Features

• Seamless Transition Between 2-Cell Battery, USB and AC Wall Adapter Input Power Sources
• Main Output: Fixed 3.3V Output
• Core Output: Adjustable from 0.8V to VBATT(MIN)
• Hot Swap Output for Memory Cards
• All Outputs Discharged to Ground During Shutdown
• Power Supply Sequencing: Main and Hot Swap Outputs Come Up After Core Output
• Accurate USB Current Limiting
• High Frequency Operation: 1MHz
• High Efficiency: Up to 92%
• Small (4mm × 4mm × 0.75mm) 24-Pin QFN Package

Typical Application

Applications

• GPS Portable Navigators
• MP3 Players
• Digital Cameras
• Handheld Computers

Packaging

Datasheet

• LTC3456 - 2-Cell, Multi-Output DC/DC Converter with USB Power Manager

Design Note

• DN1006 - Multiple Output DC/DC Converter Runs Off 2-Cell AA Batteries, USB or AC Wall Adapter

Reliability Data

• R415 - Reliability Data

LT Journal

• Sep 2005 Complete 2-Cell-AA/USB Power Manager in a 4mm × 4mm QFN

Press Release

• LTC3456 - Integrated Power Management IC for Wall Input, USB and 2-Cell Alkaline Applications

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