DESCRIPTION

The  BL3406B  is  a  constant  frequency, 1.5MHz,  slope  compensated  current  mode PWM step-down converter working under an input  voltage  range  of  2.5V  to  5.5V.  This feature  makes  the  BL3406B  suitable  for single cell Li-ion battery-powered applications.

FEATURES

• High Efficiency: Up to 96%

• 1.5MHz Constant Switching Frequency

• Current Mode Operation for Excellent Line and Load Transient Response

• No Schottky Diode Required

• 2.5V to 5.5V Input Voltage Range

• 1.0V,1.2V,1.5V,1.8V,2.5V and 3.3V Fixed/Adjustable Output Voltage

• 100% Duty Cycle in Dropout Mode

• Low Quiescent Current: 180µA

• Over temperature Protection

• Short Circuit Protection

• Shutdown Quiescent Current < 1µA

• Space Saving 5-Pin Thin SOT23 Package

APPLICATIONS

• Cellular and Smart Phones

• Wireless Handsets and DSL Modems

• Microprocessors and DSP Core Supplies

• PDAs

• Digital Still and Video Cameras

• MP3/MP4/MP5 Players

• Portable Instruments