LTC4444 - High Voltage Synchronous N-Channel MOSFET Driver

Features

  • Bootstrap Supply Voltage to 114V
  • Wide VCC Voltage: 7.2V to 13.5V
  • Adaptive Shoot-Through Protection
  • 2.5A Peak TG Pull-Up Current
  • 3A Peak BG Pull-Up Current
  • 1.2Ω TG Driver Pull-Down
  • 0.55Ω BG Driver Pull-Down
  • 5ns TG Fall Time Driving 1nF Load
  • 8ns TG Rise Time Driving 1nF Load
  • 3ns BG Fall Time Driving 1nF Load
  • 6ns BG Rise Time Driving 1nF Load
  • Drives Both High and Low Side N-Channel MOSFETs
  • Undervoltage Lockout
  • Thermally Enhanced 8-Pin MSOP Package

Typical Application

LTC4444 Typical Application
LTC4444 Typical Application

Description

The LTC4444 is a high frequency high voltage gate driver that drives two N-channel MOSFETs in a synchronous DC/DC converter with supply voltages up to 100V. This powerful driver reduces switching losses in MOSFETs with high gate capacitance.

The LTC4444 is configured for two supply-independent inputs. The high side input logic signal is internally level‑shifted to the bootstrapped supply, which may function at up to 114V above ground.

The LTC4444 contains undervoltage lockout circuits that disable the external MOSFETs when activated. Adaptive shoot-through protection prevents both MOSFETs from conducting simultaneously.

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
LTC4444EMS8E#PBF MS-8E MS8E E 05-08-1662 Yes
LTC4444EMS8E#TRPBF MS-8E MS8E E 05-08-1662 Yes
LTC4444HMS8E#PBF MS-8E MS8E H 05-08-1662 Yes
LTC4444HMS8E#TRPBF MS-8E MS8E H 05-08-1662 Yes
LTC4444IMS8E#PBF MS-8E MS8E I 05-08-1662 Yes
LTC4444IMS8E#TRPBF MS-8E MS8E I 05-08-1662 Yes
LTC4444MPMS8E MS-8E MS8E MP 05-08-1662 No
LTC4444MPMS8E#PBF MS-8E MS8E MP 05-08-1662 Yes
LTC4444MPMS8E#TR MS-8E MS8E MP 05-08-1662 No
LTC4444MPMS8E#TRPBF MS-8E MS8E MP 05-08-1662 Yes


LTC4444 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
LTC4444EMS8E#PBF MS-8E E $2.61 $1.69 Yes
LTC4444EMS8E#TRPBF MS-8E E $1.75 Yes
LTC4444HMS8E#PBF MS-8E H $2.86 $2.00 Yes
LTC4444HMS8E#TRPBF MS-8E H $2.06 Yes
LTC4444IMS8E#PBF MS-8E I $2.80 $1.81 Yes
LTC4444IMS8E#TRPBF MS-8E I $1.87 Yes
LTC4444MPMS8E MS-8E MP $4.11 $2.88 No
LTC4444MPMS8E#PBF MS-8E MP $4.11 $2.88 Yes
LTC4444MPMS8E#TR MS-8E MP $2.94 No
LTC4444MPMS8E#TRPBF MS-8E MP $2.94 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
  • Automotive Power Supplies
  • High Density Power Modules
  • Telecommunications

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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:
LTC4444
LTC4444-5

Technical Support