General Description

The AS1324 is a high-efficiency, constant-frequency synchronous buck converter available in adjustable- and fixed-voltage versions. The wide input voltage range (2.7V to 5.5V), automatic powersave mode and minimal external component requirements make the AS1324 perfect for any single Li-Ion battery-powered application.

Typical supply current with no load is 30µA and decreases to ≤1µA in shutdown mode.

Key Features

 High Efficiency: Up to 96%

 Output Current: 600mA

 Input Voltage Range: 2.7V to 5.5V

 Constant Frequency Operation: 1.5MHz

 Variable- and Fixed-Output Voltages

 No Schottky Diode Required

 Automatic Powersave Operation

 Low Quiescent Current: 30µA

 Internal Reference: 0.6V

 Shutdown Mode Supply Current: ≤1µA

 Thermal Protection

 5-pin TSOT-23 Package

Applications

The device is ideal for mobile communication devices, laptops and PDAs, ultra-low-power systems, threshold detectors/discriminators, telemetry and remote systems, medical instruments, or any other space-limited application with low power-consumption requirements.