unisonic technologies co., ltd l5200 cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2014 unisonic technologies co., ltd qw-r502-029.e low noise, regulated charge pump dc/dc converters ? description the utc l5200-xx series are low noise, constant frequency charge pump dc/dc converters and designed to increase efficiency in white led application. the operating voltage range is 2.7v ~ v out input with up to 100ma of output current. low external parts counts (one flying capacitor and two small bypass capacitors at v in and v out ) make the utc l5200-xx series ideally suited for small, battery-powered applications. a charge-pump architecture ma intains constant switching frequency to zero load and reduces both output and input ripple. the utc l5200-xx series have thermal shutdown capability to escape the device damaged from a continuous short-circuit. with built-in soft-start circuitry to prevents excessive current flow at v in during start-up. high switching frequency enables the use of small ceramic capacitors. a low-current shutdown feature disconnects the load from v in and reduces quiescent current to <1 a. the l5200-adj is available in msop-8 package and l5200-fixed in sot-26 and tsot-26 package. ? features * low noise constant frequency operation * output current: 100ma * 2mhz switching frequency * 4.5v/5.0v fixed output voltage * v in range: 2.7v ~ v out * automatic soft-start. * no inductors * less than 1 a of shutdown current ? ordering information ordering number package packing l5200l-ad-sm1-r msop-8 tape reel l5200l-45-ag6-r sot-26 tape reel L5200L-50-AH6-R tsot-26 tape reel note: xx: output voltage, re fer to marking information
l5200 cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-029.e ? marking information package voltage code marking msop-8 45: 4.5v 50: 5.0v ad :adj sot-26 tsot-26 5 4 3 le g voltage code 2 1 6 ? pin configurations 3 2 1 4 5 6 4 3 2 1 5 6 7 8 msop-8 v out fb shdn sgnd pgnd v in c + sot-26/tsot-26 c + v in c - c - v out gnd shdn utc l5200-adj utc l5200-xx (fixed) ? pin description pin no. pin name function l5200-adj l5200-xx msop-8 sot-26/tsot-26 1 6 c+ flying capacitor positive terminal 2 5 v in input supply voltage, s hould be bypassed with a 1 f~4.7 f low esr ceramic capacitor. 3 4 c flying capacitor negative terminal 4, 5 2 gnd ground terminal, should be tied to a ground plane for best performance 6 3 shdn shutdown mode, active-low input. a low on shdn disables the l5200 series. shdn must not be allowed to float. 7 x fb feedback input pin for adjustable output. an output divider should be connected from v out to fb to program the output voltage. 8 1 v out regulated output voltage, should be bypassed with a 1 f~4.7 f low esr ceramic capacitor as close as possible to the pin for best performance x : the pin is inexistent for sot-26 and tsot-26 package.
l5200 cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-029.e ? block diagram utc l5200 adjustable version (msop-8) utc l5200 fixed version (sot-26/tsot-26)
l5200 cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-029.e ? absolute maximum ratings parameter symbol ratings unit input voltage(to gnd) v in -0.3 ~ 6 v charge pump voltage(to gnd) v out -0.3 ~ 5.5 v shutdown voltage(to gnd) v shdn -0.3 ~ (v in +0.3) v maximum dc output current (note 1) i out 150 ma v out short-circuit duration indefinite operating temperature t opr -20 ~ +85 c storage temperature t stg -40 ~ +150 c notes 1: based on long-term current density limitations. 2: stressed above absolute maximum ratings may im pair life or cause permanent damage to the device. 3. the device is guaranteed to meet performance specification within 0 ~+70 operating temperature range and assured by design from -20 ~+85 , characteristic and correlation with static process control. ? electrical characteristics (t a =25c, v in =3.6v, c fly =1 f, c in =1 f, c out =1 f, unless otherwise specified.) parameter symbol test conditions min typ max unit input supply voltage range v in *2.7 v out v output voltage l5200-4.5v v out 4.41 4.5 4.59 v l5200-5.0v i out 100ma * 4.9 5 5.1 v shutdown input threshold v ih *1.3 v v il * 0.4 v feedback voltage (for l5200-adj ) v fb * 1.217 1.268 1.319 v output ripple voltage(for l5200-fixed ) v r v in =3v, i out =100ma 30 mv p-p operating supply current i cc i out =0ma, shdn =v in * 1.7 5 ma shutdown current i shdn shdn =0v, v out =0v * 1 a shutdown input current i ih shdn =v in * -1 1 a i il shdn =0v * -1 1 a feedback input current (for l5200-adj ) i fb v fb =1.4v * -50 50 na open-loop output resistance r ol v in =3v, i out =100ma v fb =0v (r ol (2v in ? v out )/i out ) 9.2 ? switching frequency f osc 1 mhz efficiency (for utc l5200-fixed ) v in =3v, i out =50ma 80 % soft start time t on v in =3v, i out =0ma 10%~90% 0.8 ms note: * stand for specifications which apply over the designed operat ing temperature range.
l5200 cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-029.e ? typical application circuit
l5200 cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-029.e ? typical characteristics (l5200-5.0v) o u t p u t v o l t a g e ( v ) o u t p u t v o l t a g e ( v ) 6 c in = c out = c fly = 1 f 5 4 3 2.7 3.0 3.3 3.6 3.9 4.2 4.5 supply voltage (v) no load supply current vs supply voltage t a = 85 t a = 25 t a = -40 3.0 2.4 1.6 1.0 2.7 3.0 3.3 3.6 3.9 4.2 4.5 supply voltage (v) oscillator frequency vs supply voltage t a = 85 t a = 25 t a = -40 v shdn = v in 2.8 2.6 2.2 2.0 1.8 1.4 1.2
l5200 cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-029.e ? typical characteristics (l5200-5.0v) (cont.) v out (ac coupled) 50mv/div load transient response 10 s/div v in = 3.3v i l 10ma ~ 90ma 50ma/div c out = 1 f v out (ac coupled) 20mv/div output ripple 200ns/div v in = 3.3v c out = 10 f c out = 3.3 f c out = 1 f i l = 100ma utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. 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.
|
