Overview
Features and Benefits
- 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
Product Details
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 bottom 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 |
Applications
- Distributed Power Architectures
- Automotive Power Supplies
- High Density Power Modules
- Telecommunication Systems
Product Categories
Markets and Technologies
Product Lifecycle
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.
Documentation & Resources
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.
LTspice Simulations
Models for the following parts are available in LTspice:
LTC4446
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.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC4446EMS8E#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4446EMS8E#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4446IMS8E#PBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| LTC4446IMS8E#TRPBF | Material Declaration | Reliability Data | 8-Lead MSOP w/ EP | |
| Wafer Fabrication Data | R419 Reliability Data |
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Sample & Buy
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Lead Times
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