1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Up (Boost) Regulators
  5. Internal Power Switch Boost Regulators
  6. LT1946A


Features and Benefits

  • 1.5A, 36V Internal Switch
  • 2.7MHz Switching Frequency
  • Integrated Soft-Start Function
  • Adjustable Output from VIN to 35V
  • Low VCESAT Switch: 300mV at 1.5A (Typical)
  • 12V at 430mA from a 5V Input
  • Small Thermally Enhanced 8-Lead MSOP Package

Product Details

The LT1946A is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 12V at 430mA from a 5V input, the LT1946A is ideal for powering large TFT-LCD panels. The LT1946A switches at 2.7MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop compensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing optimized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capacitor which determines the input current ramp rate during start up. The 8-lead MSOP package and high switching frequency ensure a low profile overall solution less than 1.1mm high.

  Switching Frequency
LT1946 1.2MHz
LT1946A 2.7MHz


  • TFT-LCD Bias Supplies
  • GPS Receivers
  • DSL Modems
  • Local Power Supply

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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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
LT1946AEMS8E#PBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
LT1946AEMS8E#TRPBF Material Declaration Reliability Data 8-Lead MSOP w/ EP
Wafer Fabrication Data R365 Reliability Data

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Sample & Buy

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Buy Now Pricing

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List Pricing

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Lead Times

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Price Table Help


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.