Features: Wide Operating VIN Range: Up to 80V
Rugged Architecture Tolerant of 100V VIN
Transients
Powerful 1.5Ω Driver Pull-Down
Powerful 2.4A Peak Current Driver Pull-Up
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)TM or Thermally
Enhanced 8-Pin MSOP Packages
Application Telecommunications Power Systems
Distributed Power Architectures
Server Power Supplies
High Density Power ModulesPinout
SpecificationsSupply Voltage
VCC............................................................ 0.3V to 15V
BOOST TS............................................... 0.3V to 15V
INP Voltage................................................ 0.3V to 15V
BOOST Voltage (Continuous)..................... 0.3V to 95V
BOOST Voltage (100ms)........................... 0.3V to 115V
TS Voltage (Continuous)................................ 5V to 80V
TS Voltage (100ms)..................................... 5V to 100V
Peak Output Current < 1µs (TG).................................. 4A
Driver Output TG (with Respect to TS)........ 0.3V to 15V
Operating Ambient Temperature Range
(Note 2)..................................................40°C to 85°C
Junction Temperature (Note 3)............................. 150°C
Storage Ambient Temperature Range..65°C to 150°C
Lead Temperature (Soldering, 10 sec)...................300°C
DescriptionThe LTC® 4440 is a high frequency high side N-channel MOSFET gate driver that is designed to operate in applica-tions with VIN voltages up to 80V. The LTC4440 can also withstand and continue to function during 100V VIN tran-sients. 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 compatible input thresholds with 350mV of hysteresis. The input logic signal is internally level-shifted to thebootstrapped supply, which may function at up to 115V above ground.
The device contains both high side and low side under- voltage lockout circuits that disable the external MOSFET when activated.
The LTC4440 is available in the low profile (1mm) SOT-23 or a thermally enhanced 8-lead MSOP package.
LTC4440 Data Sheet
