G5676 Global Mixed-mode Technology 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 Thermal Shutdown Cycle-by-Cycle Over Current Protection Output Adjustable from 0.6V to VIN Available in SOP-8 (FD) Package The G5676 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. 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 G5676 requires a minimum number of readily available standard external components. It is available in SOP-8 (FD) package. Applications NB Distributed Power Systems Pre-Regulator for Linear Regulators Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5676F11U G5676 -40°C to +85°C SOP-8 (FD) Note: F1: SOP-8 (FD) 1 : Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit G5676 NC G5676 8 1 PGND VIN PVIN 7 2 NC 3 EN 4 Thermal Pad R1 40kΩ 10Ω GND LX 2.2µH LX PVIN 6 SVIN 5 FB SVIN 10µF FB R2 20kΩ 0.1µF OFF ON SOP-8 (FD) VOUT 1.8V/5A 22µFx2 EN PGND GND Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.5 Aug 12, 2011 1