LTC3455/LTC3455-1

NOT RECOMMENDED FOR NEW DESIGNS

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

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $5.19
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Part Details

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

Data Sheet 1

Reliability Data 1

User Guide 2

Design Note 2

Technical Articles 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Battery Fuel Gauge and Coulomb Counter 1
LTC2942
NOT RECOMMENDED FOR NEW DESIGNS Battery Gas Gauge with Temperature, Voltage Measurement
Dual-Supply Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
High Voltage Hot Swap Controllers 1
LTC4261
PRODUCTION Negative Voltage Hot Swap Controllers with ADC and I²C Monitoring
Pushbutton Controllers 1
LTC2955
RECOMMENDED FOR NEW DESIGNS Pushbutton On/Off Controller with Automatic Turn-On
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Evaluation Kits

eval board
schematic 1
DC631B

LTC3455EUF Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V @ 500mA, 1.8V @ 400mA

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Product Details

Demonstration circuit DC631 is a complete power solution for a USB powered device. Power is input from one of three sources, and three outputs are provided, as well as supervisory signals for a microprocessor. DC631 provides the following functions; 700mA CC/CV timer terminated charger suitable for 4.2V Li-Ion cells, USB power manager that insures compliance with the USB power specification, two 1.5MHz synchronous step-down converters and reset and power button status outputs for interfacing with a microprocessor.

eval board
schematic 2
DC1448A

LTC3455EUF-1 Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V at 500mA, 1.8V at 400mA

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Product Details

Demonstration circuit DC1448 is a complete power solution for a USB powered device. Power is input from one of three sources, and three outputs are provided, as well as supervisory signals for a microprocessor. DC631 provides the following functions; 700mA CC/CV timer terminated charger suitable for 4.1V Li-Ion cells, USB power manager that insures compliance with the USB power specification, two 1.5MHz synchronous step-down converters and reset and power button status outputs for interfacing with a microprocessor.
DC631B
LTC3455EUF Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V @ 500mA, 1.8V @ 400mA
DC631B - Schematic
DC1448A
LTC3455EUF-1 Demo Board | USB Power Solution, USB/5V Adapter Input, Linear Li-Ion Charger, Dual Synchronous Buck 3.15V at 500mA, 1.8V at 400mA
DC1448A - Schematic

Latest Discussions

7 Years Ago
RE: Help for design of a battery management system
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