MT3422 - Aerosemi

MT3422 Synchronous Step-Down Converter

The MT3422 is a 1.5MHz constant frequency current mode, dual high-efficiency PWM step-down converter. It is ideal for portable equipment requiring very high current up to 2A each channel from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions. The MT3422 also can run at 100% duty cycle for low dropout oper.

Features

 High Efficiency: Up to 96%
 1.5MHz Constant Frequency Operation
 Dual 2A Output Current
 No Schottky Diode Required
 2.3V to 6V Input Voltage Range
 Output Voltage as Low as 0.6V
 PFM Mode for High Efficiency in Light Load
 100% Duty Cycle in Dropout Operation
 Low Quiescent Current: 40μA
 Short Circuit Protection
 Thermal Fault Protection
 Inrush Current Limit and Soft Start
 <1μA Shutdown Current
 ESOP8 package APPLICATIONS
 Cellular and Smart Phones
 Wireless and DSL Modems
 PDAs
 Portable Instruments
 Digital Still and Video Cameras
 Set Top Box GENERAL DESCRIPTION Th.