FP5137B

Technology FP5137B 1 CHANNEL SYNCHRONOUS PWM CONTROL IC GENERAL DESCRIPTION The FP5137B is a synchronous buck switching regulator control IC for DC-DC applications field. The FP5137B includes a totem-pole high/low side stage for driving NMOS, high precision reference (0.8V) for comparing output voltage with feedback amplifier, an internal 200KHz oscillator and programmable soft start function. FEATURES £» £» £» £» £» £» £» Feedback Reference Voltage: 0.8V (2%) Peak Output Source/Drive Capability: 500mA Internal 200KHz Oscillator Programmable Soft Start function (SS) Short Circuit Protection function(SCP) Internal UVLO function Package: PDIP8/SOP8 SOP8 TYPICAL APPLICATION £» £» £» VGA Card High Efficiency DC-DC Converter Battery Charger VIN PDIP8 Vcc SS Vc HDrv VOUT FP5137B LDrv Comp Gnd FB Website: http://www.feeling-tech.com.tw Rev0.1 July 21, 2005 P1/FP5137B Free Datasheet http://www.datasheetlist.com/ Technology FUNCTIONAL BLOCK DIAGRAM Vcc Bias Generator 3V FP5137B 0.2V 3V 1.25V POR 4.0V 20uA Vc 3.5V 0. 2V SS 8 POR 0.8V 25K 25K FB 1 64uA Max Ct Oscillator 6 VC 5 Emor Amp Emor Comp S Q HDrv R Reset Dom 0.4V 2 3 VCC LDrv FbLo Comp COMP 7 POR 4 GND PIN DESCRIPTION MARK VIEW Name No. FB 1 VCC 2 LDRV 3 GND 4 HDRV 5 VC 6 COMP 7 SS 8 I/O I P O P O P O I Description Error amplifier inverting input pin IC power supply Low Side NMOS Driver IC ground High Side NMOS Driver A supply voltage for High Side Driver Error amplifier compensation output To ...