描述 Description

The TMI3408 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 TMI3408 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%(@3.3V). 1.5MHz Constant Frequency Operation. 1.2A Output Current. No Schottky Diode Required. 2.5V to 6.0V 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. Soft Start time for 1ms. Short Circuit Protection with Frequency reduction mode. 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