鈻?/div>
DESCRIPTIO
6A Peak Output Current
Wide V
IN
Supply Range: 5V to 25V
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: <12碌A(chǔ)
Overtemperature Protection
Adjustable Blanking Time for MOSFET鈥檚
Current Sense Signal (LTC4441)
Available in SO-8 and 10-Lead MSOP
(Exposed Pad) Packages
The LTC
廬
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.
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 <12碌A(chǔ) 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
current of the power MOSFETs.
The LTC4441 is available in a thermally enhanced 10-lead
MSOP package. The LTC4441-1 is the SO-8 version with-
out the blanking function.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents
including 6677210.
APPLICATIO S
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Power Supplies
Motor/Relay Control
Line Drivers
Charge Pumps
TYPICAL APPLICATIO
V
IN
6V TO 24V
R5
SHUTDOWN
Q2
R6
R1
330k
FB
R2
86.6k
SGND
D1
L1
MBR10100
10碌H 20A
+
V
IN
DRV
CC
22碌F
25V
X7R
+
C
OUT
V
OUT
52V
2A
200
RISE/FALL TIME (ns)
OUT
C
VCC
10碌F
X5R
LTC4441
EN/SHDN
LTC3803
SWITCHING
CONTROLLER
GATE
SENSE
+
GND
FB
R7
RBLANK
IN
PGND
BLANK
R4
100鈩?/div>
Si7370
脳2
R3
5m鈩?/div>
R8
511k
R9
8.06k
4441 TA01
U
RISE/FALL Time vs C
LOAD
T
A
= 25擄C
180 DRV
CC
= 5V
160
140
120
100
80
60
40
20
0
0
5
10 15 20 25 30 35 40 45 50
C
LOAD
(nF)
4441 TA01b
U
U
RISE TIME
FALL TIME
44411f
1
LTC4441ES8-1相關(guān)型號(hào)PDF文件下載
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