Global Mixed-mode Technology Inc. G5754/G5754A 2A Step-down DC/DC Features General Description The G5754/G5754A is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. 2A Output Current 0.18Ω 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 4.75V to 24V Operating Input Range Output Adjustable from 1.22V to 21.6V(G5754) Output Adjustable from 0.92V to 21.6V(G5754A) Available in SOP-8 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 G5754/G5754A requires a minimum number of readily available standard external components. It is available in a SOP-8 package. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5754P11U G5754 -40°C to +85°C SOP-8 G5754AP11U G5754A -40°C to +85°C SOP-8 Note: P1: SOP-8 1: Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit INPUT 12V OFF C5 10nF C1 10µF 25V 3 8 ON 1 2 BS IN EN LX D1 G5754 SS / NC FB SS / NC 1 8 EN BS 2 7 COMP IN 3 6 FB LX 4 5 GND INPUT 12V OFF SOP-8 R2 10kΩ 1% C3 4.7nF C6 OPEN R1 10.5kΩ OUTPUT 2.5V/2A 1% 7 5 G5754/G5754A 6 COMP GND C4 10nF / Open not used L1 15µH 4 C2 22µF/6.3V CERAMIC R3 7.5kΩ C5 10nF C1 10µF 25V ON 3 8 1 C4 10nF / Open not used 2 BS IN EN LX D1 G5754A SS / NC FB 6 COMP GND 7 5 C6 OPEN L1 15µH 4 C3 4.7nF R1 17.2kΩ OUTPUT 2.5V/2A 1% R2 10kΩ 1% C2 22µF/6.3V CERAMIC R3 7.5kΩ TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Jul 26, 2010 1