MIC4451/4452
Micrel, Inc.
MIC4451/4452
12A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4451 and MIC4452 CMOS MOSFET drivers are tough,
efficient, and easy to use. The MIC4451 is an inverting driver,
while the MIC4452 is a non-inverting driver.
Both versions are capable of 12A (peak) output and can drive
the largest MOSFETs with an improved safe operating mar-
gin. The MIC4451/4452 accepts any logic input from 2.4V to
V
S
without external speed-up capacitors or resistor networks.
Proprietary circuits allow the input to swing negative by as
much as 5V without damaging the part. Additional circuits
protect against damage from electrostatic discharge.
MIC4451/4452 drivers can replace three or more discrete
components, reducing PCB area requirements, simplifying
product design, and reducing assembly cost.
Modern Bipolar/CMOS/DMOS construction guarantees
freedom from latch-up. The rail-to-rail swing capability of
CMOS/DMOS insures adequate gate voltage to the MOS-
FET during power up/down sequencing. Since these devices
are fabricated on a self-aligned process, they have very low
crossover current, run cool, use little power, and are easy
to drive.
Features
• BiCMOS/DMOS Construction
• Latch-Up Proof: Fully Isolated Process is Inherently
Immune to Any Latch-up.
• Input Will Withstand Negative Swing of Up to 5V
• Matched Rise and Fall Times ............................... 25ns
• High Peak Output Current .............................12A Peak
• Wide Operating Range .............................. 4.5V to 18V
• High Capacitive Load Drive ........................... 62,000pF
• Low Delay Time .............................................30ns Typ.
• Logic High Input for Any Voltage from 2.4V to V
S
• Low Supply Current .............. 450µA With Logic 1 Input
• Low Output Impedance .........................................1.0Ω
• Output Voltage Swing to Within 25mV of GND or V
S
• Low Equivalent Input Capacitance (typ) ................. 7pF
Applications
•
•
•
•
•
•
•
•
Switch Mode Power Supplies
Motor Controls
Pulse Transformer Driver
Class-D Switching Amplifiers
Line Drivers
Driving MOSFET or IGBT Parallel Chip Modules
Local Power ON/OFF Switch
Pulse Generators
Functional Diagram
V
S
0.1mA
0.3mA
MIC4451
INVERTING
OUT
IN
2kΩ
MIC4452
NONINVERTING
GND
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2005
1
MIC4451/4452
MIC4451/4452
Micrel, Inc.
(Notes 1, 2 and 3)
Absolute Maximum Ratings
Operating Ratings
Operating Temperature (Chip) ................................... 150°C
Operating Temperature (Ambient)
C Version .................................................... 0°C to +70°C
B Version ................................................ –40°C to +85°C
Thermal Impedances (To Case)
5-Pin TO-220
(θ
JC
) ............................................... 10°C/W
Supply Voltage .............................................................. 20V
Input Voltage ...................................V
S
+ 0.3V to GND – 5V
Input Current (V
IN
> V
S
) .............................................. 50 mA
Power Dissipation, T
AMBIENT
≤ 25°C
PDIP .................................................................... 960mW
SOIC .................................................................. 1040mW
5-Pin TO-220 .............................................................. 2W
Power Dissipation, T
CASE
≤ 25°C
5-Pin TO-220 ......................................................... 12.5W
Derating Factors (to Ambient)
PDIP ................................................................ 7.7mW/°C
SOIC ............................................................... 8.3 mW/°C
5-Pin TO-220 .................................................... 17mW/°C
Storage Temperature ................................ –65°C to +150°C
Lead Temperature (10 sec) ....................................... 300°C
Electrical Characteristics
(Note 4)
:
(T
A
= 25°C with 4.5 V ≤ V
S
≤ 18 V unless otherwise specified.)
Symbol
INPUT
V
IH
V
IL
V
IN
I
IN
OUTPUT
V
OH
V
OL
R
O
R
O
I
PK
I
DC
I
R
High Output Voltage
Low Output Voltage
Output Resistance,
Output High
Output Resistance,
Output Low
Peak Output Current
Continuous Output Current
Latch-Up Protection
Withstand Reverse Current
Rise Time
Fall Time
Delay Time
Delay Time
Power Supply Current
Operating Input Voltage
Duty Cycle ≤ 2%
t ≤ 300 µs
Test Figure 1, C
L
= 15,000 pF
Test Figure 1, C
L
= 15,000 pF
Test Figure 1
Test Figure 1
V
IN
= 3 V
V
IN
= 0 V
4.5
See Figure 1
See Figure 1
I
OUT
= 10 mA, V
S
= 18V
I
OUT
= 10 mA, V
S
= 18V
V
S
= 18 V (See Figure 6)
2
>1500
0.6
0.8
12
V
S
–.025
.025
1.5
1.5
V
V
Ω
Ω
A
A
mA
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
0 V ≤ V
IN
≤ V
S
–5
–10
2.4
1.3
1.1
0.8
V
S
+.3
10
V
V
V
µA
Parameter
Conditions
Min
Typ
Max
Units
SWITCHING TIME
(Note 3)
t
R
t
F
t
D1
t
D2
I
S
V
S
20
24
15
35
0.4
80
40
50
30
60
1.5
150
18
ns
ns
ns
ns
mA
µA
V
Power Supply
July 2005
3
MIC4451/4452
MIC4451/4452
Micrel, Inc.
Electrical Characteristics:
(Over operating temperature range with 4.5V < V
S
< 18V unless otherwise specified.)
Symbol
INPUT
V
IH
V
IL
V
IN
I
IN
OUTPUT
V
OH
V
OL
R
O
R
O
High Output Voltage
Low Output Voltage
Output Resistance,
Output High
Output Resistance,
Output Low
Rise Time
Fall Time
Delay Time
Delay Time
Power Supply Current
Operating Input Voltage
Figure 1
Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
0.8
1.3
V
S
–.025
0.025
2.2
2.2
V
V
Ω
Ω
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
0V ≤ V
IN
≤ V
S
–5
–10
2.4
1.4
1.0
0.8
V
S
+.3
10
V
V
V
µA
Parameter
Conditions
Min
Typ
Max
Units
SWITCHING TIME
(Note 3)
t
R
t
F
t
D1
t
D2
I
S
V
S
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 4:
Figure 1, C
L
= 15,000pF
Figure 1, C
L
= 15,000pF
Figure 1
Figure 1
V
IN
= 3V
V
IN
= 0V
4.5
23
30
20
40
0.6
0.1
50
60
40
80
3
0.4
18
ns
ns
ns
ns
mA
V
POWER SUPPLY
Functional operation above the absolute maximum stress ratings is not implied.
Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
Switching times guaranteed by design.
Specification for packaged product only.
Test Circuits
V
S
= 18V
0.1µF
OUT
15000pF
V
S
= 18V
1.0µF
0.1µF
IN
MIC4451
0.1µF
IN
MIC4452
0.1µF
OUT
15000pF
1.0µF
INPUT
5V
90%
10%
0V
V
S
90%
t
P W
2.5V
t
P W
≥ 0.5µs
INPUT
5V
90%
10%
0V
V
S
90%
t
D1
t
P W
2.5V
t
P W
≥ 0.5µs
t
D1
t
F
t
D2
t
R
t
R
t
D2
t
F
O U TPU T
O U TPU T
10%
0V
10%
0V
Figure 1. Inverting Driver Switching Time
MIC4451/4452
4
Figure 2. Noninverting Driver Switching Time
July 2005
MIC4451/4452
Micrel, Inc.
Typical Characteristic Curves
Rise Time
vs. Supply Voltage
Fall Time
vs. Supply Voltage
Rise and FallTimes
vs. Temperature
C
L
= 10,000pF
V
S
= 18V
t
FALL
220
200
180
160
140
120
100
80
60
40
20
0
R IS E T IM E (n s )
220
200
180
160
140
120
100
80
60
40
20
0
F A L L T IM E (n s )
60
50
T IM E (n s )
40
30
20
10
47,000pF
47,000pF
22,000pF
10,000pF
4
6
8
10 12 14 16
SUPPLY VOLTAGE (V)
18
22,000pF
10,000pF
4
6
8
10 12 14 16
SUPPLY VOLTAGE (V)
18
t
RISE
0
-40
0
40
80
120
TEMPERATURE (
°C)
300
250
R IS E T IM E (n s )
Rise Time
vs. Capacitive Load
5V
300
250
F A L L T IM E (n s )
Fall Time
vs. Capacitive Load
C R O S S O V E R E N E R G Y (A •s )
10
-7
Crossover Energy
vs. Supply Voltage
PER TRANSITION
200
150
10V
100
50
0
100
1000
10k
CAPACITIVE LOAD (pF)
18V
100k
200
150
100
50
0
100
10V
5V
10
-8
18V
1000
10k
CAPACITIVE LOAD (pF)
100k
10
-9
4
6
8
10 12 14
VOLTAGE (V)
16
18
S U P P L Y C U R R E N T (m A )
S U P P L Y C U R R E N T (m A )
120
90
60
30
0
20
S U P P L Y C U R R E N T (m A )
220
200
180
160
140
120
100
80
60
40
20
0
Supply Current
vs. Capacitive Load
V
S
= 18V
150
Supply Current
vs. Capacitive Load
V
S
= 12V
75
60
45
30
15
0
Supply Current
vs. Capacitive Load
V
S
= 5V
1
z
MH
z
kH
z
20
100
1000
10k
CAPACITIVE LOAD (pF)
100k
100
1000
10k
CAPACITIVE LOAD (pF)
100k
100
1000
10k
CAPACITIVE LOAD (pF)
20
1M
50
50
0k
0k
0k
50
Hz
1M
Hz
kH
H
H
H
180
S U P P L Y C U R R E N T (m A )
Supply Current
vs. Frequency
V
S
= 18V
S U P P L Y C U R R E N T (m A )
120
100
80
60
40
20
0
Supply Current
vs. Frequency
V
S
= 12V
S U P P L Y C U R R E N T (m A )
60
50
40
30
20
10
0
Supply Current
vs. Frequency
V
S
= 5V
0 .0 1
µF
160
140
120
100
80
60
40
20
0
F
F
µF
0 .1 µ
0 .1 µ
0 .0 1
µF
pF
1000
0 .0 1
1000
0 .1 µ
pF
F
10k
100k
1M
FREQUENCY (Hz)
10M
10k
100k
1M
FREQUENCY (Hz)
10M
10k
100k
1M
FREQUENCY (Hz)
1000
pF
kH
z
z
z
July 2005
5
MIC4451/4452
z
100k
10M
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