LTC4440-5
1
44405fb
For more information www.linear.com//LTC4440-5
Synchronous Phase-Modulated Full-Bridge Converter LTC4440-5 Driving a 1000pF Capacitive Load
Typical applicaTion
V
CC
INP
GND
BOOST
TG
TS
LTC4440-5
IN
V
CC
4V TO 15V
V
CC
INP
GND
BOOST
TG
TS
LTC4440-5
LTC3722-1
• •
TG-TS
INP
50ns/DIV
V
= BOOST-TS = 5V
FeaTures DescripTion
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 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
L
TC4440-5’
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 LTC4440-5 LTC4440A-5 LTC4440
Max Operating TS 60V 80V 80V
Absolute Max TS 80V 100V 100V
MOSFET Gate Drive 4V to 15V 4V to 15V 8V to 15V
V
CC
UV
+
3.2V 3.2V 6.3V
V
CC
UV
–
3.04V 3.04V 6.0V
applicaTions
n
Wide Operating V
IN
Range: Up to 60V
n
Rugged Architecture Tolerant of 80V V
IN
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
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.