Overview

Features and Benefits

  • No External Components Required
  • Internal Voltage Triplers Produce High Side Gate Drive for Logic Level FETs
  • Ultralow Power:
    • 10µA Per Driver ON Current (LTC1982)
    • 20µA ON Current (LTC1981)
    • <1µA Shutdown Current
  • VCC Range: 1.8V to 5V
  • Gate Drive Outputs Driven to Ground During Shutdown
  • Gate Drive Outputs Internally Clamped to 7.5V Max
  • “Gate Drive Ready” Output (LTC1981)
  • Ultrasmall Application Circuit
  • 5-Pin SOT-23 Package (LTC1981)
  • 6-Pin SOT-23 Package (LTC1982)

Product Details

The LTC1981/LTC1982 are low-power, self-contained N-channel MOSFET drivers. An internal voltage tripler allows gates to be driven without the use of any external components. Internal regulation circuitry allows quiescent current to drop to 10µA per driver (20µA for LTC1981) once the gates are charged.

Low quiescent current and low shutdown current (under 1µA) make these parts ideal for battery and other power constrained systems. The wide input voltage range accommodates a variety of battery/input configurations.

Gate drive is internally clamped to 7.5V providing protection to the external MOSFET gate. The MOSFETs can be driven in either high side or low side mode.

The LTC1981 single driver version also includes a gate drive ready pin and twice the drive current capacity of the dual driver LTC1982.

The LTC1981 is available in a 5-pin SOT-23. The LTC1982 is available in a 6-pin SOT-23.

Applications

  • Cellular Telephones
  • Portable POS Terminal
  • Handheld Battery Powered Equipment

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.

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:

LTC1981

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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