LTC4444 Datasheet | Linear Technology

Features nn AEC-Q100 Qualified for Automotive Applications nn Bootstrap Supply Voltage to 114V nn Wide VCC Voltage: 7.2V to 13.5V nn Adaptive Shoot-Through Protection nn 2.5A Peak TG Pull-Up Current nn 3A Peak BG Pull-Up Current nn 1.2Ω TG Driver Pull-Down nn 0.55Ω BG Driver Pull-Down nn 5ns TG Fall Time Driving 1n F Load nn 8ns TG Rise Time Driving 1n F Load nn 3ns BG Fall Time Driving 1n F Load nn 6ns BG Rise Time Driving 1n F Load nn Drives Both High and Low Side N-Channel MOSFETs nn Undervoltage Lockout nn Thermally Enhanced 8-Lead MSOP Package APPLICATIONS nn Distributed Power Architectures nn Automotive Power Supplies nn High Density Power Modules nn Telemunications All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 6677210. High Voltage Synchronous N-Channel MOSFET Driver DESCRIPTION The LTC®4444 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 Shoot-Through Protection Absolute Max TS MOSFET Gate Drive VCC UV+ VCC UV- LTC4444 Yes 100V 7.2V to 13.5V 6.6V 6.15V LTC4446 No 100V 7.2V to 13.5V 6.6V 6.15V LTC4444-5 Yes 100V 4.5V to 13.5V 4V 3.55V TYPICAL APPLICATION High Input Voltage Buck Converter VCC 7.2V TO 13.5V PWM1 (FROM CONTROLLER IC) PWM2 (FROM CONTROLLER IC) BOOST VCC LTC4444 TG TINP TS BINP VIN 100V (ABS...