LTC4440A-5 Datasheet

• Wide Operating V_IN Range: Up to 80V
• Rugged Architecture Tolerant of 100V V_IN 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
• Thermally Enhanced 8-Lead MSOP Package

• Automotive Power Systems
• Telecommunications Power Systems
• Distributed Power Architectures
• Server Power Supplies
• High Density Power Modules
• General Purpose Low or High Side Driver

The LTC4440A-5 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applications with V_IN voltages up to 80V. The LTC4440A-5 can also withstand and continue to function during 100V V_IN transients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440A-5’s pull-up has a peak output current of 1.1A and its pull-down has an output impedance of 1.85Ω.

The LTC4440A-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 LTC4440A-5 is optimized for driving (5V) logic level FETs and contains an undervoltage lockout circuit that disables the external MOSFET when activated.

The LTC4440A-5 is available in the thermally enhanced 8-lead MSOP package.