5-32
April 1998
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 .............. 450
A With Logic 1 Input
Low Output Impedance ......................................... 2.5
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
IN
OUT
MIC4429
INVERTING
MIC4420
NON-INVERTING
0.1mA
0.4mA
2k
V
S
GND
April 1998
5-33
MIC4420/4429
Micrel
5
Ordering Information
Part No.
Temperature Range
Package
Configuration
MIC4420CN
0
C to +70
C
8-Pin PDIP
Non-Inverting
MIC4420BN
40
C to +85
C
8-Pin PDIP
Non-Inverting
MIC4420CM
0
C to +70
C
8-Pin SOIC
Non-Inverting
MIC4420BM
40
C to +85
C
8-Pin SOIC
Non-Inverting
MIC4420BMM
40
C to +85
C
8-Pin MSOP
Non-Inverting
MIC4420CT
0
C to +70
C
5-Pin TO-220
Non-Inverting
MIC4429CN
0
C to +70
C
8-Pin PDIP
Inverting
MIC4429BN
40
C to +85
C
8-Pin PDIP
Inverting
MIC4429CM
0
C to +70
C
8-Pin SOIC
Inverting
MIC4429BM
40
C to +85
C
8-Pin SOIC
Inverting
MIC4429BMM
40
C to +85
C
8-Pin MSOP
Inverting
MIC4429CT
0
C to +70
C
5-Pin TO-220
Inverting
Pin Configurations
1
2
3
4
8
7
6
5
VS
OUT
OUT
GND
VS
IN
NC
GND
Plastic DIP (N)
SOIC (M)
MSOP (MM)
TAB
5
OUT
4
GND
3
VS
2
GND
1
IN
TO-220-5 (T)
Pin Description
Pin Number
Pin Number
Pin Name
Pin Function
TO-220-5
DIP, SOIC, MSOP
1
2
IN
Control Input
2, 4
4, 5
GND
Ground: Duplicate pins must be externally connected together.
3,
TAB
1, 8
V
S
Supply Input: Duplicate pins must be externally connected together.
5
6, 7
OUT
Output: Duplicate pins must be externally connected together.
3
NC
Not connected.
5-34
April 1998
MIC4420/4429
Micrel
Electrical Characteristics:
(T
A
= 25
C with 4.5V
V
S
18V unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
INPUT
V
IH
Logic 1 Input Voltage
2.4
1.4
V
V
IL
Logic 0 Input Voltage
1.1
0.8
V
V
IN
Input Voltage Range
5
V
S
+ 0.3
V
I
IN
Input Current
0 V
V
IN
V
S
10
10
A
OUTPUT
V
OH
High Output Voltage
See Figure 1
V
S
0.025
V
V
OL
Low Output Voltage
See Figure 1
0.025
V
R
O
Output Resistance,
I
OUT
= 10 mA, V
S
= 18 V
1.7
2.8
Output Low
R
O
Output Resistance,
I
OUT
= 10 mA, V
S
= 18 V
1.5
2.5
Output High
I
PK
Peak Output Current
V
S
= 18 V (See Figure 5)
6
A
I
R
Latch-Up Protection
>500
mA
Withstand Reverse Current
SWITCHING TIME (Note 3)
t
R
Rise Time
Test Figure 1, C
L
= 2500 pF
12
35
ns
t
F
Fall Time
Test Figure 1, C
L
= 2500 pF
13
35
ns
t
D1
Delay Time
Test Figure 1
18
75
ns
t
D2
Delay Time
Test Figure 1
48
75
ns
POWER SUPPLY
I
S
Power Supply Current
V
IN
= 3 V
0.45
1.5
mA
V
IN
= 0 V
90
150
A
V
S
Operating Input Voltage
4.5
18
V
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
(
JC
) .......................................... 10
C/W
8-pin MSOP
(
JA
) .......................................... 250
C/W
April 1998
5-35
MIC4420/4429
Micrel
5
Figure 1a. Inverting Driver Switching Time
IN
MIC4429
OUT
2500pF
V
S
= 18V
0.1F
1.0F
0.1F
IN
MIC4420
OUT
2500pF
V
S
= 18V
0.1F
1.0F
0.1F
t
D1
90%
10%
t
F
10%
0V
5V
t
D2
t
R
V
S
OUTPUT
INPUT
90%
0V
t
PW
0.5s
2.5V
t
PW
90%
10%
t
R
10%
0V
5V
t
F
V
S
OUTPUT
INPUT
90%
0V
t
PW
0.5s
t
D1
t
D2
t
PW
2.5V
Figure 1b. Noninverting Driver Switching Time
Test Circuits
Electrical Characteristics:
(T
A
= 55
C to +125
C with 4.5V
V
S
18V unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
INPUT
V
IH
Logic 1 Input Voltage
2.4
V
V
IL
Logic 0 Input Voltage
0.8
V
V
IN
Input Voltage Range
5
V
S
+ 0.3
V
I
IN
Input Current
0V
V
IN
V
S
10
10
A
OUTPUT
V
OH
High Output Voltage
Figure 1
V
S
0.025
V
V
OL
Low Output Voltage
Figure 1
0.025
V
R
O
Output Resistance,
I
OUT
= 10mA, V
S
= 18V
3
5
Output Low
R
O
Output Resistance,
I
OUT
= 10mA, V
S
= 18V
2.3
5
Output High
SWITCHING TIME (Note 3)
t
R
Rise Time
Figure 1, C
L
= 2500pF
32
60
ns
t
F
Fall Time
Figure 1, C
L
= 2500pF
34
60
ns
t
D1
Delay Time
Figure 1
50
100
ns
t
D2
Delay Time
Figure 1
65
100
ns
POWER SUPPLY
I
S
Power Supply Current
V
IN
= 3V
0.45
3.0
mA
V
IN
= 0V
0.06
0.4
mA
V
S
Operating Input Voltage
4.5
18
V
NOTE 1:
Functional operation above the absolute maximum stress ratings is not implied.
NOTE 2:
Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
NOTE 3:
Switching times guaranteed by design.
5-36
April 1998
MIC4420/4429
Micrel
Typical Characteristic Curves
30
20
10
5
1000
10,000
CAPACITIVE LOAD (pF)
TIME (ns)
V = 18V
S
Fall Time vs. Capacitive Load
40
50
V = 12V
S
V = 5V
S
60
50
40
30
20
10
60
20
20
60
100
140
TEMPERATURE (C)
TIME (ns)
D1
t
D2
t
Propagation Delay Time
vs. Temperature
0
100
1000
10,000
CAPACITIVE LOAD (pF)
I SUPPLY CURRENT (mA)
S
Supply Current vs. Capacitive Load
C = 2200 pF
L
V = 18V
S
84
70
56
42
28
14
0
500 kHz
200 kHz
20 kHz
V = 15V
S
60
50
40
30
20
10
0
DELAY TIME (ns)
4
6
8
10
12
14
16
18
SUPPLY VOLTAGE (V)
Delay Time vs. Supply Voltage
t
D2
t
D1
V = 12V
S
V = 5V
S
30
20
10
5
1000
10,000
CAPACITIVE LOAD (pF)
V = 18V
S
Rise Time vs. Capacitive Load
40
50
TIME (ns)
100
0
0
100
1000
10,000
FREQUENCY (kHz)
SUPPLY CURRENT (mA)
Supply Current vs. Frequency
10
1000
18V
10V
5V
C = 2200 pF
L
60
20
20
60
100
140
TEMPERATURE (C)
5
7
9
11
13
15
V (V)
S
5
7
9
11
13
15
t
RISE
t
25
20
15
10
5
0
TIME (ns)
Rise and Fall Times vs. Temperature
C = 2200 pF
V = 18V
S
FALL
C = 2200 pF
L
60
50
40
30
20
10
0
TIME (ns)
Rise Time vs. Supply Voltage
C = 4700 pF
L
C = 10,000 pF
L
C = 2200 pF
L
TIME (ns)
Fall Time vs. Supply Voltage
C = 4700 pF
L
C = 10,000 pF
L
50
40
30
20
10
0
L
V (V)
S
3000
3000
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