LTC4442/LTC4442-1 - High Speed Synchronous N-Channel MOSFET Drivers

Features

  • Wide VCC Range: 6V to 9.5V
  • 38V Maximum Input Supply Voltage
  • Adaptive Shoot-Through Protection
  • 2.4A Peak Pull-Up Current
  • 5A Peak Pull-Down Current
  • 8ns TG Fall Time Driving 3000pF Load
  • 12ns TG Rise Time Driving 3000pF Load
  • Separate Supply to Match PWM Controller
  • Drives Dual N-Channel MOSFETs
  • Undervoltage Lockout
  • Thermally Enhanced MSOP Package

Typical Application

LTC4442 Typical Application
LTC4442 Typical Application

Description

The LTC4442 is a high frequency gate driver designed to drive two N-channel MOSFETs in a synchronous buck DC/DC converter topology. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitance.

The LTC4442 features a separate supply for the input logic to match the signal swing of the controller IC. If the input signal is not being driven, the LTC4442 activates a shutdown mode that turns off both external MOSFETs. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 42V above ground.

The LTC4442 contains undervoltage lockout circuits on both the driver and logic supplies that turn off the external MOSFETs when an undervoltage condition is present. The LTC4442 and LTC4442-1 have different undervoltage lockout thresholds to accommodate a wide variety of applications. An adaptive shoot-through protection feature is also built-in to prevent power loss resulting from MOSFET cross-conduction current.

The LTC4442/LTC4442-1 are available in the thermally enhanced 8-lead MSOP package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC4442EMS8E-1#PBF MS-8E MS8E E 05-08-1662 Yes
LTC4442EMS8E-1#TRPBF MS-8E MS8E E 05-08-1662 Yes
LTC4442EMS8E#PBF MS-8E MS8E E 05-08-1662 Yes
LTC4442EMS8E#TRPBF MS-8E MS8E E 05-08-1662 Yes
LTC4442IMS8E-1#PBF MS-8E MS8E I 05-08-1662 Yes
LTC4442IMS8E-1#TRPBF MS-8E MS8E I 05-08-1662 Yes
LTC4442IMS8E#PBF MS-8E MS8E I 05-08-1662 Yes
LTC4442IMS8E#TRPBF MS-8E MS8E I 05-08-1662 Yes


LTC4442 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC4442EMS8E-1#PBF MS-8E E $1.79 $1.25 Yes
LTC4442EMS8E-1#TRPBF MS-8E E $1.31 Yes
LTC4442EMS8E#PBF MS-8E E $1.79 $1.25 Yes
LTC4442EMS8E#TRPBF MS-8E E $1.31 Yes
LTC4442IMS8E-1#PBF MS-8E I $1.99 $1.39 Yes
LTC4442IMS8E-1#TRPBF MS-8E I $1.45 Yes
LTC4442IMS8E#PBF MS-8E I $1.99 $1.39 Yes
LTC4442IMS8E#TRPBF MS-8E I $1.45 Yes
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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

  • Distributed Power Architectures
  • High Density Power Modules

Product Notifications

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Design Tools

LTspice

LTspice® software 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

Models for the following parts are available in LTspice:
LTC4442
LTC4442-1

Technical Support