1. Products
  2. Power Management
  3. Battery Management
  4. PMIC (DC/DC, PowerPath, and Battery Charger)
  5. LTC3456

Alternative Parts


Features and Benefits

  • 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

Product Details

The LTC3456 is a complete power management system IC optimized for a variety of portable applications. The device generates two separate power rails: a 3.3V (fixed) Main supply and a 1.8V (adjustable) Core supply. In addition, the LTC3456 contains a USB power manager, a Hot Swap output, a low-battery indicator and an alwaysalive VMAX output. The LTC3456 takes power from one of three sources: a Wall adapter, a USB port or a 2-cell Alkaline/NiCd/NiMH battery, in that order of priority. Current drawn from the USB port is accurately limited to 100mA or 500mA based on the state of the USBHP pin.

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.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

LTC3456 Companion Parts

Recommended µModule Isolator

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC3456EUF#PBF Material Declaration Reliability Data 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
LTC3456EUF#TRPBF Material Declaration Reliability Data 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
Wafer Fabrication Data R415 Reliability Data

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Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.