High Voltage Synchronous N-Channel MOSFET Driver

The LTC4444-5 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 LTC4444-5 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 LTC4444-5 contains undervoltage lockout circuits that disable the external MOSFETs when activated. Adaptive shoot-through protection prevents both MOSFETs from conducting simultaneously.

Applications

* Distributed Power Architectures

* Automotive Power Supplies

* High Density Power Modules

* Telecommunication Systems

* Bootstrap Supply Voltage to 114V

* Wide VCC Voltage: 4.5V to 13.5V

* Adaptive Shoot-Through Protection

* 1.4A Peak Top Gate Pull-Up Current

* 1.75A Peak Bottom Gate Pull-Up Current

* 1.5Ω Top Gate Driver Pull-Down

* 0.75Ω 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