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

The Main and Core switchers are all high efficiency, 1MHz fixed frequency PWM converters. Availability in a small (4mm × 4mm × 0.75mm) 24-pin QFN package makes the LTC3456 ideal for space-sensitive portable devices.

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
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC3456EUF#PBF4x4 QFN-24E$4.70$3.95
LTC3456EUF#TRPBF4x4 QFN-24E$4.05
Demo Boards
Part NumberDescriptionPrice
DC658ALTC3456EUF | PMIC without Battery Charger, 2V ≤ VIN ≤ 5.5V, 1.8Vout1@200mA, 3.3Vout2@150mA, 3.3Vout3@50mAContact Factory
Datasheet
Design Note
Reliability Data
LT Journal
Press Release
Related Product
LTC3456 - 2-Cell, Multi-Output DC/DC Converter with USB Power Manager
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LTC3456 Footprints and Symbols