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