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MIC4426/4427/4428
Micrel, Inc.
MIC4426/4427/4428
Dual 1.5A-Peak Low-Side MOSFET Driver
General Description
The MIC4426/4427/4428 family are highly-reliable dual low-
side MOSFET drivers fabricated on a BiCMOS/DMOS process
for low power consumption and high efficiency. These drivers
translate TTL or CMOS input logic levels to output voltage
levels that swing within 25mV of the positive supply or ground.
Comparable bipolar devices are capable of swinging only
to within 1V of the supply. The MIC4426/7/8 is available in
three configurations: dual inverting, dual noninverting, and
one inverting plus one noninverting output.
The MIC4426/4427/4428 are pin-compatible replacements
for the MIC426/427/428 and MIC1426/1427/1428 with im-
proved electrical performance and rugged design (Refer to
the Device Replacement lists on the following page). They
can withstand up to 500mA of reverse current (either polarity)
without latching and up to 5V noise spikes (either polarity)
on ground pins.
Primarily intended for driving power MOSFETs, MIC4426/7/8
drivers are suitable for driving other loads (capacitive, resistive,
or inductive) which require low-impedance, high peak current,
and fast switching time. Other applications include driving
heavily loaded clock lines, coaxial cables, or piezoelectric
transducers. The only load limitation is that total driver power
dissipation must not exceed the limits of the package.
Note See MIC4126/4127/4128 for high power and narrow
pulse applications.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Bipolar/CMOS/DMOS construction
Latch-up protection to >500mA reverse current
1.5A-peak output current
4.5V to 18V operating range
Low quiescent supply current
4mA at logic 1 input
400µA at logic 0 input
Switches 1000pF in 25ns
Matched rise and rall times
7Ω output impedance
<40ns typical delay
Logic-input threshold independent of supply voltage
Logic-input protection to –5V
6pF typical equivalent input capacitance
25mV max. output offset from supply or ground
Replaces MIC426/427/428 and MIC1426/1427/1428
Dual inverting, dual noninverting, and inverting/
noninverting configurations
ESD protection
MOSFET driver
Clock line driver
Coax cable driver
Piezoelectic transducer driver
Applications
Functional Diagram
INVERTING
V
S
0.1mA
0.6mA
OUTA
INA
2kΩ
NONINVERTING
0.1mA
0.6mA
INVERTING
OUTB
INB
2kΩ
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
April 2008
1
M9999-042108
MIC4426/4427/4428
Micrel, Inc.
Ordering Information
Standard
Part Number
Pb-Free
Temperature
Range
–40ºC to +85ºC
–0ºC to +70ºC
–40ºC to +85ºC
–40ºC to +85ºC
–0ºC to +70ºC
–40ºC to +85ºC
–0ºC to +70ºC
–40ºC to +85ºC
–40ºC to +85ºC
–0ºC to +70ºC
–40ºC TO +85ºC
–0ºC to +70ºC
–40ºC to +85ºC
–40ºC to +85ºC
–0ºC to +70ºC
Package
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
8-Pin PDIP
8-Pin PDIP
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
8-Pin PDIP
8-Pin PDIP
8-Pin SOIC
8-Pin SOIC
8-Pin MSOP
8-Pin PDIP
8-Pin PDIP
Configuration
Dual Inverting
Dual Inverting
Dual Inverting
Dual Inverting
Dual Inverting
Dual Non-Inverting
Dual Non-Inverting
Dual Non-Inverting
Dual Non-Inverting
Dual Non-Inverting
Inverting + Non-Inverting
Inverting + Non-Inverting
Inverting + Non-Inverting
Inverting + Non-Inverting
Inverting + Non-Inverting
MIC4426BM
MIC4426CM
MIC4426BMM
MIC4426BN
MIC4426CN
MIC4427BM
MIC4427CM
MIC4427BMM
MIC4427BN
MIC4427CN
MIC4428BM
MIC4428CM
MIC4428BMM
MIC4428BN
MIC4428CN
MIC4426YM
MIC4426ZM
MIC4426YMM
MIC4426YN
MIC4426ZN
MIC4427YM
MIC4427ZM
MIC4427YMM
MIC4427YN
MIC4427ZN
MIC4428YM
MIC4428ZM
MIC4428YMM
MIC4428YN
MIC4428ZN
Note
DESC standard military drawing 5962-88503 available;
MIC4426, CERDIP 8-Pin
SMD#: 5962-8850307PA
MIC4427, CERDIP 8-Pin
SMD#: 5962-8850308PA
MIC4428, CERDIP 8-Pin
SMD#: 5962-8850309PA
Micrel Part Number: 5952-8850307PA
Micrel Part Number: 5952-8850308PA
Micrel Part Number: 5952-8850309PA
MIC426/427/428 Device Replacement
Discontinued Number
MIC426CM
MIC426BM
MIC426CN
MIC426BN
MIC427CM
MIC427BM
MIC427CN
MIC427BN
MIC428CM
MIC428BM
MIC428CN
MIC428BN
Replacement
MIC4426BM
MIC4426BM
MIC4426BN
MIC4426BN
MIC4427BM
MIC4427BM
MIC4427BN
MIC4427BN
MIC4428BM
MIC4428BM
MIC4428BN
MIC4428BN
MIC1426/1427/1428 Device Replacement
Discontinued Number
MIC1426CM
MIC1426BM
MIC1426CN
MIC1426BN
MIC1427CM
MIC1427BM
MIC1427CN
MIC1427BN
MIC1428CM
MIC1428BM
MIC1428CN
MIC1428BN
Replacement
MIC4426BM
MIC4426BM
MIC4426BN
MIC4426BN
MIC4427BM
MIC4427BM
MIC4427BN
MIC4427BN
MIC4428BM
MIC4428BM
MIC4428BN
MIC4428BN
M9999-042108
2
April 2008
MIC4426/4427/4428
Micrel, Inc.
MIC4426
2
A
7
Pin Configuration
MIC4426
NC
1
INA
2
GND
3
INB
4
8
NC
7
OUTA
6
V
S
5
OUTB
MIC4427
NC
1
INA
2
GND
3
INB
4
8
NC
7
OUTA
6
V
S
5
OUTB
2
MIC4427
A
7
MIC4428
NC
1
INA
2
GND
3
INB
4
8
NC
7
OUTA
6
V
S
5
OUTB
2
MIC4428
A
7
4
B
5
4
B
5
4
B
5
Dual
Inverting
Dual
Noninverting
Inverting+
Noninverting
Pin Description
Pin Number
1, 8
2
3
4
5
6
7
Pin Name
NC
INA
GND
INB
OUTB
OUTA
V
S
Pin Function
not internally connected
Control Input A: TTL/CMOS compatible logic input.
Ground
Control Input B: TTL/CMOS compatible logic input.
Output B: CMOS totem-pole output.
Supply Input: +4.5V to +18V
Output A: CMOS totem-pole output.
April 2008
3
M9999-042108
MIC4426/4427/4428
Micrel, Inc.
Absolute Maximum Ratings
(1)
Supply Voltage (V
S
) ..................................................... +22V
Input Voltage (V
IN
) .......................... V
S
+ 0.3V to GND – 5V
Junction Temperature (T
J
) ......................................... 150°C
Storage Temperature ................................ –65°C to +150°C
Lead Temperature (10 sec.) ...................................... 300°C
ESD Rating
(3)
Operating Ratings
(2)
Supply Voltage (V
S
) ...................................... +4.5V to +18V
Temperature Range (T
A
)
(A) ......................................................... –55°C to +125°C
(B) ........................................................... –40°C to +85°C
Package Thermal Resistance
PDIP
θ
JA ..........................................................................
130°C/W
PDIP
θ
JC ............................................................................
42°C/W
SOIC
θ
JA
........................................................... 120°C/W
SOIC
θ
JC
............................................................ 75°C/W
MSOP
θ
JA
......................................................... 250°C/W
Electrical Characteristics
(4)
Symbol
Input
V
IH
V
IL
I
IN
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Current
High Output Voltage
Low Output Voltage
Output Resistance
Peak Output Current
Latch-Up Protection
Rise Time
Fall Time
Delay Tlme
Delay Time
Pulse Width
Power Supply Current
Power Supply Current
withstand reverse current
test Figure 1
test Figure 1
test Flgure 1
test Figure 1
test Figure 1
V
INA
= V
INB
= 3.0V
V
INA
= V
INB
= 0.0V
400
0.6
1.4
1.5
0.18
0.19
4.5
8
0.4
0.6
>500
18
20
15
29
17
19
23
27
30
40
20
40
30
40
50
60
I
OUT
= 10mA, V
S
= 18V
0 ≤ V
IN
≤ V
S
–1
V
S
–0.025
6
8
1.5
2.4
2.4
1.4
1.5
1.1
1.0
0.8
0.8
1
V
V
V
V
µA
V
0.025
10
12
V
Ω
Ω
A
mA
ns
ns
ns
ns
ns
ns
ns
ns
ns
mA
mA
mA
mA
4.5V ≤ V
s
≤ 18V; T
A
= 25°C,
bold
values indicate full specified temperature range; unless noted.
Parameter
Condition
Min
Typ
Max
Units
Output
V
OH
V
OL
R
O
I
PK
I
Switching Time
t
R
t
F
t
D1
t
D2
t
PW
I
S
I
S
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Specification for packaged product only.
Power Supply
M9999-042108
4
April 2008
Microcontroller MCU
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