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MIC4420/4429
Micrel, Inc.
MIC4420/4429
6A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4420, MIC4429 and MIC429 MOSFET drivers are
tough, efficient, and easy to use. The MIC4429 and MIC429
are inverting drivers, while the MIC4420 is a non-inverting
driver.
They are capable of 6A (peak) output and can drive the larg-
est MOSFETs with an improved safe operating margin. The
MIC4420/4429/429 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.
MIC4420/4429/429 drivers can replace three or more
discrete components, reducing PCB area requirements,
simplifying product design, and reducing assembly cost.
Modern BiCMOS/DMOS construction guarantees freedom
from latch-up. The rail-to-rail swing capability insures ad-
equate gate voltage to the MOSFET during power up/down
sequencing.
Note: See MIC4120/4129 for high power and narrow
pulse applications.
Features
• CMOS Construction
• Latch-Up Protected: Will Withstand >500mA
Reverse Output Current
• Logic Input Withstands Negative Swing of Up to 5V
• Matched Rise and Fall Times ................................ 25ns
• High Peak Output Current ............................... 6A Peak
• Wide Operating Range ............................... 4.5V to 18V
• High Capacitive Load Drive ............................10,000pF
• Low Delay Time .............................................. 55ns Typ
• Logic High Input for Any Voltage From 2.4V to V
S
• Low Equivalent Input Capacitance (typ) ..................6pF
• Low Supply Current ...............450µA With Logic 1 Input
• Low Output Impedance ......................................... 2.5Ω
• Output Voltage Swing Within 25mV of Ground or V
S
Applications
•
•
•
•
Switch Mode Power Supplies
Motor Controls
Pulse Transformer Driver
Class-D Switching Amplifiers
Functional Diagram
V
S
0.1mA
0.4mA
MIC4429
IN V E R T I N G
OUT
IN
2kΩ
MIC4420
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
M9999-072205
MIC4420/4429
Micrel, Inc.
Part No.
Temperature
Range
0°C to +70°C
–40°C to +85°C
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
0°C to +70°C
0°C to +70°C
–40°C to +85°C
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
0°C to +70°C
Ordering Information
Standard
MIC4420CN
MIC4420BN
MIC4420CM
MIC4420BM
MIC4420BMM
MIC4420CT
MIC4429CN
MIC4429BN
MIC4429CM
MIC4429BM
MIC4429BMM
MIC4429CT
Pb-Free
MIC4420ZN
MIC4420YN
MIC4420ZM
MIC4420YM
MIC4420YMM
MIC4420ZT
MIC4429ZN
MIC4429YN
MIC4429ZM
MIC4429YM
MIC4429YMM
MIC4429ZT
Package
8-Pin PDIP
8-Pin PDIP
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
5-Pin TO-220
8-Pin PDIP
8-Pin PDIP
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
5-Pin TO-220
Configuration
Non-Inverting
Non-Inverting
Non-Inverting
Non-Inverting
Non-Inverting
Non-Inverting
Inverting
Inverting
Inverting
Inverting
Inverting
Inverting
Pin Configurations
VS
1
IN
2
NC
3
GND
4
8
VS
7
OUT
6
OUT
5
GND
Plastic DIP (N)
SOIC (M)
MSOP (MM)
5
4
3
2
1
TO-220-5 (T)
OUT
GND
VS
GND
IN
Pin Description
Pin Number
TO-220-5
1
2, 4
3,
TAB
5
Pin Number
DIP, SOIC, MSOP
2
4, 5
1, 8
6, 7
3
Pin Name
IN
GND
OUT
NC
V
S
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.
M9999-072205
2
July 2005
MIC4420/4429
Micrel, Inc.
Absolute Maximum Ratings
(Notes 1, 2 and 3)
Supply Voltage ...........................................................20V
Input Voltage ............................... V
S
+ 0.3V to GND – 5V
Input Current (V
IN
> V
S
) .......................................... 50mA
Power Dissipation, T
A
≤ 25°C
PDIP ....................................................................960W
SOIC ...............................................................1040mW
5-Pin TO-220 ...........................................................2W
Power Dissipation, T
C
≤ 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
Operating Ratings
Supply Voltage .............................................. 4.5V to 18V
Junction Temperature ............................................. 150°C
Ambient Temperature
C Version ................................................. 0°C to +70°C
B Version ............................................. –40°C to +85°C
Package Thermal Resistance
5-pin TO-220
(θ
JC
) ............................................10°C/W
8-pin MSOP
(θ
JA
) ...........................................250°C/W
Electrical Characteristics:
Symbol
INPUT
V
IH
V
IL
I
IN
V
IN
OUTPUT
V
OH
V
OL
R
O
R
O
I
PK
I
R
High Output Voltage
Low Output Voltage
Output Resistance,
Output Low
Output Resistance,
Output High
Peak Output Current
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
Parameter
(T
A
= 25°C with 4.5V ≤ V
S
≤ 18V unless otherwise specified. Note 4.)
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)
–10
V
S
–0.025
1.7
1.5
6
>500
Typ
1.4
1.1
0.8
V
S
+ 0.3
10
Max
Units
V
V
V
µA
V
0.025
2.8
2.5
V
Ω
Ω
A
mA
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
Test Figure 1, C
L
= 2500 pF
Test Figure 1
Test Figure 1
V
IN
= 3 V
V
IN
= 0 V
Test Figure 1, C
L
= 2500 pF
12
13
18
48
0.45
90
4.5
35
35
75
75
1.5
150
18
ns
ns
ns
ns
mA
µA
V
POWER SUPPLY
July 2005
3
M9999-072205
MIC4420/4429
Micrel, Inc.
Conditions
Min
2.4
0.8
–5
0V ≤ V
IN
≤ V
S
Figure 1
Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
–10
V
S
–0.025
3
2.3
V
S
+ 0.3
10
Typ
Max
Units
V
V
V
µA
V
0.025
5
5
V
Ω
Ω
Electrical Characteristics:
(T
A
= –55°C to +125°C with 4.5V ≤ V
S
≤ 18V unless otherwise specified.)
Symbol
INPUT
V
IH
V
IL
I
IN
V
IN
OUTPUT
V
OH
V
OL
R
O
R
O
High Output Voltage
Low Output Voltage
Output Resistance,
Output Low
Output Resistance,
Output High
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
Figure 1, C
L
= 2500pF
Figure 1
Figure 1
V
IN
= 3V
V
IN
= 0V
Figure 1, C
L
= 2500pF
32
34
50
65
0.45
0.06
4.5
60
60
100
100
3.0
0.4
18
ns
ns
ns
ns
mA
mA
V
POWER SUPPLY
Note 1:
Note 2:
Note 3:
Note 4:
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
0.1µF
V
S
= 18V
0.1µF
1.0µF
V
S
= 18V
0.1µF
0.1µF
1.0µF
IN
MIC4429
OUT
2500pF
IN
MIC4420
OUT
2500pF
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
M9999-072205
Figure 2. Noninverting Driver Switching Time
4
July 2005
Embedded System
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