LTC4441/LTC4441-1
N-Channel MOSFET
Gate Driver
FEATURES
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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: <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 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.
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
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
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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
10µH 20A
+
V
IN
DRV
CC
22µF
25V
X7R
+
C
OUT
V
OUT
52V
2A
200
RISE/FALL TIME (ns)
OUT
C
VCC
10µF
X5R
LTC4441
EN/SHDN
LTC3803
SWITCHING
CONTROLLER
GATE
SENSE
+
GND
FB
R7
RBLANK
IN
PGND
BLANK
R4
100Ω
Si7370
×2
R3
5mΩ
R8
511k
R9
8.06k
4441 TA01
U
RISE/FALL Time vs C
LOAD
T
A
= 25°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
LTC4441/LTC4441-1
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
Supply Voltage
V
IN
...................................................................... 28V
DRV
CC
.................................................................. 9V
Input Voltage
IN .......................................................... –15V to 15V
FB, EN/SHDN ........................ –0.3V to DRV
CC
+ 0.3V
RBLANK, BLANK (LTC4441 Only) .......... –0.3V to 5V
OUT Output Current ............................................ 100mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 8) ............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
PGND
BLANK
RBLANK
SGND
IN
1
2
3
4
5
10
9
8
7
6
OUT
DRV
CC
V
IN
FB
EN/SHDN
ORDER PART
NUMBER
LTC4441EMSE
LTC4441IMSE
MSE PART
MARKING
LTBJQ
LTBJP
PGND 1
SGND 2
IN 3
EN/SHDN 4
11
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 38°C/W (NOTE 3)
EXPOSED PAD (PIN 11) IS GND
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
DRVCC
I
VIN
PARAMETER
Driver Supply Programmable Range
V
IN
Supply Current
The
●
indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 7.5V, DRV
CC
= 5V, unless otherwise specified.
CONDITIONS
●
EN/SHDN = 0V, IN = 0V
EN/SHDN = 5V, IN = 0V
f
IN
= 100kHz, C
OUT
= 4.7nF (Note 4)
V
IN
= 7.5V
V
IN
= 7.5V to 25V
Load = 0mA to 40mA
Load = 40mA
Rising Edge
Falling Edge
Rising Edge
Falling Edge
Rising-Falling Edge
V
IN
=
±10V
V
EN/SHDN
= 9V
Falling Edge
Rising Edge
Falling Edge
Rising-Falling Edge
DRV
CC
Regulator
V
FB
Regulator Feedback Voltage
●
∆V
DRVCC(LINE)
Regulator Line Regulation
∆V
DRVCC(LOAD)
Load Regulation
V
DROPOUT
V
UVLO
Input
V
IH
V
IL
V
IH
-V
IL
I
INP
I
EN/SHDN
V
SHDN
V
EN
V
EN(HYST)
IN Pin High Input Threshold
IN Pin Low Input Threshold
IN Pin Input Voltage Hysteresis
IN Pin Input Current
EN/SHDN Pin Input Current
EN/SHDN Pin Shutdown Threshold
EN/SHDN Pin Enable Threshold
EN/SHDN Pin Enable Hysteresis
Regulator Dropout Voltage
FB Pin UVLO Voltage
2
U
U
W
W W
U
W
TOP VIEW
8
7
6
5
OUT
DRV
CC
V
IN
FB
ORDER PART
NUMBER
LTC4441ES8-1
LTC4441IS8-1
S8 PART
MARKING
44411
4441I1
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 150°C/W
MIN
5
●
●
TYP
5
250
3
MAX
8
12
500
6
1.31
40
UNITS
V
µA
µA
mA
V
mV
%
mV
V
V
1.11
1.21
9
–0.1
370
1.09
0.97
●
●
●
●
2
1
2.4
1.4
1
±0.01
±0.01
0.45
1.21
1.09
0.12
2.8
1.8
±10
±1
V
V
V
µA
µA
V
V
V
V
44411f
●
1.036
1.145
LTC4441/LTC4441-1
ELECTRICAL CHARACTERISTICS
SYMBOL
Output
R
ONL
I
PU
I
PD
R
ON(BLANK)
V
RBLANK
Driver Output Pull-Down Resistance
Driver Output Peak Pull-Up Current
Driver Output Peak Pull-Down Current
BLANK Pin Pull-Down Resistance
RBLANK Pin Voltage
PARAMETER
The
●
indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 7.5V, DRV
CC
= 5V, unless otherwise specified.
CONDITIONS
I
OUT
= 100mA
DRV
CC
= 8V
DRV
CC
= 8V
IN = 0V, I
BLANK
= 100mA LTC4441 Only
R
BLANK
= 200kΩ LTC4441 Only
●
MIN
TYP
0.35
6
6
11
1.3
MAX
0.8
UNITS
Ω
A
A
Ω
V
Switching Timing
t
PHL
t
PLH
t
r
t
f
t
BLANK
Driver Output High-Low Propagation Delay
Driver Output Low-High Propagation Delay
Driver Output Rise Time
Driver Output Fall Time
Driver Output High to BLANK Pin High
C
OUT
= 4.7nF (Note 5)
C
OUT
= 4.7nF (Note 5)
C
OUT
= 4.7nF (Note 5)
C
OUT
= 4.7nF (Note 5)
R
BLANK
= 200kΩ (Note 6)
30
36
13
8
200
ns
ns
ns
ns
ns
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC4441E/LTC4441E-1 are guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC4441I/LTC4441I-1 are
guaranteed and tested over the – 40°C to 85°C operating temperature
range.
Note 3:
Failure to solder the Exposed Pad of the MSE package to the PC
board will result in a thermal resistance much higher than 38°C/W.
Note 4:
Supply current in normal operation is dominated by the current
needed to charge and discharge the external power MOSFET gate. This
current will vary with supply voltage, switching frequency and the external
MOSFETs used.
Note 5:
Rise and fall times are measured using 10% and 90% levels. Delay
times are measured from 50% of input to 20%/80% levels at driver
output.
Note 6:
Blanking time is measured from 50% of OUT leading edge to 10%
of BLANK with a 1kΩ pull-up at BLANK pin. LTC4441 only.
Note 7:
Guaranteed by design, not subject to test.
Note 8:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the maximum operating junction temperature
may impair device reliability.
TYPICAL PERFOR A CE CHARACTERISTICS
IN Low Threshold Voltage
vs Temperature
1.8
V
IN
= 7.5V
DRV
CC
= 5V
1.7
2.8
EN PIN INPUT THRESHOLD VOLTAGE (V)
IN PIN INPUT THRESHOLD (V)
1.6
1.5
1.4
1.3
1.2
1.1
1.0
–50
–25
0
75
50
25
TEMPERATURE (°C)
100
125
IN PIN INPUT THRESHOLD (V)
U W
4441 G01
IN High Threshold Voltage
vs Temperature
V
IN
= 7.5V
DRV
CC
= 5V
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2.0
–50
–25
0
75
50
25
TEMPERATURE (°C)
100
125
1.26
1.24
1.22
1.20
1.18
1.16
1.14
1.12
1.10
1.08
1.06
EN Pin Input Threshold Voltage
vs Temperature
V
IN
= 7.5V
DRV
CC
= 5V
RISING EDGE
FALLING EDGE
1.04
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
4441 G02
4441 G03
44411f
3
LTC4441/LTC4441-1
TYPICAL PERFOR A CE CHARACTERISTICS
FB Pin UVLO Threshold
vs Temperature
1.20
FB PIN UVLO THRESHOLD VOLTAGE (V)
1.16
1.12
1.08
1.04
1.00
0.96
0.92
0.88
0.84
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
FALLING EDGE
RISING EDGE
SD PIN INPUT THRESHOLD VOLTAGE (V)
V
IN
= 7.5V
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
FALLING EDGE
RISING EDGE
DRV
CC
VOLTAGE (V)
DRV
CC
Load Regulation
5.50
V
IN
= 7.5V
5.45 T
A
= 25°C
R1 = 330k
5.40 R2 = 100k
5.35
5.30
DRV
CC
DROPOUT VOLTAGE (mV)
DRV
CC
(V)
DRV
CC
(V)
5.30
5.25
5.20
5.15
5.10
5.05
5.00
0
20 40 60 80 100 120 140 160 180 200
I
LOAD
(mA)
4441 G07
OUT Pin Pull-Down Resistance vs
Temperature
0.8
OUT PIN PULL-DOWN RESISTANCE (Ω)
V
IN
= 7.5V
0.7 DRV
CC
= 5V
0.6
0.5
0.4
0.3
0.2
0.1
0
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
t
PLH
, t
PHL
(ns)
t
PLH
t
PLH
, t
PHL
(ns)
4
U W
4441 G04
4441 G10
SD Pin Input Threshold Voltage
vs Temperature
0.80
V
IN
= 7.5V
0.75 DRV
CC
= 5V
0.70
5.50
DRV
CC
Voltage vs Temperature
R1 = 330k
5.45 R2 = 100k
5.40
5.35
5.30
5.25
5.20
5.15
5.10
5.05
5.00
–50
–25
0
50
75
25
TEMPERATURE (°C)
100
125
V
IN
= 25V
V
IN
= 7.5V
4441 G05
4441 G06
DRV
CC
Line Regulation
T
A
= 25°C
R1 = 330k
5.25 R2 = 100k
5.20
5.15
5.10
5.05
5.00
DRV
CC
Dropout Voltage vs
Temperature
1000
V
IN
= 7.5V
900 DRV
CC
= 5V
= 40mA
I
800
LOAD
700
600
500
400
300
200
100
0
5
10
15
V
IN
(V)
20
25
30
4441 G08
0
–50
–25
0
50
75
25
TEMPERATURE (°C)
100
125
4441 G09
t
PLH
, t
PHL
vs DRV
CC
60
50
40
30
t
PHL
20
10
0
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
DRV
CC
(V)
4441 G11
60
50
40
30
t
PLH
, t
PHL
vs Temperature
DRV
CC
= 5V
C
LOAD
= 4.7nF
T
A
= 25°C
C
LOAD
= 4.7nF
t
PLH
t
PHL
20
10
0
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
4441 G12
44411f
LTC4441/LTC4441-1
TYPICAL PERFOR A CE CHARACTERISTICS
t
PLH
, t
PHL
vs C
LOAD
100
T
A
= 25°C
90 DRV
CC
= 5V
80
70
t
PLH
30
25
RISE/FALL TIME (ns)
RISE/FALL TIME (ns)
t
PLH
, t
PHL
(ns)
60
50
40
30
20
10
0
0
5
10 15 20 25 30 35 40 45 50
C
LOAD
(nF)
4441 G13
t
PHL
200
RISE/FALL Time vs C
LOAD
500
T
A
= 25°C
180 DRV
CC
= 5V
160
RISE/FALL TIME (ns)
BLANKING TIME (ns)
140
120
100
80
60
40
20
0
0
5
10 15 20 25 30 35 40 45 50
C
LOAD
(nF)
4441 G16
350
300
250
200
150
100
50
0
0
100
200
300 400 500
R
BLANK
(kΩ)
600
700
BLANKING TIME (ns)
RISE TIME
FALL TIME
V
IN
Operating Supply Current vs
Temperature
500
EN = 5V
450 IN = 0V
V
IN
SUPPLY CURRENT (µA)
V
IN
SUPPLY CURRENT (µA)
400
350
300
250
200
150
100
50
0
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
V
IN
= 25V
V
IN
= 7.5V
U W
RISE/FALL Time vs DRV
CC
T
A
= 25°C
C
LOAD
= 4.7nF
30
25
20
RISE/FALL Time vs Temperature
DRV
CC
= 5V
C
LOAD
= 4.7nF
20
15
10
5
0
4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0
DRV
CC
(V)
4441 G14
RISE TIME
15
10
FALL TIME
5
0
–50
RISE TIME
FALL TIME
–25
0
50
75
25
TEMPERATURE (°C)
100
125
4441 G15
Blanking Time vs R
BLANK
T
A
= 25°C
450 DRV
CC
= 5V
LTC4441
400
250
Blanking Time vs Temperature
V
IN
= 7.5V
240 DRV
CC
= 5V
LTC4441
230
220
210
200
190
180
170
160
150
–50
–25
0
50
75
25
TEMPERATURE (°C)
100
125
4441 G17
4441 G18
V
IN
Standby Supply Current vs
Temperature
15
EN = 0V
14 IN = 0V
13
12
11
10
9
8
7
6
5
4
3
–50 –25
0
50
75
25
TEMPERATURE (°C)
100
125
V
IN
= 7.5V
V
IN
= 25V
4441 G19
4441 G20
44411f
5
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