MIC4423/4424/4425
Micrel, Inc.
MIC4423/4424/4425
Dual 3A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
The MIC4423/4424/4425 family are highly reliable BiCMOS/
DMOS buffer/driver/MOSFET drivers. They are higher out-
put current versions of the MIC4426/4427/4428, which are
improved versions of the MIC426/427/428. All three families
are pin-compatible. The MIC4423/4424/4425 drivers are ca-
pable of giving reliable service in more demanding electrical
environments than their predecessors. They will not latch
under any conditions within their power and voltage ratings.
They can survive up to 5V of noise spiking, of either polarity,
on the ground pin. They can accept, without either damage
or logic upset, up to half an amp of reverse current (either
polarity) forced back into their outputs.
The MIC4423/4424/4425 series drivers are easier to use, more
flexible in operation, and more forgiving than other CMOS
or bipolar drivers currently available. Their BiCMOS/DMOS
construction dissipates minimum power and provides rail-to-
rail voltage swings.
Primarily intended for driving power MOSFETs, the
MIC4423/4424/4425 drivers are suitable for driving other loads
(capacitive, resistive, or inductive) which require low-imped-
ance, high peak currents, and fast switching times. Heavily
loaded clock lines, coaxial cables, or piezoelectric transducers
are some examples. The only known limitation on loading is
that total power dissipated in the driver must be kept within
the maximum power dissipation limits of the package.
Note: See MIC4123/4124/4125 for high power and narrow
pulse applications.
Features
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Reliable, low-power bipolar/CMOS/DMOS construction
Latch-up protected to >500mA reverse current
Logic input withstands swing to –5V
High 3A-peak output current
Wide 4.5V to 18V operating range
Drives 1800pF capacitance in 25ns
Short <40ns typical delay time
Delay times consistent with in supply voltage change
Matched rise and fall times
TTL logic input independent of supply voltage
Low equivalent 6pF input capacitance
Low supply current
3.5mA with logic-1 input
350µA with logic-0 input
Low 3.5Ω typical output impedance
Output voltage swings within 25mV of ground or V
S
.
‘426/7/8-, ‘1426/7/8-, ‘4426/7/8-compatible pinout
Inverting, noninverting, and differential configurations
Functional Diagram
0.6mA
V
S
IN V E R T I N G
0.1mA
Integrated Component Count:
4 Resistors
4 Capacitors
52 Transistors
OUTA
INA
2kΩ
NONINVERTING
0.1mA
0.6mA
IN V E R T I N G
OUTB
INB
2kΩ
NONINVERTING
GND
Ground Unused Inputs
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
MIC4423/4424/4425
MIC4423/4424/4425
Micrel, Inc.
Absolute Maximum Ratings
(Note 1)
Supply Voltage ........................................................... +22V
Input Voltage .................................. V
S
+ 0.3V to GND – 5V
Junction Temperature ................................................150°C
Storage Temperature Range ......................–65°C to 150°C
Lead Temperature (10 sec.) ......................................300°C
ESD Susceptability,
Note 3
..................................... 1000V
Operating Ratings
(Note 2)
Supply Voltage (V
S
) ......................................+4.5V to +18V
Temperature Range
C Version ....................................................0°C to +70°C
B Version ................................................–40°C to +85°C
Package Thermal Resistance
DIP
θ
JA
............................................................. 130°C/W
DIP
θ
JC
............................................................... 42°C/W
Wide-SOIC
θ
JA
................................................. 120°C/W
Wide-SOIC
θ
JC
................................................... 75°C/W
SOIC
θ
JA
........................................................... 120°C/W
SOIC
θ
JC
............................................................ 75°C/W
MIC4423/4424/4425 Electrical Characteristics
(Note 5)
4.5V ≤ V
S
≤ 18V; T
A
= 25°C,
bold
values indicate –40°C ≤ T
A
≤ +85°C; unless noted.
Symbol
Input
V
IH
V
IL
I
IN
Output
V
OH
V
OL
R
O
High Output Voltage
Low Output Voltage
Output Resistance HI State
Output Resistance LO State
I
PK
I
Peak Output Current
Latch-Up Protection
Withstand Reverse Current
Rise Time
Fall Time
Delay Tlme
Delay Time
Pulse Width
Power Supply Current
Power Supply Current
test Figure 1, C
L
= 1800pF
test Figure 1, C
L
= 1800pF
test Ffigure 1, C
L
= 1800pF
test Figure 1, C
L
= 1800pF
test Figure 1
V
IN
= 3.0V (both inputs)
V
IN
= 0.0V (both inputs)
400
1.5
2
0.15
0.2
2.5
3.5
0.25
0.3
>500
I
OUT
= 10mA, V
S
= 18V
V
IN
= 0.8V, I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
V
IN
= 2.4V, I
OUT
= 10mA, V
S
= 18V
V
S
–0.025
2.8
3.7
3.5
4.3
3
V
0.025
5
8
5
8
V
Ω
Ω
Ω
Ω
A
mA
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Current
0V ≤ V
IN
≤ V
S
–1
–10
2.4
0.8
1
10
V
V
µA
µA
Parameter
Conditions
Min
Typ
Max
Units
Switching Time (Note 4)
t
R
t
F
t
D1
t
D2
t
PW
Power Supply
I
S
I
S
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
23
28
25
32
33
32
38
38
35
60
35
60
75
100
75
100
ns
ns
ns
ns
ns
ns
ns
ns
ns
mA
mA
mA
mA
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. ESD tested to human body model, 1.5k in series with 100pF.
Switching times guaranteed by design.
Specification for packaged product only.
July 2005
3
MIC4423/4424/4425
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