描述 Description

The AS1308 is a 1MHz constant frequency current mode PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. The AS1308 can supply 2A (max.) of load current from a 2.5V to 6.5V input voltage. The output voltage for the AS1308-adj can be regulated as low as 0.6V, The AS1308 can also run at 100% duty cycle for low dropout applications.

The AS1308 is available in a low profile 5-pin, TSOT23 package

特性 Features

? High Efficiency：Up to 97%

? 1MHz Constant Switching Frequency

? 2A Available Load Current

? 2.5V to 6.5V Input Voltage Range:

? Output Voltage as low as 0.6V

? 100% Duty Cycle In Dropout

? Current Mode Control

? Short Circuit Protection

? Thermal Fault Protection

? <1μA Shutdown Current

? Space Saving 5-pin TSOT23 Package

應(yīng)用 Application

? Distributed Power Systems

? Battery Charger

? Pre-Regulator for Linear Regulators

? DSL Modems