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Overview

Features and Benefits

  • 2.7V to 5.5V Input Voltage Range
  • No Inductors
  • Typical Efficiency 50% Higher than LDOs
  • Spread Spectrum Operation
  • Low Input and Output Noise
  • Shutdown Disconnects Load from VIN
  • Dual Adjustable Independent Outputs (Range: 0.9V to 1.6V)
  • Output Current: 250mA Each Output
  • Low Operating Current: IIN = 60µA Typ (35µA with One Output Enabled)
  • Low Shutdown Current: IIN = 0.01µA Typ
  • Soft-Start Limits Inrush Current at Turn On
  • Short Circuit and Over Temperature Protected
  • Available in 4mm x 3mm 12-Pin DFN Package

Product Details

The LTC3252 is a switched capacitor step-down DC/DC converter that produces two adjustable regulated outputs from a single 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve a typical efficiency increase of 50% over that of a linear regulator. No inductors are required.

A unique constant frequency, spread spectrum architecture provides a very low noise regulated output as well as low noise at the input. The part also has Burst Mode® operation to provide high efficiency at low output currents, as well as ultralow current shutdown.

Low operating currents (60µA with both outputs enabled, 35µA with one output enabled) and low external parts count make the LTC3252 ideally suited for space-constrained battery-powered applications. The part is shortcircuit and overtemperature protected and is available in a tiny 4mm x 3mm 12-pin DFN package.

Applications

  • Handheld Electronic Devices
  • Cellular Phones
  • Low Voltage Logic Supplies
  • DSP Power Supplies
  • 3.3V to 1.5V Conversion

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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)

Documentation & Resources

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    Tools & Simulations

    LTspice

    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.

    LTspice

    Models for the following parts are available in LTspice:

    LTC3252

    Support & Discussions

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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.