LTC4440-5_15 Datasheet, PDF (1/14 Pages) Linear Technology – High Speed, High Voltage, High Side Gate Driver

Features
n _{Wide Operating VIN Range: Up to 60V}
n _{Rugged Architecture Tolerant of 80V VIN Transients}
n _{Powerful 1.85Ω Driver Pull-Down (with 6V Supply)}
n _{Powerful 1.1A Peak Current Driver Pull-Up}
(with 6V Supply)
n _{7ns Fall Time Driving 1000pF Load}
n _{10ns Rise Time Driving 1000pF Load}
n _{Drives Standard Threshold MOSFETs}
n _{TTL/CMOS Compatible Inputs with Hysteresis}
n _{Input Thresholds are Independent of Supply}
n _{Undervoltage Lockout}
n _{Low Profile (1mm) SOT-23 (ThinSOT™) and}
Thermally Enhanced 8-Pin MSOP Packages
Applications
n _{Telecommunications Power Systems}
n _{Distributed Power Architectures}
n _{Server Power Supplies}
n _{High Density Power Modules}
n _{General Purpose Low-Side Driver}
L, LT, LTC, LTM, Linear Technology, the Linear logo and PolyPhase are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 6677210.
LTC4440-5
High Speed, High Voltage,
High Side Gate Driver
Description
The LTC^®4440-5 is a high frequency high side N-channel
MOSFET gate driver that is designed to operate in appli-
cations with V_IN voltages up to 60V. The LTC4440-5 can
also withstand and continue to function during 80V V_IN
transients. The powerful driver capability reduces switch-
ing 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.
PARAMETER
Max Operating TS
Absolute Max TS
MOSFET Gate Drive
V_CC UV⁺
V_CC UV^–
LTC4440-5
60V
80V
4V to 15V
3.2V
3.04V
LTC4440A-5
80V
100V
4V to 15V
3.2V
3.04V
LTC4440
80V
100V
8V to 15V
6.3V
6.0V
Typical Application
Synchronous Phase-Modulated Full-Bridge Converter
V_IN
36V TO 60V
V_CC
4V TO 15V
LTC4440-5
V_CC BOOST
INP TG
GND TS
LTC3722-1
LTC4440-5
V_CC BOOST
INP TG
GND TS
••
4440 TA01
LTC4440-5 Driving a 1000pF Capacitive Load
TG-TS
2V/DIV
INP
2V/DIV
50ns/DIV
V_CC = BOOST-TS = 5V
4440-5 TA02
For more information www.linear.com//LTC4440-5
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