描述 Description

The STI3408B is a 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 output voltage can be regulated as low as 0.6V. The STI3408B can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. This device offers two operation modes, PWM control and PFM Mode switching control, which allows a high efficiency over the wider range of the load.

特性 Features

. High Efficiency: Up to 96%. 1.5MHz Constance Frequency Operation. 1.2A Output Current. No Schottky Diode Required. 2.5V to 6V Input Voltage Range. Output Voltage as Low as 0.6V. 100% Duty Cycle in Dropout. Low Quiescent Current: 40μA. Slope Compensated Current Mode Control for Excellent Line and Load Transient Response. Short Circuit Protection. Thermal Fault Protection. Inrush Current Limit and Soft Start. Input over voltage protection(OVP). <1μA Shutdown Current. SOT23-5 Package(2)

應(yīng)用 Application

. Cellular and Smart Phones. Wireless and DSL Modems. PDA/MID/PAD. Digital Still and Video Cameras