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LTC4440-5 - High Speed, High Voltage, High Side Gate Driver

The LTC®4440-5 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applications with VIN voltages up to 60V. The LTC4440-5 can also withstand and continue to function during 80V VIN transients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440-5’s pull-up has a peak output current of 1.1A and its pull-down has an output impedance of 1.85Ω.

The LTC4440-5 features supply independent TTL/CMOS compatible input thresholds with 350mV of hysteresis. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 95V above ground.

The LTC4440-5 is optimized for driving (5V) logic level FETs and contains an undervoltage lockout circuit that disables the external MOSFET when activated.

The LTC4440-5 is available in the low profile (1mm) SOT-23 or a thermally enhanced 8-lead MSOP package.

Features Wide Operating VIN Range: Up to 60V Rugged Architecture Tolerant of 80V VIN Transients Powerful 1.85Ω Driver Pull-Down (with 6V Supply) Powerful 1.1A Peak Current Driver Pull-Up (with 6V Supply) 7ns Fall Time Driving 1000pF Load 10ns Rise Time Driving 1000pF Load Drives Standard Threshold MOSFETs TTL/CMOS Compatible Inputs with Hysteresis Input Thresholds are Independent of Supply Undervoltage Lockout Low Profile (1mm) SOT-23 (ThinSOT™) and Thermally Enhanced 8-Pin MSOP Packages Typical Application

Applications Telecommunications Power Systems Distributed Power Architectures Server Power Supplies High Density Power Modules General Purpose Low-Side Driver Packaging