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MIC4421/4422
Micrel, Inc.
MIC4421/4422
9A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS
Process
General Description
MIC4421 and MIC4422 MOSFET drivers are rugged, ef-
ficient, and easy to use. The MIC4421 is an inverting driver,
while the MIC4422 is a non-inverting driver.
Both versions are capable of 9A (peak) output and can drive
the largest MOSFETs with an improved safe operating mar-
gin. The MIC4421/4422 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.
MIC4421/4422 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 ...............................9A Peak
• Wide Operating Range .............................. 4.5V to 18V
• High Capacitive Load Drive ........................... 47,000pF
• Low Delay Time .............................................30ns Typ.
• Logic High Input for Any Voltage from 2.4V to V
S
• Low Equivalent Input Capacitance (typ) ................. 7pF
• Low Supply Current .............. 450µA With Logic 1 Input
• Low Output Impedance .........................................1.5Ω
• Output Voltage Swing to Within 25mV of GND or V
S
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
MIC4421
IN V E R T I N G
OUT
IN
2kΩ
MIC4422
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
August 2005
1
M9999-081005
MIC4421/4422
Micrel, Inc.
Ordering Information
Part Number
Standard
PbFree
MIC4421BM
MIC4421YM
MIC4421BN
MIC4421YN
MIC4421CM
MIC4421ZM
MIC4421CN
MIC4421ZN
MIC4421CT
MIC4421ZT
MIC4422BM
MIC4422YM
MIC4422BN
MIC4422YN
MIC4422CM
MIC4422ZM
MIC4422CN
MIC4422CT
MIC4422ZN
MIC4422ZT
Configuration
Inverting
Inverting
Inverting
Inverting
Inverting
Non-inverting
Non-inverting
Non-inverting
Non-inverting
Non-inverting
Temp. Range
–40ºC to +85ºC
–40ºC to +85ºC
–0ºC to +70ºC
–0ºC to +70ºC
–0ºC to +70ºC
–40ºC to +85ºC
–40ºC to +85ºC
–0ºC to +70ºC
–0ºC to +70ºC
–0ºC to +70ºC
Package
8-pin SOIC
8-pin DIP
8-pin SOIC
8-pin DIP
5-pin TO-220
8-pin SOIC
8-pin DIP
8-pin SOIC
8-pin DIP
5-pin TO-220
Pin Configurations
VS
1
IN
2
NC
3
GND
4
8
VS
7
OUT
6
OUT
5
GND
Plastic DIP (N)
SOIC (M)
5
4
3
2
1
OUT
GND
VS
GND
IN
TO-220-5 (T)
Pin Description
Pin Number
TO-220-5
1
2, 4
3,
TAB
5
Pin Number
DIP, SOIC
2
4, 5
1, 8
6, 7
3
Pin Name
IN
GND
V
S
OUT
NC
Pin Function
Control Input
Ground: Duplicate pins must be externally connected together.
Supply Input: Duplicate pins must be externally connected together.
Output: Duplicate pins must be externally connected together.
Not connected.
M9999-081005
2
August 2005
MIC4421/4422
(Notes 1, 2 and 3)
Supply Voltage .............................................................. 20V
Input Voltage ...................................V
S
+ 0.3V to GND – 5V
Input Current (V
IN
> V
S
) .............................................. 50 mA
Power Dissipation, T
A
≤ 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 ................................................................ 8.3mW/°C
5-Pin TO-220 .................................................... 17mW/°C
Storage Temperature ................................ –65°C to +150°C
Lead Temperature (10 sec) ....................................... 300°C
Micrel, Inc.
Absolute Maximum Ratings
Operating Ratings
Junction Temperature ................................................ 150°C
Ambient Temperature
C Version .................................................... 0°C to +70°C
B Version ................................................ –40°C to +85°C
Thermal Resistance
5-Pin TO-220
(θ
JC
) ............................................... 10°C/W
Electrical Characteristics:
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
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
Parameter
(T
A
= 25°C with 4.5 V ≤ V
S
≤ 18 V unless otherwise specified.)
Conditions
Min
2.4
–5
0 V ≤ V
IN
≤ V
S
See Figure 1
See Figure 1
I
OUT
= 10 mA, V
S
= 18 V
I
OUT
= 10 mA, V
S
= 18 V
V
S
= 18 V (See Figure 6)
2
Duty Cycle ≤ 2%
t ≤ 300 µs
Test Figure 1, C
L
= 10,000 pF
Test Figure 1, C
L
= 10,000 pF
Test Figure 1
Test Figure 1
V
IN
= 3 V
V
IN
= 0 V
4.5
>1500
0.6
0.8
9
1.7
–10
V
S
–.025
0.025
Typ
1.3
1.1
0.8
V
S
+0.3
10
Max
Units
V
V
V
µA
V
V
Ω
Ω
A
A
mA
Continuous Output Current
Latch-Up Protection
Withstand Reverse Current
Rise Time
Fall Time
Delay Time
Delay Time
Power Supply Current
Operating Input Voltage
SWITCHING TIME
(Note 3)
t
R
t
F
t
D1
t
D2
I
S
V
S
20
24
15
35
0.4
80
75
75
60
60
1.5
150
18
ns
ns
ns
ns
mA
µA
V
POWER SUPPLY
August 2005
3
M9999-081005
MIC4421/4422
Micrel, Inc.
(Over operating temperature range with 4.5V ≤ V
S
≤ 18V unless otherwise specified.)
Conditions
Min
2.4
–5
0V ≤ V
IN
≤ V
S
Figure 1
Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
0.8
1.3
–10
V
S
–.025
0.025
3.6
2.7
Typ
1.4
1.0
0.8
V
S
+0.3
10
Max
Units
V
V
V
µA
V
V
Ω
Ω
Electrical Characteristics:
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
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
Parameter
SWITCHING TIME
(Note 3)
t
R
t
F
t
D1
t
D2
I
S
V
S
Note 1:
Note 2:
Note 3:
Figure 1, C
L
= 10,000pF
Figure 1, C
L
= 10,000pF
Figure 1
Figure 1
V
IN
= 3V
V
IN
= 0V
4.5
23
30
20
40
0.6
0.1
120
120
80
80
3
0.2
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.
Test Circuits
V
S
= 18V
0.1µF
V
S
= 18V
0.1µF
4.7µF
0.1µF
0.1µF
4.7µF
IN
MIC4421
OUT
15000pF
IN
MIC4422
OUT
15000pF
INPUT
5V
90%
10%
0V
2.5V
t
P W
≥ 0.5µs
t
D1
INPUT
5V
90%
10%
0V
2.5V
t
P W
≥ 0.5µs
t
D1
t
P W
V
S
90%
t
F
t
D2
t
R
t
P W
V
S
90%
t
R
t
D2
t
F
O U TPU T
10%
0V
O U TPU T
10%
0V
Figure 1. Inverting Driver Switching Time
M9999-081005
Figure 2. Noninverting Driver Switching Time
4
August 2005
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