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LTC4444 - High Voltage Synchronous N-Channel MOSFET Driver

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.

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

Applications Distributed Power Architectures Automotive Power Supplies High Density Power Modules Telecommunications Packaging