LTC4440
High Speed, High Voltage
High Side Gate Driver
FEATURES DESCRIPTION
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Wide Operating V Range: Up to 80V
The LTC 4440 is a high frequency high side N-channel
IN
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Rugged Architecture Tolerant of 100V V
MOSFET gate driver that is designed to operate in ap-
IN
Transients
plications with V voltages up to 80V. The LTC4440 can
IN
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Powerful 1.5 Driver Pull-Down
also withstand and continue to function during 100V V
IN
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Powerful 2.4A Peak Current Driver Pull-Up
transients. The powerful driver capability reduces switch-
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7ns Fall Time Driving 1000pF Load
ing losses in MOSFETs with high gate capacitances. The
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10ns Rise Time Driving 1000pF Load
LTC4440s pull-up has a peak output current of 2.4A and
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Drives Standard Threshold MOSFETs
its pull-down has an output impedance of 1.5.
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TTL/CMOS Compatible Inputs with Hysteresis
The LTC4440 features supply independent TTL/CMOS
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Input Thresholds are Independent of Supply
compatible input thresholds with 350mV of hysteresis.
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Undervoltage Lockout
The input logic signal is internally level-shifted to the
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Low Profile (1mm) SOT-23 (ThinSOT) and
bootstrapped supply, which may function at up to 115V
Thermally Enhanced 8-Pin MSOP Packages
above ground.
APPLICATIONS
The LTC4440 contains both high side and low side under-
voltage lockout circuits that disable the external MOSFET
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Telecommunications Power Systems
when activated.
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Distributed Power Architectures
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Server Power Supplies
The LTC4440 is available in the low profile (1mm) SOT-23
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High Density Power Modules
and thermally enhanced 8-lead MSOP packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PARAMETER LTC4440 LTC4440-5 LTC4440A-5
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.
Max Operating TS 80V 60V 80V
Absolute Max TS 100V 80V 100V
MOSFET Gate Drive 8V to 15V 4V to 15V 4V to 15V
+
V UV 6.3V 3.2V 3.2V
CC
V UV 6.0V 3.04V 3.04V
CC
TYPICAL APPLICATION
Synchronous Phase-Modulated Full-Bridge Converter
V
IN
36V TO 72V
100V PEAK TRANSIENT
LTC4440 Driving a 1000pF
(ABS MAX)
V
CC
Capacitive Load
8V TO 15V
LTC4440
V BOOST
CC
INPUT
INP TG
(INP)
2V/DIV
GND TS
OUTPUT
LTC4440
(TG TS)
5V/DIV
V V BOOST
CC
CC
LTC3722-1 INP TG
GND TS
4440 TA01
4440 F02
10ns/DIV
4440fb
1
For more information www.linear.com/LTC4440LTC4440
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage Peak Output Current < 1s (TG) ................................. 4A
V ........................................................ 0.3V to 15V Driver Output TG (with Respect to TS) ....... 0.3V to 15V
CC
BOOST TS ........................................... 0.3V to 15V Operating Temperature Range (Note 2)
INP Voltage ................................................ 0.3V to 15V LTC4440E ...........................................40C to 85C
BOOST Voltage (Continuous) ..................... 0.3V to 95V LTC4440I .......................................... 40C to 125C
BOOST Voltage (100ms) ...........................0.3V to 115V Junction Temperature (Note 3) ............................ 125C
TS Voltage (Continuous) ............................... 5V to 80V Storage Temperature Range .................. 65C to 150C
TS Voltage (100ms) .................................... 5V to 100V Lead Temperature (Soldering, 10 sec) ...................300C
PIN CONFIGURATION
TOP VIEW TOP VIEW
INP 1 8 TS
V 1 6 BOOST
CC
GND 2 7 TG
9
V 3 6 BOOST GND 2 5 TG
CC
5 NC
GND 4
INP 3 4 TS
MS8E PACKAGE
8-LEAD PLASTIC MSOP S6 PACKAGE
6-LEAD PLASTIC SOT-23
T = 125C, = 40C/W (NOTE 4)
JMAX JA
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB T = 125C, = 230C/W
JMAX JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4440EMS8E#PBF LTC4440EMS8E#TRPBF LTF9 8-Lead Plastic MSOP 40C to 85C
LTC4440IMS8E#PBF LTC4440IMS8E#TRPBF LTF9 8-Lead Plastic MSOP 40C to 125C
LTC4440ES6#PBF LTC4440ES6#TRPBF LTZY 6-Lead Plastic SOT-23 40C to 85C
LTC4440IS6#PBF LTC4440IS6#TRPBF LTZY 6-Lead Plastic SOT-23 40C to 125C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: