Overview

Features and Benefits

  • Wide Operating VIN Range: Up to 80V
  • Rugged Architecture Tolerant of 100V VIN Transients
  • Powerful 1.85Ω Driver Pull-Down (with 6V Supply)
  • Powerful 1.1A Peak Current Driver Pull-Up (with 6V Supply)
  • 7ns Fall Time Driving 1000pF Load
  • 10ns Rise Time Driving 1000pF Load
  • Drives Standard Threshold MOSFETs
  • TTL/CMOS Compatible Inputs with Hysteresis
  • Input Thresholds are Independent of Supply
  • Undervoltage Lockout
  • Thermally Enhanced 8-Lead MSOP Package

Product Details

The LTC4440A-5 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applications with VIN voltages up to 80V. The LTC4440A-5 can also withstand and continue to function during 100V VIN transients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440A-5’s pull-up has a peak output current of 1.1A and its pull-down has an output impedance of 1.85Ω.

The LTC4440A-5 features supply independent TTL/CMOS compatible input thresholds with 350mV of hysteresis. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 95V above ground.

The LTC4440A-5 is optimized for driving (5V) logic level FETs and contains an undervoltage lockout circuit that disables the external MOSFET when activated.

The LTC4440A-5 is available in the thermally enhanced 8-lead MSOP package.

Parameter LTC4440A-5 LTC4440-5 LTC4440
Max Operating TS 80V 60V 80V
Abssolute Max TS 100V 80V 100V
MOSFET Gate Drive 4V to 15V 4V to 15V 8V to 15V
VCC UV+ 3.2 3.2 6.3
VCC UV 3.04V 3.04V 6.0V

Applications

  • Automotive Power Systems
  • Telecommunications Power Systems
  • Distributed Power Architectures
  • Server Power Supplies
  • High Density Power Modules
  • General Purpose Low or High Side Driver

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:

LTC4440
LTC4440-5
LTC4440A-5

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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