LTC4441/LTC4441-1
N-Channel MOSFET
Gate Driver
FeaTures
DescripTion
The LTC®4441/LTC4441-1 is an N-channel MOSFET gate
driver that can supply up to 6A of peak output current.
The chip is designed to operate with a supply voltage of
up to 25V and has an adjustable linear regulator for the
gate drive. The gate drive voltage can be programmed
between 5V and 8V.
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6A Peak Output Current
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Wide V Supply Range: 5V to 25V
IN
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Adjustable Gate Drive Voltage: 5V to 8V
Logic Input Can Be Driven Below Ground
30ns Propagation Delay
Supply Independent CMOS/TTL Input Thresholds
Undervoltage Lockout
Low Shutdown Current: <12µA
Overtemperature Protection
Adjustable Blanking Time for MOSFET’s
Current Sense Signal (LTC4441)
Available in SO-8 and 10-Lead MSOP
(Exposed Pad) Packages
The LTC4441/LTC4441-1 features a logic threshold driver
input. This input can be driven below ground or above the
driver supply. A dual function control input is provided to
disable the driver or to force the chip into shutdown mode
with <12µA of supply current. Undervoltage lockout and
overtemperature protection circuits will disable the driver
output when activated. The LTC4441 also comes with an
open-drain output that provides adjustable leading edge
blanking to prevent ringing when sensing the source cur-
rent of the power MOSFETs.
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applicaTions
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Power Supplies
The LTC4441 is available in a thermally enhanced 10-lead
MSOPpackage.TheLTC4441-1istheSO-8versionwithout
the blanking function.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6677210.
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Motor/Relay Control
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Line Drivers
Charge Pumps
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Typical applicaTion
D1
L1
MBR10100
10µH 20A
V
52V
2A
OUT
V
IN
RISE/FALL Time vs CLOAD
6V TO 24V
+
+
22µF
25V
X7R
200
180
160
140
120
100
80
C
OUT
T
= 25°C
A
R1
330k
R5
DRV = 5V
CC
V
IN
FB
DRV
CC
C
VCC
10µF
X5R
R2
86.6k
SHUTDOWN
Q2 R6
Si7370
×2
SGND
OUT
LTC4441
EN/SHDN
RISE TIME
R3
5mΩ
R7
LTC3803
RBLANK
IN
60
PGND
SWITCHING
CONTROLLER
40
FALL TIME
BLANK
GATE
R4
20
100Ω
+
SENSE
0
0
5
10 15 20 25 30 35 40 45 50
(nF)
GND
FB
R8
C
LOAD
511k
4441 TA01b
R9
8.06k
4441 TA01a
44411fa
1