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Overview
Features and Benefits
- AEC-Q100 Qualified for Automotive Applications
- 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-Lead MSOP Package
Product Details
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.
For a similar driver in this product family, please refer to the chart below.
| Parameter | LTC4444 | LTC4446 | LTC4444-5 |
| Shoot-Through Protection | Yes | No | 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 | 3.55V |
Applications
- Distributed Power Architectures
- Automotive Power Supplies
- High Density Power Modules
- Telecommunications
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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.
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