LTC4444 Datasheet

• AEC-Q100 Qualified for Automotive Applications
• Bootstrap Supply Voltage to 114V
• Wide V_CC 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

• Distributed Power Architectures
• Automotive Power Supplies
• High Density Power Modules
• Telecommunications

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.