LTC4446 - High Voltage High Side / Low Side N-Channel MOSFET Driver

Features

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

Typical Application

LTC4446 Typical Application
LTC4446 Typical Application

Description

The LTC4446 is a high frequency high voltage gate driver that drives two N-channel MOSFETs in a DC/DC converter with supply voltages up to 100V. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitance. The LTC4446’s pull-up for the top gate driver has a peak output current of 2.5A and its pull-down has an output impedance of 1.2Ω. The pull-up for the bot- tom gate driver has a peak output current of 3A and the pull-down has an output impedance of 0.55Ω.

The LTC4446 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 LTC4446 contains undervoltage lockout circuits that disable the external MOSFETs when activated.

The LTC4446 is available in the thermally enhanced 8-lead MSOP package.

The LTC4446 does not have adaptive shoot-through protection. For similar drivers with adaptive shoot-through protection, please refer to the chart below.

PARAMETER LTC4446 LTC4444 LTC4444-5
Shoot-Through Protection No Yes Yes
Absolute Max TS 100V 100V 100V
MOSFET Gate Drive 7.2V to 13.5V 7.2V to 13.5V 4.5V to 13.5V
VCC UV+ 6.6V 6.6V 4V
VCC UV– 6.15V 6.15V 3.5V

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
LTC4446EMS8E#PBF MS-8 MS8 E 05-08-1660 Yes
LTC4446EMS8E#TRPBF MS-8 MS8 E 05-08-1660 Yes
LTC4446IMS8E#PBF MS-8 MS8 I 05-08-1660 Yes
LTC4446IMS8E#TRPBF MS-8 MS8 I 05-08-1660 Yes


LTC4446 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
LTC4446EMS8E#PBF MS-8 E $2.42 $1.69 Yes
LTC4446EMS8E#TRPBF MS-8 E $1.75 Yes
LTC4446IMS8E#PBF MS-8 I $2.59 $1.81 Yes
LTC4446IMS8E#TRPBF MS-8 I $1.87 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
  • Telecommunication Systems

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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

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Models for the following parts are available in LTspice:
LTC4446

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