LTC3456

PRODUCTION

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

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Part Models
2
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Part Details

  • 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
LTC3456
2-Cell, Multi-Output DC/DC Converter with USB Power Manager
Efficiency and Power Loss vs Load Current (Battery Powered) Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
USB Isolators 1
LTM2884
PRODUCTION Isolated USB Transceiver with Isolated Power
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Evaluation Kits

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schematic 1
DC658A

LTC3456EUF | PMIC without Battery Charger, 2V ≤ VIN ≤ 5.5V, 1.8VOUT1@200mA, 3.3VOUT2@150mA, 3.3VOUT3@50mA

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Product Details

Demonstration Circuit 658 is a complete power management system using the LTC3456 for portable applications powered by a wall adapter, a USB port or a 2-cell alkaline battery, in that order of priority. DC658 provides three outputs: a 1.8V, 200mA core supply, a 3.3V, 150mA main supply, and a 3.3V, 50mA Hot Swap supply. All outputs are discharged to ground during shutdown. The synchronous buck (1.8V output) and the second converter (which operates as a buck or a boost depending on the power source, and provides 3.3V @ 150mA and 3.3V @ 50mA outputs) accept a 2V to 3.2V battery input or USB/Wall adapter input.
DC658A
LTC3456EUF | PMIC without Battery Charger, 2V ≤ VIN ≤ 5.5V, 1.8VOUT1@200mA, 3.3VOUT2@150mA, 3.3VOUT3@50mA
DC658A - Schematic

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