Overview

Features and Benefits

  • 2.7V – 38V Operating Range (42V Abs Max)
  • IQ = 20μA Operating, 1.5μA in Shutdown
  • Multi-Mode Buck-Boost Charge Pump (2:1, 1:1, 1:2) with Automatic Mode Switching
  • 12V to 5V Efficiency = 81%
  • IOUT Up to 500mA
  • VOUT: Fixed 3.3V, 5V or Adjustable (2.5V to 5V)
  • Ultralow EMI Emissions
  • Engineered for Diagnostic Coverage in ISO 26262 Systems
  • Overtemperature, Overvoltage and Short Circuit Protection
  • Operating Junction Temperature: 150°C Max
  • POR/Watchdog Controller w/External Timing Control
  • Thermally Enhanced 16-Pin MSOP Package

Product Details

The LTC3246 is a switched capacitor buck-boost DC/DC converter with integrated watchdog timer. The device produces a regulated output (3.3V, 5V or adjustable) from a 2.7V to 38V input. Switched capacitor fractional conversion is used to maintain regulation over a wide range of input voltage. Internal circuitry automatically selects the conversion ratio to optimize efficiency as input voltage and load conditions vary. No inductors are required.

The LTC3246’s reset time and watchdog timeout may be set without external components, or adjusted using external capacitors. A windowed watchdog function is used for high reliability applications. The reset input can be used for additional supply monitoring or be configured as a pushbutton reset.

Low operating current (20μA without load, 1.5μA in shutdown) and low external parts count make the LTC3246 ideally suited for low power, space constrained automotive/ industrial applications. The device is short-circuit and overtemperature protected and is available in a thermally enhanced 16-pin MSOP package.

Applications

  • Automotive ECU/CAN Transceiver Supplies
  • Industrial/Telecom Housekeeping Supplies
  • Low Power 12V to 5V Conversion

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)

Tools & Simulations

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Models for the following parts are available in LTspice:

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Product Recommendations

LTC3246 Companion Parts

Recommended Related Parts

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.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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Evaluation Boards Pricing displayed is based on 1-piece.
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.