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.