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Technical content

Features

„ 2A Output Current „ 0.18Ω Internal Power MOSFET Switch „ Stable with Low ESR Output Ceramic Capaci- tors „ Up to 95% Efficiency „ 25µA Shutdown Mode „ Fixed 380kHz Frequency „ Thermal Shutdown „ Cycle-by-Cycle Over Current Protection „ Wide 4.75V to 20V Operating Input Range „ Output Adjustable from 1.22V to 12V „ Available in SOP-8 Package

Applications

„ PC Monitors „ DSL Modems „ Distributed Power Systems „ Pre-Regulator for Linear Regulators General Description The G5654 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 regula- tion. Current mode operation provides fast transient re- sponse and eases loop stabilization. Fault condition protection includes cycle-by-cycle cur- rent limiting, output short circuit protection and thermal shutdown. In shutdown mode the regulator draws 25µA of supply current. Programmable soft-start over- writes the internal soft-start for various requirement of output power up ramp and minimizes the inrush supply current at initial startup. The G5654 requires a minimum number of readily available standard external components. It is available in a SOP-8 package.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5654P11U G5654 -40 °C to +85°C SOP-8 G5654P12U G5654A -40 °C to +85°C SOP-8 Note: P1: SOP-8 1: Bonding Code U : Tape & Reel Pin Configuration Typical Application Circuit LX NC IN GND SS EN COMP FB SOP-8 G5654P11U 7 EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/28kΩ R2/16kΩCC2 optional IN CC 22µF MLCC VOUT 3.3V/2A 10µF RC G5654 ONOFF VOUT = 1.22V x ( 1 + )R1 EN COMP FB LX GND SS34 10µH R1/28kΩ R2/16kΩ IN 0.1µF VOUT 3.3V/2A G5654 100µF/220µF Electrolytic VIN 4.75V~20V CC2 CC 10µF RC ONOFF SS 0.1µF SS 0.1µF IN SS NC LX EN COMP FB GND SOP-8 G5654P12U LX NC IN GND SS EN COMP FB SOP-8 G5654P11U 7 EN COMP FB LX GND VIN 4.75V~20V D1 SS34 10µH R1/28kΩ R2/16kΩCC2 optional IN CC 22µF MLCC VOUT 3.3V/2A 10µF RC G5654 ONOFF ONOFF VOUT = 1.22V x ( 1 + )R1 EN COMP FB LX GND SS34 10µH R1/28kΩ R2/16kΩ IN 0.1µF VOUT 3.3V/2A G5654 100µF/220µF Electrolytic VIN 4.75V~20V CC2 CC 10µF RC ONOFF ONOFF SS 0.1µF SS 0.1µF SS 0.1µF SS 0.1µF IN SS NC LX EN COMP FB GND SOP-8 G5654P12U