MIC4420/4429
Micrel
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
largest MOSFETs with an improved safe operating mar-
gin. 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 electro-
static discharge.
MIC4420/4429/429 drivers can replace three or more dis-
crete 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.
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
0.4mA
0.1mA
MIC4429
INVERTING
OUT
IN
2kΩ
MIC4420
NON-INVERTING
GND
5-32
April 1998
MIC4420/4429
Micrel
Ordering Information
Part No.
MIC4420CN
MIC4420BN
MIC4420CM
MIC4420BM
MIC4420BMM
MIC4420CT
MIC4429CN
MIC4429BN
MIC4429CM
MIC4429BM
MIC4429BMM
MIC4429CT
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
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
5
Plastic DIP (N)
SOIC (M)
MSOP (MM)
5
4
3
2
1
OUT
GND
VS
GND
IN
TAB
TO-220-5 (T)
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
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.
April 1998
5-33
MIC4420/4429
Micrel
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
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
V
IN
I
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.)
Conditions
Min
Typ
Max
Units
2.4
1.4
1.1
0.8
V
S
+ 0.3
10
V
V
V
µA
–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 5)
>500
1.7
1.5
6
–10
V
S
–0.025
0.025
2.8
2.5
V
V
Ω
Ω
A
mA
Latch-Up Protection
Withstand Reverse Current
SWITCHING TIME
(Note 3)
t
R
t
F
t
D1
t
D2
I
S
V
S
Rise Time
Fall Time
Delay Time
Delay Time
Test Figure 1, C
L
= 2500 pF
Test Figure 1, C
L
= 2500 pF
Test Figure 1
Test Figure 1
12
13
18
48
35
35
75
75
ns
ns
ns
ns
POWER SUPPLY
Power Supply Current
Operating Input Voltage
V
IN
= 3 V
V
IN
= 0 V
4.5
0.45
90
1.5
150
18
mA
µA
V
5-34
April 1998
MIC4420/4429
Micrel
Electrical Characteristics:
(T
A
= –55°C to +125°C 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 Low
Output Resistance,
Output High
Figure 1
Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
3
2.3
V
S
–0.025
0.025
5
5
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
0.8
V
S
+ 0.3
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:
Rise Time
Fall Time
Delay Time
Delay Time
Figure 1, C
L
= 2500pF
Figure 1, C
L
= 2500pF
Figure 1
Figure 1
32
34
50
65
60
60
100
100
ns
ns
ns
ns
POWER SUPPLY
Power Supply Current
Operating Input Voltage
V
IN
= 3V
V
IN
= 0V
4.5
0.45
0.06
3.0
0.4
18
mA
mA
V
5
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
V
S
= 18V
0.1µF
1.0µF
0.1µF
0.1µF
0.1µF
1.0µF
IN
MIC4429
OUT
2500pF
IN
MIC4420
OUT
2500pF
INPUT
5V
90%
10%
0V
V
S
90%
t
D1
t
PW
2.5V
t
PW
≥
0.5µs
t
F
t
D2
t
R
INPUT
5V
90%
10%
0V
V
S
90%
t
D1
t
PW
t
R
2.5V
t
PW
≥
0.5µs
t
D2
t
F
OUTPUT
10%
0V
OUTPUT
10%
0V
Figure 1a. Inverting Driver Switching Time
Figure 1b. Noninverting Driver Switching Time
April 1998
5-35
MIC4420/4429
Micrel
Typical Characteristic Curves
Rise Time vs. Supply Voltage
60
50
40
TIME (ns)
Fall Time vs. Supply Voltage
50
Rise and Fall Times vs. Temperature
25
C
L
= 2200 pF
V
S
= 18V
40
20
C
L
= 10,000 pF
TIME (ns)
C
L
= 10,000 pF
TIME (ns)
30
15
30
t
FALL
t
RISE
C
L
= 4700 pF
20
20
C
L
= 4700 pF
C
L
= 2200 pF
10
C
L
= 2200 pF
10
0
10
5
5
7
9
11
V
S
(V)
13
15
0
5
7
9
11
V
S
(V)
13
15
0
–60
–20
20
60
100
TEMPERATURE (°C)
140
Rise Time vs. Capacitive Load
50
40
30
TIME (ns)
Fall Time vs. Capacitive Load
50
40
Delay Time vs. Supply Voltage
60
50
30
DELAY TIME (ns)
TIME (ns)
t
D2
40
30
20
t
D1
10
20
V
S
= 5V
20
V
S
= 5V
V
S
= 12V
V
S
= 18V
V
S
= 12V
10
V
S
= 18V
10
5
1000
3000
CAPACITIVE LOAD (pF)
10,000
5
1000
3000
CAPACITIVE LOAD (pF)
10,000
0
4
6
8
10
12 14 16
SUPPLY VOLTAGE (V)
18
Propagation Delay Time
vs. Temperature
60
Supply Current vs. Capacitive Load
84
V
S
= 15V
I
S
– SUPPLY CURRENT (mA)
Supply Current vs. Frequency
1000
C
L
= 2200 pF
SUPPLY CURRENT (mA)
50
TIME (ns)
t
D2
70
56
42
18V
100
10V
5V
40
30
t
D1
500 kHz
28
10
20
C
L
= 2200 pF
V
S
= 18V
200 kHz
14
20 kHz
0
10
–60
0
0
100
1000
CAPACITIVE LOAD (pF)
10,000
–20
20
60
100
TEMPERATURE (°C)
140
0
100
1000
FREQUENCY (kHz)
10,000
5-36
April 1998
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