1. Products
  2. Power Management
  3. LED Driver IC
  4. Buck-Boost LED Drivers
  5. LTC3453


Features and Benefits

  • High Efficiency: 90% Typical Over Entire Li-Ion Battery Range
  • Wide VIN Range: 2.7V to 5.5V
  • Up to 500mA Continuous Output Current
  • Internal Soft-Start
  • Open/Shorted LED Protection
  • LED Current Matching Typically <2%
  • Constant Frequency 1MHz Operation
  • Low Shutdown Current: 6µA
  • Overtemperature Protection
  • Small Thermally Enhanced 16-Lead (4mm x 4mm) QFN Package

Product Details

The LTC3453 is a synchronous buck-boost DC/DC converter optimized for driving up to 4 white LEDs at a combined current of up to 500mA from a single Li-Ion battery input. The regulator operates in either synchronous buck, synchronous boost, or buck-boost mode, depending on input voltage and LED maximum forward voltage. Optimum efficiency is achieved using a proprietary architecture that determines which LED requires the largest forward voltage drop at its programmed current, and regulates the common output rail for lowest dropout. Efficiency of 90% can be achieved over the entire usable range of a Li-Ion battery (2.7V to 4.2V).

LED current is programmable to one of four levels (including shutdown) with dual current setting resistors and dual enable pins. In shutdown, the supply current is only 6µA.

A high constant operating frequency of 1MHz allows the use of a small external inductor. The LTC3453 is offered in a low profile (0.75mm) thermally enhanced 16-lead (4mm x 4mm) QFN package.


  • Cell Phones
  • Digital Cameras
  • PDAs
  • Portable Devices

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)

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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
LTC3453EUF#PBF Material Declaration Reliability Data 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
LTC3453EUF#TRPBF Material Declaration Reliability Data 16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)
Wafer Fabrication Data R415 Reliability Data

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Lead Times

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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.