G5682 Global Mixed-mode Technology Inc. Step-Down DC/DC Features General Description The G5682 is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves 2A continuous output current over a wide switching frequency range with excellent load and line regulation. 2A Output Current 150mΩ Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency Less Than 1µA Shutdown Current Wide Switching Frequency Range from 300kHz~1.4MHz Thermal Shutdown Cycle-by-Cycle Over Current Protection Output Adjustable from 0.8V to VIN Available in SOP-8 Package Current mode operation provides fast transient response and eases of loop stabilization. Fault condition protection includes cycle-by-cycle current limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator draws less than 1µA of supply current. Internal soft-start minimizes the inrush supply current at initial startup. The G5682 requires a minimum number of readily available standard external components. It is available in SOP-8 package. Applications TV Distributed Power Systems Pre-Regulator for Linear Regulators Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5682P11U G5682 -40°C to +85°C SOP-8 Note: P1: SOP-8 1 : Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit G5682 VIN 5V G5682 COMP 1 8 FB GND 2 7 FREQ EN 3 6 LX* IN 4 5 LX CC2 optional *Pin#6 should be considered as LX when circuit design and PCB layout, but it is NC pin actually. 10µF OFF ON EN FB COMP CC FREQ GND CC2 optional D1 R1 22µF MLCC R2 G5682 IN 10µH LX 10µF OFF ON EN FB COMP CC GND FREQ D1 R1 R2 VOUT 3.3V/2A 0.1µF 220µF Electrolytic NC RC VOUT = 0.8V x ( 1 + VOUT 3.3V/2A NC RC VIN 5V SOP-8 10µH LX IN R1 R2 ) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Dec 09, 2009 1