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1 15 - http://www.elm-tech.com r ev.1. 2 parameter symbol limit unit apply voltage to l x pin vlx vss-0.3 to 8.0 v apply voltage to vout pin vout vss-0.3 to 8.0 v output current of lx pin ilx 5 00 ma power dissipation pd 5 00 (sot-89) mw 250 (sot-23) operating temperature top - 40 to + 85 c storage temperature tstg - 55 to + 125 c elm95 x x x x e cmos pwm step-up dc/dc converter elm 95xxxxe is cm os pwm step-up dc /dc converter which consists of reference voltage source, error amplifier, oscillation circuit, start-up circuit, pwm control circuit, switching current limit circuit, switch transistor and output voltage setting resistor. for external parts, coil, diode and capacitor are possible choices; with external parts, are 2.7v, 3.0v, 3.3v and 5.0v; elm95 series can also be designed as semi-custom ic within the range of 2.5v to 5.5v by 0.1v step . with newly-developed pwm control circuit, elm95 series is able to modulate switching time smoothly with constant frequency and consequently generates stable output with small ripples. there are two switching frequency and maximum duty ratio available:(switching frequency, maximum duty ratio)=(55khz, 60%) and (100khz, 77%). ? constant voltage source for battery-operated devices ? constant voltage source for cameras ? portable communication equipments ? local regulator g e neral description f eatures applica tion maximum a bsolute ratings ? output voltage range : 2.5v to 5.5v (by 0.1v step) ? low voltage operation : vin 0.9v ( no load) ? low power operation : 35 w ( elm9530ax e ) ? high ef fi ciency : typ. 85 % ? high output voltage accuracy : 2.5 % ? constant switching frequency : typ. 55 k hz(type a), typ.100khz(type b) ? output current (e.g.) : 100ma( type b, vin = 1.5v, vout =3.3v) ? small ripples : ceramic capacitor can be used for output capacitor. ? package : sot - 8 9, sot-23
2 15 - http://www.elm-tech.com r ev.1. 2 s tandard circuit ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? pin no. pin name 1 v ss 2 vout 3 lx so t - 89 (top view) pin configuration elm95 x x xxe cmos pwm step-up dc/dc converter elm95xxxx e - x symbol a, b output voltage e.g.: 27 : vout = 2.7v, 30 : vout = 3.0v 33 : vout = 3.3v, 50 : vout = 5.0v c switching frequency and maximum duty ratio a : s witching frequency= 55 k hz, maximum duty ratio=60% b : s witching frequency= 100 k hz, maximum duty ratio=77% d package a : sot-89 b : sot-23 e product version e f taping d irection s: refer to pkg file n : refer to pkg file elm95 x x x x e - x a b c d e f selection guide pin no. pin name 1 v ss 2 lx 3 vout so t - 23 (top view) elm95xxaxe ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? elm95xxbxe ceramic capacitors are recommended.
3 15 - http://www.elm-tech.com r ev.1. 2 l = 220 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 9 18 a output voltage vout vin = 1.5v, iout = 1ma 2.633 2.700 2.767 v on-resistance of lx switch ron vout =vout(t) 0.95 0.65 1.20 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 35 55 75 k hz maximum duty ratio duty vout =vout(t) 0.95 45 60 75 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma block diagram electrical characteristics (elm95xxaxe) vout=2.7v(elm95 27ax e) elm95 x x xxe cmos pwm step-up dc/dc converter ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? * vout(t) : typ. value of vout l = 220 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 12 20 a output voltage vout vin = 1.5v, iout = 1ma 2.925 3 .000 3 .075 v on-resistance of lx switch ron vout =vout(t) 0.95 0.6 1.1 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 35 55 75 k hz maximum duty ratio duty vout =vout(t) 0.95 45 60 75 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=3.0v( elm95 30 ax e) * vout(t) : typ. value of vout
4 15 - http://www.elm-tech.com r ev.1. 2 l = 220 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 14 23 a output voltage vout vin = 1.5v, iout = 1ma 3.218 3 .300 3.382 v on-resistance of lx switch ron vout =vout(t) 0.95 0.55 1.00 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 35 55 75 k hz maximum duty ratio duty vout =vout(t) 0.95 45 60 75 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=3.3v (elm95 33 ax e) * vout(t) : typ. value of vout l = 220 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 3.0 v, iout=1ma 30 45 a output voltage vout vin = 3.0 v, iout = 1ma 4.875 5 .000 5 .125 v on-resistance of lx switch ron vout =vout(t) 0.95 0.45 0.80 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 35 55 75 k hz maximum duty ratio duty vout =vout(t) 0.95 45 60 75 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=5.0v (elm95 50 ax e) * vout(t) : typ. value of vout l = 10 0 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 15 30 a output voltage vout vin = 1.5v, iout = 1ma 2.633 2.700 2.767 v on-resistance of lx switch ron vout =vout(t) 0.95 0.6 1.1 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 80 100 120 k hz maximum duty ratio duty vout =vout(t) 0.95 70 77 85 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma electrical characteristics (elm95xxbxe) vout=2.7v( elm95 27bx e) * vout(t) : typ. value of vout elm95 x x xxe cmos pwm step-up dc/dc converter
5 15 - http://www.elm-tech.com r ev.1. 2 l = 10 0 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 18 32 a output voltage vout vin = 1.5v, iout = 1ma 2.925 3 .000 3.075 v on-resistance of lx switch ron vout =vout(t) 0.95 0.6 1.1 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 80 100 120 k hz maximum duty ratio duty vout =vout(t) 0.95 70 77 85 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=3.0v( elm95 30 bx e) * vout(t) : typ. value of vout l = 10 0 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 1.5v, iout=1ma 20 35 a output voltage vout vin = 1.5v, iout = 1ma 3.218 3 .300 3.382 v on-resistance of lx switch ron vout =vout(t) 0.95 0.55 1.00 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 80 100 120 k hz maximum duty ratio duty vout =vout(t) 0.95 70 77 85 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=3.3v( elm95 3 3 bx e) * vout(t) : typ. value of vout l = 10 0 h, cin=cout = 47 f , d = db2j208 , vss = 0v, top = 25c parameter symbol condition min. typ. max. unit input voltage vin 0.9 7.0 v starting voltage vst no l oad 0.9 v holding voltage v hold iout = 1ma 0.7 v current consumption iss vin = 3.0 v, iout=1ma 35 5 5 a output voltage vout vin = 3.0 v, iout = 1ma 4.875 5 .000 5.125 v on-resistance of lx switch ron vout =vout(t) 0.95 0.45 0.80 leakage current of lx pin ilxl vout = vlx = 7. 0v 1.0 a oscillating frequency fosc vout =vout(t) 0.95 80 100 120 k hz maximum duty ratio duty vout =vout(t) 0.95 70 77 85 % current limit of lx switch llimit vout =vout(t) 0.95 600 ma vout=5.0v( elm95 50 bx e) * vout(t) : typ. value of vout elm95 x x xxe cmos pwm step-up dc/dc converter
6 15 - http://www.elm-tech.com r ev.1. 2 marking elm95 x x xxe cmos pwm step-up dc/dc converter s ot - 89 symbol output voltage range (v) package switching frequency 5p 2 .5~3.0 sot-89 55khz 5q 2 .5~3.0 sot-89 100khz 5r 3 .1~5.5 sot-89 55khz 5s 3 .1~5.5 sot-89 100khz 5t 2.5 ~3.0 sot-23 55khz 5u 2.5 ~3.0 sot- 23 100khz 5v 3 .1~5.5 sot- 23 55khz 5w 3 .1~5.5 sot- 23 100khz a, b : represents output voltage range and package type and switching frequency type s ot - 2 3 symbol output voltage(v) 1 3.1 2 3.2 3 3.3 4 3.4 5 3.5 6 3.6 7 3.7 8 3.8 9 3.9 0 4.0 a 4.1 b 4.2 c 4.3 d 4.4 e 4.5 c : represents output voltage. symbol output voltage(v) f 4.6 g 4.7 h 4.8 j 4.9 k 5.0 l 5.1 m 5.2 n 5.3 p 5.4 q 2.5 5.5 r 2.6 s 2.7 t 2.8 u 2.9 v 3.0 d : represents the assembly lot number 1~0, a~z repeated (i,o,x excepted)
7 15 - http://www.elm-tech.com r ev.1. 2 0 40 80 120 160 200 240 280 320 360 400 4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 v in =3.0v, i out =100ma ti me ( ? s) v out (v) 0 40 80 120 160 200 240 280 320 360 400 4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 v in =3.0v, i out =100ma ti me ( ? s) v out (v) 0 40 80 120 160 200 240 280 320 360 400 4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 v in =3.0v, i out =100ma ti me ( ? s) v out (v) 0 40 80 120 160 200 240 280 320 360 400 4.75 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 v in =3.0v, i out =100ma ti me ( ? s) v out (v) ex ternal parts to design dc/dc converter using elm95 series, coil, diode, and capacitor are necessary. (refer to the standard circuit configuration.) 1) coil when cho osing choke coil, please select that whose core is not magnetically saturated, dc resistance is low, and which has sufficient margin for rated current. elm recommends to use inductance around 220 h for elm9 95xxaxe, and elm95xxbxe. for elm95 series, elm recommends following coil. ? slf7045t (tdk corporation) 2) diode when choosing diode, please select that whose forward voltage is small, switching speed is high and which has sufficient margin for rated current. for elm95 series, elm reco mmen ds scho ttky diodes. 3) capacitor when choosing capacitor, please select that which is generally used for smoothing power supply circuit, with comparatively large capacity, with small equivalent series resistance, and with large rated voltage. for elm95 series, elm reco mmen ds ceramic capaci tor, although aluminum electrolytic and tantalum ca - pacitors also can be used. under heavier load condition using small output capacitor, there might be cases that few hundred hertz wave motion will happen in output voltage waveform. under such cases, elm recommends to use capacitor with larger capacity. examples are shown as follows. elm recommends 47 f or larger for cout and 47 f for cin. on the other hand, under light load use (iout<20ma) only, it is possible to use smaller capacitors such as cin=cout=22 f. one of example of solution for large amplitude waveform with lower frequency are shown as follows: elm95 x x xxe cmos pwm step-up dc/dc converter elm9550axe vout waveform using cout=22 f elm9550axe vout waveform using cout= 47 f 4 ) remedies for noise the dc/dc converter may cause electromagnetic noise due to switching of coil under large current. solution is necessary especially when the ic is used in wireless devices. to reduce noise, this ic is designed in consider - ation of coil switching characteristics. the following methods are also effective to reduce noise. ? use shield-type, or magnetic shield coil. ? locate coil and diode to the lx terminal of ic as close as possible. ? select ground wire as thick and short as possible. ? connect ground wire of circuit to one point.
8 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter typical c haracteristics ? elm95 27axe( vout=2.7v , fosc=55khz, duty=60% ) l =220 h, cin=cout=47 f, d= db2j208 , top = 25c ? elm9527axe (vout=2.7v, fosc=55khz, duty=60%) l=220 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 iout=60ma iout=10ma iout=1ma v out -v in v in ( v) v out (v) 0.1 1 10 100 1000 2.3 2.4 2.5 2.6 2.7 2.8 2.9 v in =1.8v v in =0.9v v out -i out i out (ma) v out ( v) v in =1.5v v in =1.1v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v -40 -20 0 20 40 60 80 2.62 2.64 2.66 2.68 2.70 2.72 2.74 45 50 55 60 65 70 75 v out v out , frequency-top to p ( ? ) v out (v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 2.4 2.5 2.6 2.7 2.8 2.9 3.0 0 50 100 v out v in =1.5v load transient response time (ms) v out (v) i out 1ma 1ma 50ma i out (ma)
9 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 30 axe( vout=3.0v , fosc=55khz, duty=60% ) l =220 h, cin=cout=47 f, d= db2j208 , top = 25c ? elm9530axe (vout=3.0v, fosc=55khz, duty=60%) l=220 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 iout=60ma iout=10ma iout=1ma v out -v in v in ( v) v out (v) 0.1 1 10 100 1000 2.6 2.7 2.8 2.9 3.0 3.1 3.2 v in =2.4v v in =0.9v v out -i out i out (ma) v out (v) v in =1.5v v in =1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =2.4v -40 -20 0 20 40 60 80 2.92 2.94 2.96 2.98 3.00 3.02 3.04 45 50 55 60 65 70 75 v out v out , frequency-top top ( ? ) v out ( v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 2.7 2.8 2.9 3.0 3.1 3.2 3.3 0 50 100 v out v in =1.5v load transient response time (ms) v out ( v) i out 1ma 1ma 50ma i out ( ma)
10 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 3 3 axe( vout=3.3v , fosc=55khz, duty=60% ) l =220 h, cin=cout=47 f, d= db2j208 , top = 25c ? elm9533axe (vout=3.3v, fosc=55khz, duty=60%) l=220 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out (v) 0.1 1 10 100 1000 2.9 3.0 3.1 3.2 3.3 3.4 3.5 v in =2.4v v in =0.9v v out -i out i out (ma) v out (v) v in =1.5v v in =1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =2.4v -40 -20 0 20 40 60 80 3.22 3.24 3.26 3.28 3.30 3.32 3.34 45 50 55 60 65 70 75 v out v out , frequency-top to p ( ? ) v out (v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 3.0 3.1 3.2 3.3 3.4 3.5 3.6 0 50 100 v out v in =1.8v load transient response time (ms) v out ( v) i out 1ma 1ma 50ma i out (ma)
11 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 5 0 axe( vout=5.0v , fosc=55khz, duty=60% ) l =220 h, cin=cout=47 f, d= db2j208 , top = 25c ? elm9550axe (vout=5.0v, fosc=55khz, duty=60%) l=220 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 1.0 2.0 3.0 4.0 5.0 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out (v) 0.1 1 10 100 1000 4.6 4.7 4.8 4.9 5.0 5.1 5.2 v in =3.0v v in =0.9v v out -i out i out (ma) v out ( v) v in =1.5v v in = 1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in = 1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =3.0v -40 -20 0 20 40 60 80 4.84 4.88 4.92 4.96 5.00 5.04 5.08 45 50 55 60 65 70 75 v out v out , frequency-top top ( ? ) v out ( v) frequency v in =3.0v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.5 1.0 1.5 2.0 2.5 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 4.7 4.8 4.9 5.0 5.1 5.2 5.3 0 50 100 v out v in = 3.0v load transient response time (ms) v out ( v) i out 1ma 1ma 50ma i out (ma)
12 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 27 b xe( vout=2.7v , fosc=100khz, duty=77% ) l = 10 0 h, cin=cout= 47 f, d= db2j208 , top =25c ? elm9527bxe (vout=2.7v, fosc=100khz, duty=77%) l=100 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out ( v) 0.1 1 10 100 1000 2.3 2.4 2.5 2.6 2.7 2.8 2.9 v in =1.8v v in =0.9v v out -i out i out ( ma) v out ( v) v in =1.5v v in =1.1v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v -40 -20 0 20 40 60 80 2.62 2.64 2.66 2.68 2.70 2.72 2.74 90 95 100 105 110 115 120 v out v out , frequency-top i out (ma) v out (v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 2.4 2.5 2.6 2.7 2.8 2.9 3.0 0 50 100 v out v in =1.5v load transient response time (ms) v out (v) i out 1ma 1ma 50ma i out (ma)
13 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 3 0 b xe( vout=3.0v , fosc=100khz, duty=77% ) l = 10 0 h, cin=cout= 47 f, d= db2j208 , top =25c ? elm9530bxe (vout=3.0v, fosc=100khz, duty=77%) l=100 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out (v) 0.1 1 10 100 1000 2.6 2.7 2.8 2.9 3.0 3.1 3.2 v in =2.4v v in =0.9v v out -i out i out (ma) v out (v) v in =1.5v v in =1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =2.4v -40 -20 0 20 40 60 80 2.92 2.94 2.96 2.98 3.00 3.02 3.04 90 95 100 105 110 115 120 v out v out , frequency-top i out (ma) v out (v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 2.7 2.8 2.9 3.0 3.1 3.2 3.3 0 50 100 v out v in =1.5v load transient response time (ms) v out (v) i out 1ma 1ma 50ma i out (ma)
14 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 33 b xe( vout=3.3v , fosc=100khz, duty=77% ) l = 10 0 h, cin=cout= 47 f, d= db2j208 , top =25c ? elm9533bxe (vout=3.3v, fosc=100khz, duty=77%) l=100 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out (v) 0.1 1 10 100 1000 2.9 3.0 3.1 3.2 3.3 3.4 3.5 v in =2.4v v in =0.9v v out -i out i out (ma) v out (v) v in =1.5v v in =1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =2.4v -40 -20 0 20 40 60 80 3.22 3.24 3.26 3.28 3.30 3.32 3.34 90 95 100 105 110 115 120 v out v out , frequency-top i out (ma) v out (v) frequency v in =1.5v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 3.0 3.1 3.2 3.3 3.4 3.5 3.6 0 50 100 v out v in =1.8v load transient response time (ms) v out (v) i out 1ma 1ma 50ma i out (ma)
15 15 - http://www.elm-tech.com r ev.1. 2 elm95 x x xxe cmos pwm step-up dc/dc converter ? elm95 5 0 b xe( vout=5.0v , fosc=100khz, duty=77% ) l = 10 0 h, cin=cout= 47 f, d= db2j208 , top =25c ? elm9550bxe (vout=5.0v, fosc=100khz, duty=77%) l=100 ? h, cin=cout=47 ? f, d=db2j208, top=25 ? 0.0 1.0 2.0 3.0 4.0 5.0 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 iout=60ma iout=10ma iout=1ma v out -v in v in (v) v out (v) 0.1 1 10 100 1000 4.6 4.7 4.8 4.9 5.0 5.1 5.2 v in =3.0v v in =0.9v v out -i out i out (ma) v out (v) v in =1.5v v in =1.1v v in =1.8v 0.1 1 10 100 1000 50 60 70 80 90 100 v in =1.8v v in =0.9v efficiency-i out i out (ma) efficiency (%) v in =1.5v v in =1.1v v in =3.0v -40 -20 0 20 40 60 80 4.84 4.88 4.92 4.96 5.00 5.04 5.08 90 95 100 105 110 115 120 v out v out , frequency-top i out (ma) v out ( v) frequency v in =3.0v, i out =10ma frequency (khz) 0 10 20 30 40 50 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 vst vst, vhold-i out i out (ma) vst, vhold (v) vhold 0 2 4 6 8 10 12 14 16 18 20 4.7 4.8 4.9 5.0 5.1 5.2 5.3 0 50 100 v out v in =3.0v load transient response time (ms) v out (v) i out 1ma 1ma 50ma i out (ma)

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