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p 1 / 11 rev. d , august 20 11 ml63 s ml63 s series dc - dc converter ? application ? power source of portable products ? palmtops ? portable cameras and video recorders ? wireless mouse and keyboard ? ordering information ? features ? small number of external components: inductor, diode and capa citor. ? ultra low input current : typical 7 ua ? output voltage accuracy : +/ - 2.5 % ? low ripple and noise ? low startup voltage : max 0.9v (with 1ma input) ? high efficiency: typical 8 5 % ? package available: sot - 89 (500mw) , sot - 23 (150mw) & to - 92 (300mw) ml63s version package designator package switching transistor ce function vdd pin fb pin features ml63s a m sot23 - 3 build - in transistor no no no lx p sot89 - 3 t to - 92 ml63s b m sot23 - 3 external transistor no no no ext p sot89 - 3 t to - 92 ml63s c m sot23 - 5 build - in transistor yes no no lx+ce p sot89 - 5 ml63s d m sot23 - 5 external transistor yes no no ext+ce p sot89 - 5 ml63s e m sot23 - 5 build - in transistor no yes no lx+vdd p sot89 - 5 ml63s f m sot23 - 5 build - in transistor no yes yes fb p sot89 - 5 ? general description the ml63s is a group of pfm step - u p dc/dc converter ic with low supply current by cmos process. it consists of an oscillator, a p fm control circuit, a lx switch driver transistor, a reference voltage un it, an error amplif ier for voltage detection and a lx switch protection circuit. it is suitable for use with battery - powered inst ruments with low noise and low supply current. designator description a version b output voltage eg. 30=3.0v 33=3.3v 50=5.0v c package type p = sot - 89 m = sot - 23 t = to - 92 d device orientation r = embossed tape (orientation of device : right) l = embossed tape (orientation of device : left) b = bag (to - 92) e g = lead free part
p 2 / 11 rev. d , august 20 11 ml63 s sot23: ml63 sa series part no. marking description ml63sa30mrg 7bxx ml63sa33mrg 77xx xx = production date ml63sa36mrg 74xx code ml63sa45mrg 7kxx e.g. b2 ml63sa50mrg 70xx ml63sc series part no. marking description ml63sc30mrg 7e xx ml63sc33mrg 7a xx x x = production date ml63sc36mrg 7hxx code ml63sc45mrg 7sxx e.g. b2 ML63SC50MRG 73xx sot89 : ml63sa and ml63sb series designator description 1,2 year code e.g. 05 = year 2005 3,4 week code e.g. 30 = week 30 5,6 output voltage e.g. 30 = 3.0v ? marking
p 3 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 3 sot89 - 3 to - 92 1 1 1 v ss ground 3 2 2 v out output voltage monitor, internal ic power supply 2 3 3 l x switch ? ml63sa ? pin configuration ? block diagram ? typical a pplications
p 4 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 3 sot89 - 3 to - 92 1 1 1 v ss ground 3 2 2 v out output voltage monitor, internal ic power supply 2 3 3 ext external switch transistor d rive ? ml63s b ? pin configuration ? blo ck diagram ? typical applications
p 5 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 5 sot89 - 5 4 5 v ss ground 2 2 v out output voltage monitor, internal ic power supply 5 4 lx switch 1 3 c e chip enable 3 1 nc nc ? ml63s c ? pin configuration ? block diagram ? typical applications
p 6 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 5 sot89 - 5 4 5 v ss ground 2 2 v out output voltage monitor, internal ic power supply 5 4 ext external switch transistor drive 1 3 ce chip enable 3 1 nc nc ? ml63s d ? pin configuration ? block diagram ? typical applications
p 7 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 5 sot89 - 5 4 5 v ss ground 2 2 v dd power supply 5 4 lx switch 1 3 v out output voltage monitor 3 1 nc nc ? ml63s e ? pin configuration ? block diagram ? typical applications
p 8 / 11 rev. d , august 20 11 ml63 s package pin number pin name function sot23 - 5 sot89 - 5 4 5 v ss ground 2 2 v out p ower supply 5 4 lx switch 1 3 fb feedback 3 1 nc nc ? ml63s f ? pin configuration ? block diagram ? typical applications
p 9 / 11 rev. d , august 20 11 ml63 s v in = v out * 0.6, v ss = 0v, i out = 10ma, t a = 25 o c , unless otherwise specifie d. parameter symbol conditions min typ max units output voltage v out vout * 0.975 vout vout * 1.025 v input voltage v in 6.5 v startup voltage v start i out = 1ma , v in : 0 ? 2v 0.8 0.9 v hold - on voltage v hold i out = 1ma , v in : 2 ? 0v 0.8 v supply curren t 1 i dd1 no external component , v in = v out * 0.95 35 ua supply current 2 i dd2 v in = v in + 0.5v 7 ua lx switching current i lx v lx = 0.4v, v in = v out * 0.95 15 0 ma lx leakage current i lxleak v in =v lx =6.0v 0.5 ua ce high voltage v ceh v in = v out * 0.95 0.9 v ce low voltage v cel v in = v out * 0.95 0.3 v ce high current i ceh v out = 6.0v, v ce = 6.0v - 0.5 0.5 ua ce low current i cel v out = 6.0v, v ce = 0.0v - 0.5 0.5 ua oscillator frequency f osc 1 0 0 khz duty cycle maxdty 7 8 % effic iency eff 8 5 % note : 1. schottk y diode : 1n5817 or 1n5819 (forward voltage drop : 0.2v) 2. inductor : 47uh (esr < 0.1 ? ) 3. capacitor : tantalum type, 47 uf ? absolute maximum ratings ? electrical characteristics parameter symbol ratings units input voltage v in 6.5 v v dd input voltage v dd 6.5 v lx pin voltage v lx 6.5 v ext pin voltage v ext - 0.3 ~ v out + 0.3 v ce pin voltage vce - 0.3 ~ v out + 0.3 v lx pin current i lx 600 ma ext pin current i ext + 30 ma continuous total power dissipation sot - 89 pd 500 mw to - 92 300 sot - 23 150 operating ambient temperature topr - 25 ~ +8 5 o c storage temperature tstg - 40 ~ +125 o c
p 10 / 11 rev. d , august 20 11 ml63 s v in = 1.6v, i out = 10ma, ta = 25 o c, unless otherwise provided . ml63s a2 7 v out = 2.7v parameter symbol conditions min typ max units output voltage v out 2.63 3 2.700 2.767 v input voltage v in 6.5 v startup voltage v start i out = 1ma 0.8 0.9 v hold - on voltage v hold i out = 1ma 0.8 v supply current 1 i dd1 v in = 2.57 v 35 ua supply current 2 i dd2 v in = 2.75 v 7 ua lx switching current i lx v lx =0.4v, v in =2.5 7 v 10 0 ma lx leakage current i lxleak v in = 6.0 v, v lx =6.0v 0.5 ua oscillator frequency f osc 1 0 0 khz oscillator duty cycle maxdty 7 8 % efficiency eff 8 5 % v in = 1. 8 v, i out = 10ma, ta = 25 o c, unless otherwise provided . ml63s a30 v out = 3.0 v parameter symbol conditions min typ max units output voltage v out 2. 925 3. 00 0 3.075 v input voltage v in 6.5 v startup voltage v start i out = 1ma 0. 8 0.9 v hold - on voltage v hold i out = 1ma 0.8 v supply current 1 i dd1 v in = 2.85 v 35 ua supply current 2 i dd2 v in = 3.05 v 7 ua lx switching current i lx v lx =0.4v, v in =2. 8 5v 15 0 ma lx leakage current i lxleak v in = 6.0 v, v lx =6.0v 0.5 ua oscillato r frequency f osc 1 0 0 khz oscillator duty cycle maxdty 7 8 % efficiency eff 8 5 % v in = 2.0 v, i out = 10ma, ta = 25 o c, unless otherwise provided . ml63s a33 v out = 3.3 v parameter symbol conditions min typ max units output voltage v out 3.218 3.3 0 0 3.383 v input voltage v in 6.5 v startup voltage v start i out = 1ma 0.8 0.9 v hold - on voltage v hold i out = 1ma 0.8 v supply current 1 i dd1 v in = 3.135 v 35 ua supply current 2 i dd2 v in = 3.35 v 7 ua lx switching current i lx v lx =0.4v, v in = 3.1 35 v 18 0 ma lx leakage current i lxleak v in = 6.0 v, v lx =6.0v 0.5 ua oscillator frequency f osc 1 0 0 khz oscillator duty cycle maxdty 7 8 % efficiency eff 8 5 % v in = 3.0 v, i out = 10ma, ta = 25 o c, unless otherwise provided . ml63s a50 v out = 5.0 v parameter symbol conditions min typ max units output voltage v out 4.875 5.0 0 0 5.125 v input voltage v in 6.5 v startup voltage v start i out = 1ma 0.8 0.9 v hold - on voltage v hold i out = 1ma 0.8 v supply current 1 i dd1 v in = 4.75 v 60 ua supply current 2 i dd2 v in = 5.05 v 7 ua lx switching current i lx v lx =0.4v, v in = 4.75 v 210 ma lx leakage current i lxleak v in = 6.0 v, v lx =6.0v 0.5 ua oscillator frequency f osc 1 0 0 khz oscillator duty cycle maxdty 7 8 % efficiency eff 8 5 % ? electrical characteristics
p 11 / 11 rev. d , august 20 11 ml63 s 1. it is recommended to use capacitor with a capacity of 10uf or more for good frequency characteristics, otherwise it will l ead to high output ripple. tantalum type capacitor is recommended. as there may be the case where a spike - shaped hi gh voltage is generated by the inductor when lx transistor is turned off, the operating voltage of capacitor should be at least three ti mes of the output set voltage so as to avoid over - voltage damage. 2. it is recommended to use inductor has sufficiently small d.c. resistance, large allowable current and hardly reaches magnetic saturation. when the inductance of inductor is small, there may be the case that the inductor current exceeds the absolute maximum ratings at the maximum load condition. 3. it is recommended to place external components as close as possible to the dc/d c converter so as to minimize the interconnection parasitic between components and dc/dc converter, especially for the capacitor connected to v out pin. it is recommended to place 0.1u f ceramic capacitor between v out pin and v ss pin. 4. it is recommended to provide sufficient grounding for v ss pin. this will help to stable the zero level within dc/dc converter induced by the switching current level variation during operation. and the i nsufficient grounding may result in unstable operation of dc/dc converter. ? appli cation notes the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use.

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