LTC3455/LTC3455-1 - Dual DC/DC Converter with USB Power Manager and Li-Ion Battery Charger

Features
  • Seamless Transition between Input Power Sources: Li-Ion Battery, USB, and 5V Wall Adapter
  • Accurate USB Current Limiting (500mA/100mA)
  • Two High Efficiency DC/DC Converters: Up to 96%
  • Thermal Regulation Maximizes Battery Charge Rate without Risk of Overheating
  • Full-Featured Li-Ion Battery Charger with 4.2V Float Voltage for LTC3455 and 4.1V for LTC3455-1
  • 4.1V Float Voltage (LTC3455-1) Improves Battery Life and High Temperature Safety Margin
  • Hot Swap Output for SDIO and Memory Cards
  • Pin-Selectable Burst Mode Operation
  • Output Disconnect: All Outputs Discharged to Ground During Shutdown
  • Available in a 4mm × 4mm × 0.75mm 24-Pin QFN Package
Typical Application

Applications
  • Handheld Computers
  • Digital Cameras
  • MP3 Players
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC3455EUF-1#PBF4x4 QFN-24E$5.64$3.95
LTC3455EUF-1#TRPBF4x4 QFN-24E$4.01
LTC3455EUF#PBF4x4 QFN-24E$5.64$3.95
LTC3455EUF#TRPBF4x4 QFN-24E$4.05
Demo Boards
Part NumberDescriptionPrice
DC1448ALTC3455EUF-1 Demo Board | USB Power Solution, USB / 5V Adapter Input, Linear Li-Ion Charger, Dual Sync Buck 3.15V @ 500mA, 1.8V @ 400mAContact Factory
DC631BLTC3455EUF Demo Board | USB Power Solution, USB / 5V Adapter Input, Linear Li-Ion Charger, Dual Sync Buck 3.15V @ 500mA, 1.8V @ 400mA$150.00
Datasheet
Design Note
Reliability Data
LT Journal
Press Release
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LTC3455 Footprints and Symbols