1 o u t p u t c u r r e n t ( m a ) 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 i n p u t v o l t a g e ( v ) h o l d - o n s t a r t - u p ht7730a start-up/hold-on voltage (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum)
ht77xxa rev 1.40 6 june 25, 2016 3 . 4 3 . 3 3 . 2 3 . 1 3 . 0 2 . 9 2 . 8 2 . 7 2 . 6 2 . 5 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 o u t p u t v o l t a g e ( v ) ht7733a output voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 9 0 % 8 5 % 8 0 % 7 5 % 7 0 % 6 5 % 6 0 % 5 5 % v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 e f f i c i e n c y ( % ) ht7733a efficiency v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 r i p p l e v o l t a g e ( m v ) v i n = 1 . 8 v ht7733a ripple voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 1 . 8 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 r i p p l e v o l t a g e ( m v ) ht7733a ripple voltage v.s output current (c in =47mf-t antalum, l=100 m h, c out =22mf-t antalum) 1 0 . 9 0 . 8 0 . 7 0 . 6 0 . 5 0 . 4 0 . 3 0 . 2 0 . 1 o u t p u t c u r r e n t ( m a ) 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 i n p u t v o l t a g e ( v ) s t a r t - u p h o l d - o n ht7733a start-up/hold-on voltage (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum)
ht77xxa rev 1.40 7 june 25, 2016 5 . 5 5 . 2 4 . 9 4 . 6 4 . 3 4 . 0 3 . 7 3 . 4 3 . 1 2 . 8 2 . 5 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 3 . 0 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 o u t p u t v o l t a g e ( v ) HT7750A output voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 9 0 % 8 5 % 8 0 % 7 5 % 7 0 % 6 5 % 6 0 % 5 5 % v i n = 1 . 2 v v i n = 1 . 5 v v i n = 3 . 0 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 e f f i c i e n c y ( % ) HT7750A efficiency v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 3 . 0 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 2 0 4 0 6 0 8 0 1 0 0 1 2 0 1 4 0 1 6 0 1 8 0 2 0 0 2 2 0 r i p p l e v o l t a g e ( m v ) HT7750A ripple voltage v.s output current (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) 3 6 0 3 1 0 2 6 0 2 1 0 1 6 0 1 1 0 6 0 1 0 v i n = 1 . 2 v v i n = 1 . 5 v v i n = 3 . 0 v v i n = 2 . 0 v o u t p u t c u r r e n t ( m a ) 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 r i p p l e v o l t a g e ( m v ) HT7750A ripple voltage v.s output current (c in =47mf-t antalum, l=100 m h, c out =22mf-t antalum) 1 . 2 1 . 1 1 0 . 9 0 . 8 0 . 7 0 . 6 0 . 5 0 . 4 0 . 3 0 . 2 0 . 1 o u t p u t c u r r e n t ( m a ) 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 i n p u t v o l t a g e ( v ) s t a r t - u p h o l d - o n HT7750A start-up/hold-on voltage (c in =47mf-t antalum, l=47 m h, c out =22mf-t antalum) i o u t = 1 0 m a - 4 0 i o u t = 3 0 m a i o u t = 5 0 m a i o u t = 1 0 0 m a - 1 5 1 0 3 5 6 0 8 5 t e m p e r a t u r e ( c ) e f f i c i e n c y ( % ) 0 % 2 0 % 4 0 % 6 0 % 8 0 % 1 0 0 % i o u t = 1 5 0 m a i o u t = 2 0 0 m a HT7750A efficiency v.s temperature
application circuits without ce pin with ce pin note: for the sot23-5 package, when ce is pulled low, the internal blocks of the device, such as the reference band gap, gain block, and all feedback and control circuitry will be switched off. the boost converter s output, v out , will be at a value one schottky diode voltage drop below the input voltage and the lx pin remains in a high im - pedance condition. the output capacitor and load at v out determine the rate at which v out decays. ht77xxa rev 1.40 8 june 25, 2016 + , % - 9 ! 1 !

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package information ht77xxa rev 1.40 9 june 25, 2016 note that the package information provided her e is for consultation purposes only. as this information may be updated at regular intervals users are reminded to consult the holtek website for the latest version of the package/carton information . additional supplementary information with regard to packaging is listed below. click on the relevant section to be transferred to the relevant website page. ? package information (include outline dimensions, product tape and reel specifications) ? the operation instruction of packing materials ? carton information
3-pin to92 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 0.180 0.205 b 0.170 0.210 c 0.500 0.580 d 0.015 typ e 0.010 typ f 0.050 typ g 0.035 typ h 0.125 0.142 0.165 symbol dimensions in mm min. nom. max. a 4.39 4.57 5.21 b 4.32 5.33 c 12.70 14.73 d 0.38 typ e 2.54 typ f 1.27 typ g 0.89 typ h 3.18 3.61 4.19 ht77xxa rev 1.40 10 june 25, 2016 3 #
3-pin sot89 outline dimensions symbol dimensions in inch min. nom. max. a 0.173 0.181 b 0.053 0.072 c 0.090 0.102 d 0.035 0.047 e 0.155 0.167 f 0.014 0.019 g 0.017 0.022 h 0.059 bsc i 0.055 0.063 j 0.014 0.017 symbol dimensions in mm min. nom. max. a 4.40 4.60 b 1.35 1.83 c 2.29 2.60 d 0.89 1.20 e 3.94 4.25 f 0.36 0.48 g 0.44 0.56 h 1.50 bsc i 1.40 1.60 j 0.35 0.44 ht77xxa rev 1.40 11 june 25, 2016 3 # + >
3-pin sot23-3 outline dimensions symbol dimensions in inch min. nom. max. a 0.057 a1 0.006 a2 0.035 0.045 0.051 b 0.012 0.020 c 0.003 0.009 d 0.114 bsc e 0.063 bsc e 0.037 bsc h 0.075 bsc l 0.110 bsc l1 0.024 bsc 0 8 symbol dimensions in mm min. nom. max. a 1.45 a1 0.15 a2 0.90 1.15 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 1.60 bsc e 0.95 bsc h 1.90 bsc l 2.80 bsc l1 0.60 bsc 0 8 ht77xxa rev 1.40 12 june 25, 2016 #
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5-pin sot23-5 outline dimensions symbol dimensions in inch min. nom. max. a 0.057 a1 0.006 a2 0.035 0.045 0.051 b 0.012 0.020 c 0.003 0.009 d 0.114 bsc e 0.063 bsc e 0.037 bsc h 0.075 bsc l 0.110 bsc l1 0.024 bsc 0 8 symbol dimensions in mm min. nom. max. a 1.45 a1 0.15 a2 0.90 1.15 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 1.60 bsc e 0.95 bsc h 1.90 bsc l 2.80 bsc l1 0.60 bsc 0 8 ht77xxa rev 1.40 13 june 25, 2016
ht77xxa rev 1.40 14 june 25, 2016 copyright 2016 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publica - tion. however, holtek assumes no responsibility arising from the use of the specifications de - scribed. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without fur - ther modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek s products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

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