Features and Benefits

  • Single Inductor
  • Regulated Output with Input Voltages Above, Below or Equal to the Output
  • Wide VIN Range: 2.4V to 5.5V
  • VOUT Range: 2.4V to 5.25V
  • Up to 500mA Peak Output Current
  • Synchronous Rectification: Up to 95% Efficiency
  • Manual or Programmable Automatic Burst Mode® Operation
  • Output Disconnect in Shutdown
  • Programmable Oscillator: 300kHz to 2MHz
  • Pin Compatible with LTC3440
  • Small Thermally Enhanced 10-Lead (3mm × 3mm)
  • DFN and 10-Lead MSOP Packages

Product Details

The LTC3532 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range.

The device includes two 0.36Ω N-channel MOSFET switches and two 0.42Ω P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor. Quiescent current is only 35μA in Burst Mode operation, maximizing battery life in portable applications. Automatic Burst Mode operation allows the user to program the load current for Burst Mode operation or to control it manually.

Other features include a 1μA shutdown, soft-start control, thermal shutdown, and peak current limit. The LTC3532 is available in a low profile (0.75mm) 10-lead (3mm × 3mm) DFN and 10-lead MSOP packages.


  • Miniature Hard Disk Drive Power Supply
  • MP3 Players
  • Handheld Instruments
  • Digital Cameras
  • Handheld Terminals

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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LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


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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.