LTC4442

FEATURES ■ Wide VCC Range: 6V to 9.5V ■ 38V Maximum Input Supply Voltage ■ Adaptive Shoot-Through Protection ■ 2.4A Peak Pull-Up Current ■ 5A Peak Pull-Down Current ■ 8ns TG Fall Time Driving 3000pF Load ■ 12ns TG Rise Time Driving 3000pF Load ■ Separate Supply to Match PWM Controller ■ Drives Dual N-Channel MOSFETs ■ Undervoltage Lockout ■ Thermally Enhanced MSOP Package APPLICATIONS ■ Distributed Power Architectures ■ High Density Power Modules TYPICAL APPLICATION Synchronous Buck Converter Driver VCC 6V PWM BOOST LTC4442 VLOGIC TG VCC TS IN BG GND VIN 32V VOUT 4442 TA01a LTC4442/LTC4442-1 High Speed Synchronous N-Channel MOSFET Drivers DESCRIPTION The LTC®4442 is a high frequency gate driver designed to drive two N-channel MOSFETs in a synchronous buck DC/DC converter topology. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitance. The LTC4442 features a separate supply for the input logic to match the signal swing of the controller IC. If the input signal is not being driven, the LTC4442 activates a shutdown mode that turns off both external MOSFETs. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 42V above ground. The LTC4442 contains undervoltage lockout circuits on both the driver and logic supplies that turn off the external MOSFETs when an undervoltage condition is present. The LTC4442 and LTC4442-1 have different undervoltage lockout thresholds to accommoda...