G5212 Global Mixed-mode Technology Wide Input Range Synchronous Buck DCDC Voltage Mode PWM Controller Features General Description The G5212 is a wide input range and fixed-frequency PWM controller with integrated MOSFET drivers for single power rail synchronous single-phase buck converter. G5212 utilizes voltage-mode control with internal compensation and an internal 0.8V reference voltage to implement the converter design. The switching frequency is fixed at 400kHz to reduce the external passive component size and make the board compact. The G5212 provides under voltage protection, current limit, over current protection and over temperature protection. For the over current protection function, the low-side MOSFET RDS(ON) is used to sense the inductor current. 10V to 28V Wide Input Voltage Range 0.8V Internal Reference Fixed 400kHz Switching Frequency Internal Soft Start function High DC Gain Voltage Mode PWM Controller Fast Transient Response 0 to 80% Duty Cycle Over Current Protection Under Voltage Protection Over Temperature Protection Compact Package TSOT-23-8 RoHS Compliant and Halogen Free Applications Set-Top Box Power Supplies PC Subsystem Power Supplies Cable Modems, DSL Modems DSP and Core Communication Processor Power Supplies Memory Power Supplies Personal Computer Peripherals Industrial Power Supplies Low Voltage Distributed Power Supplies Ordering Information ORDER NUMBER G5212Y51U Note:Y5:TSOT-23-8 1: Bonding Code U: Tape & Reel MARKING TEMP. RANGE PACKAGE (Green) 5212x -40°C to +85°C TSOT-23-8 Pin Configuration Typical Application Circuit VIN C2 G5212 VCC 1 8 LGATE 2 7 GND UGATE 3 6 4 5 TSOT-23-8 FB 1 VIN PHASE C4 D G5212 VCC C1 UGATE 7 R3 C3 BOOT 8 R1 BOOT VIN PHASE LGATE FB GND 5 4 CIN CBOOT Q1 L 6 2 VOUT Q2 COUT C5 3 R2 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Apr 02, 2013 1