G5764 Global Mixed-mode Technology 3A Step-down DC/DC Features General Description The G5764 is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation. 3A Output Current 0.15Ω Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capacitors Up to 95% Efficiency 30µA Shutdown Mode Fixed 380kHz Frequency Thermal Shutdown Cycle-by-Cycle Over Current Protection Wide 4.5V to 28V Operating Input Range Output Adjustable from 1.22V to 21.6V Available in SOP-8 (FD) Package Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator draws 30µA of supply current. Programmable soft-start overwrites the internal soft-start for various requirement of output power up ramp and minimizes the inrush supply current at initial startup. Applications PC Monitors DSL Modems Distributed Power Systems Pre-Regulator for Linear Regulators The G5764 requires a minimum number of readily available standard external components. It is available in a SOP-8 (FD) package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5764F11U G5764 -40°C to +85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1: Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit INPUT 12V G5764 BS IN 2 LX 3 GND 8 1 Thermal Pad 4 SS 7 EN 6 COMP 5 OFF C5 10nF C1 10µF 35V ON 2 7 8 C4 10nF FB SOP-8 (FD) 1 BS IN EN LX FB 5 COMP GND 4 6 C6 OPEN Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. D1 G5764 SS L1 15µH 3 C3 1nF R3 15kΩ R1 10.5kΩ OUTPUT 2.5V/3A 1% R2 10kΩ 1% C2 22µF/35V CERAMIC TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Aug 29, 2012 1