G5675 Global Mixed-mode Technology Inc. 5A Synchronous Step-Down DC/DC General Description Features 5A Output Current* 75mΩ Ω Internal Power MOSFET Switch Stable with Low ESR Output Ceramic Capacitors or POSCAPs Less Than 1µA Shutdown Current 1MHz Switching Frequency Power Good Opened Drain Output Thermal Shutdown Cycle-by-Cycle Over Current Protection Output Adjustable from 0.6V to VIN Available in TDFN3X3-10 Package The G5675 is a monolithic step-down switch mode regulator with a built in internal power MOSFET. It achieves a continuous output current at 1MHz switching frequency with excellent load and line regulation. Current mode operation provides fast transient response and eases of loop stabilization. Power good function delivers power supply ready signal to the load. Fault condition protection includes cycle-by-cycle current limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator ground current is controlled less than 1µA. An Internal soft-start minimizes the inrush supply current at initial startup. *The output voltage should be less then 1.8V. If the Vout setting is larger then 1.8V, the output current will be less then 5A because of thermal protection. The G5675 requires a minimum number of readily available standard external components. It is available in TDFN3X3-10 package. Applications NB Distributed Power Systems Pre-Regulator for Linear Regulators Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5675RE1U 5675 -40°C to +85°C TDFN3X3-10 Note: RE: TDFN3X3-10 1 : Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit G5675 G5675 LX 1 LX 2 LX 3 10 PVIN Thermal Pad 9 PVIN 8 SVIN PG 4 7 NC EN 5 6 FB VIN PVIN 2.2µH R1 40kΩ 10Ω SVIN 20µF VOUT 1.8V/5A 22µFx2 LX FB R2 20kΩ 0.1µF 10kΩ OFF ON TDFN3X3-10 EN PGND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. PG VIN GND TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.1 Jul 22, 2011 1