LTC4440 - High Speed, High Voltage High Side Gate Driver

Features

  • Wide Operating VIN Range: Up to 80V
  • Rugged Architecture Tolerant of 100V VIN Transients
  • Powerful 1.5Ω Driver Pull-Down
  • Powerful 2.4A Peak Current Driver Pull-Up
  • 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
  • Low Profile (1mm) SOT-23 (ThinSOT)™ and Thermally Enhanced 8-Pin MSOP Packages

Typical Application

LTC4440 Typical Application
LTC4440 Typical Application

Description

The LTC®4440 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 LTC4440 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 LTC4440’s pull-up has a peak output current of 2.4A and its pull-down has an output impedance of 1.5Ω.

The LTC4440 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 115V above ground.

The LTC4440 contains both high side and low side undervoltage lockout circuits that disable the external MOSFET when activated.

The LTC4440 is available in the low profile (1mm) SOT-23 and thermally enhanced 8-lead MSOP packages.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

MS-8, SOT-23

LTC4440 Package Drawing
LTC4440 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4440AHMS8E-5#PBF MSOP 8 H $3.13 $2.19 View
LTC4440AHMS8E-5#TRPBF MSOP 8 H $2.25 View
LTC4440AIMS8E-5#PBF MSOP 8 I $2.70 $1.89 View
LTC4440AIMS8E-5#TRPBF MSOP 8 I $1.95 View
LTC4440AMPMS8E-5#PBF MSOP 8 MP $7.31 $5.12 View
LTC4440AMPMS8E-5#TRPBF MSOP 8 MP $5.18 View
LTC4440EMS8E MSOP 8 E $2.50 $1.75 View
LTC4440EMS8E#PBF MSOP 8 E $2.50 $1.75 View
LTC4440EMS8E#TR MSOP 8 E $1.81 View
LTC4440EMS8E#TRPBF MSOP 8 E $1.81 View
LTC4440EMS8E-5 MSOP 8 E $2.50 $1.75 View
LTC4440EMS8E-5#PBF MSOP 8 E $2.50 $1.75 View
LTC4440EMS8E-5#TR MSOP 8 E $1.81 View
LTC4440EMS8E-5#TRPBF MSOP 8 E $1.81 View
LTC4440ES6 SOT-23 6 E $2.57 View
LTC4440ES6#TR SOT-23 6 E $2.57 $1.81 View
LTC4440ES6#TRM SOT-23 6 E $2.57 $1.83 View
LTC4440ES6#TRMPBF SOT-23 6 E $2.57 $1.83 View
LTC4440ES6#TRPBF SOT-23 6 E $2.57 $1.81 View
LTC4440ES6-5 SOT-23 6 E $2.57 View
LTC4440ES6-5#TR SOT-23 6 E $2.57 $1.81 View
LTC4440ES6-5#TRM SOT-23 6 E $2.57 $1.83 View
LTC4440ES6-5#TRMPBF SOT-23 6 E $2.57 $1.83 View
LTC4440ES6-5#TRPBF SOT-23 6 E $2.57 $1.81 View
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Telecommunications Power Systems
  • Distributed Power Architectures
  • Server Power Supplies
  • High Density Power Modules

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As". After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTC4440
LTC4440-5
LTC4440A-5

Technical Support