LTC4440 Datasheet | Linear Technology

Features n Wide Operating VIN Range: Up to 80V n Rugged Architecture Tolerant of 100V VIN Transients n Powerful 1.5Ω Driver Pull-Down n Powerful 2.4A Peak Current Driver Pull-Up n 7ns Fall Time Driving 1000p F Load n 10ns Rise Time Driving 1000p F Load n Drives Standard Threshold MOSFETs n TTL/CMOS patible Inputs with Hysteresis n Input Thresholds are Independent of Supply n Undervoltage Lockout n Low Profile (1mm) SOT-23 (Thin SOT)™ and Thermally Enhanced 8-Pin MSOP Packages APPLICATIONS n Telemunications Power Systems n Distributed Power Architectures n Server Power Supplies n High Density Power Modules L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6677210. LTC4440 High Speed, High Voltage High Side Gate Driver DESCRIPTION The LTC®4440 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applications with VIN voltages up to 80V. The LTC4440 can also withstand and continue to function during 100V VIN transients. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitances. The LTC4440’s pull-up has a peak output current of 2.4A and its pull-down has an output impedance of 1.5Ω. The LTC4440 Features supply independent TTL/CMOS patible input thresholds with 350m V of hysteresis. The input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 115V above ground. The LTC4440 contains both high side and low side undervoltage lockout circuits that disable the external MOSFET when activated. The LTC4440 is available in the low profile (1mm) SOT-23 and thermally enhanced 8-lead MSOP packages. PARAMETER Max Operating TS Absolute Max TS MOSFET Gate Drive VCC UV+ VCC UV- LTC4440 80V 100V 8V to 15V 6.3V 6.0V LTC4440-5 60V 80V 4V to 15V 3.2V...