ver: 1.0 may 04, 2012 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5725 global mixed-mode technology 1mhz 1a synchronous step-down regulator features ? high efficiency: up to 93% ? low quiescent current: only 50 a during op- eration ? internal soft start function ? 1a output current ? 2.5v to 6v input voltage range ? 1mhz switching frequency ? no schottky diode required ? 100% duty cycle in dropout operation ? 0.6v reference allows low output voltages ? <1 a shutdown current ? current mode operation for excellent line and load transient response ? over temperature protected ? rohs compliant applications ? cellular telephones ? personal information appliances ? microprocessors and dsp core supplies ? wireless and dsl modems ? digital still and video cameras ? mp3 players ? portable instruments general description the G5725 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. supply current during operation is only 50 a and drops to <1 a in shutdown. the 2.5v to 6v input voltage range makes the G5725 ideally suited for single li-ion battery-powered applications. 100% duty cycle provides low dropout operation, ex- tending battery run time in portable systems. switching frequency is internally set at 1mhz, allowing the use of small surface mount inductors and capacitors. the internal synchronous switch increase efficiency and eliminates the need for an external schottky diode. built-in soft start function eliminates in-rush current that could damage the system. pin configuration typical application circuit vfb vin sot-23-5/tsot-23-5 5 4 1 en 2 3 gnd lx G5725 vin lx en vfb gnd G5725 c in 2.2 f cer v in 4~6v 1 43 5 2.2 h c fb r1 82k r2 18k c out 10 f cer v out 3.3v 300ma * (option) v out = 0.6v (1+ ) r1 r2 2 vfb vin sot-23-5/tsot-23-5 5 4 1 en 2 3 gnd lx G5725 vin lx en vfb gnd G5725 c in 2.2 f cer v in 4~6v 1 43 5 2.2 h c fb r1 82k r2 18k c out 10 f cer v out 3.3v 300ma * (option) v out = 0.6v (1+ ) r1 r2 v out = 0.6v (1+ ) r1 r2 2
ver: 0.2 dec 14, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5725a global mixed-mode technology 1mhz 1.5a synchronous step-down regulator features ? high efficiency: up to 93% ? low quiescent current: only 50 a during op- eration ? internal soft start function ? 1.5a output current ? 2.5v to 6v input voltage range ? 1mhz switching frequency ? no schottky diode required ? 100% duty cycle in dropout operation ? 0.6v reference allows low output voltages ? <1 a shutdown current ? current mode operation for excellent line and load transient response ? over temperature protected ? rohs compliant applications ? cellular telephones ? personal information appliances ? microprocessors and dsp core supplies ? wireless and dsl modems ? digital still and video cameras ? mp3 players ? portable instruments general description the G5725a is a high efficiency monolithic synchro- nous buck regulator using a constant frequency, cur- rent mode architecture. supply current during opera- tion is only 50 a and drops to <1 a in shutdown. the 2.5v to 6v input voltage range makes the G5725a ideally suited for single li-ion battery-powered applica- tions. 100% duty cycle provides low dropout operation, extending battery run time in portable systems. switching frequency is internally set at 1mhz, allowing the use of small surface mount inductors and capaci- tors. the internal synchronous switch increase effi- ciency and eliminates the need for an external schot- tky diode. built-in soft start function eliminates in-rush current that could damage the system. ordering information order number marking output voltage temp. range package (green) G5725at11u 57aax adjustable -40 c~ +85 c sot-23-5 G5725ato1u 57aax adjustable -40 c~ +85 c tsot-23-5 for other output voltage, please contact us at sales @ gmt.com.tw note:t1: sot-23-5 to:tsot-23-5 1: bonding code u: tape & reel pin configuration typical application circuit vfb vin sot-23-5/tsot-23-5 5 4 1 en 2 3 gnd lx G5725a vin lx en vfb gnd G5725a c in 2.2 f cer v in 4~6v 1 43 5 2.2 h c fb r1 82k r2 18k c out 10 f cer v out 3.3v 300ma * (option) v out = 0.6v (1+ ) r1 r2 2 vfb vin sot-23-5/tsot-23-5 5 4 1 en 2 3 gnd lx G5725a vin lx en vfb gnd G5725a c in 2.2 f cer v in 4~6v 1 43 5 2.2 h c fb r1 82k r2 18k c out 10 f cer v out 3.3v 300ma * (option) v out = 0.6v (1+ ) r1 r2 v out = 0.6v (1+ ) r1 r2 2
|
