MIC4426/4427/4428
Micrel
MIC4426/4427/4428
Dual 1.5A-Peak Low-Side MOSFET Driver
Final Information
General Description
The MIC4426/4427/4428 family are highly-reliable dual low-
side MOSFET drivers fabricated on a BiCMOS/DMOS pro-
cess 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 swing-
ing only to within 1V of the supply. The MIC4426/7/8 is
available in three configurations: dual inverting, dual nonin-
verting, 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, resis-
tive, or inductive) which require low-impedance, high peak
current, and fast switching time. Other applications include
driving heavily loaded clock lines, coaxial cables, or piezo-
electric transducers. The only load limitation is that total driver
power dissipation must not exceed the limits of the package.
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
V
S
0.6mA
0.1mA
INVERTING
OUTA
INA
2kΩ
NONINVERTING
0.6mA
0.1mA
INVERTING
OUTB
INB
2kΩ
NONINVERTING
GND
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
September 1999
1
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
Ordering Information
Part Number
MIC4426AM
MIC4426BM
MIC4426BMM
MIC4426BN
MIC4427AM
MIC4427BM
MIC4427BMM
MIC4427BN
MIC4428AM
MIC4428BM
MIC4428BMM
MIC4428BN
Temperature Range
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
8-lead SOIC
8-lead SOIC
8-lead MSOP
8-lead Plastic DIP
8-lead SOIC
8-lead SOIC
8-lead MSOP
8-pin Plastic DIP
8-lead SOIC
8-lead SOIC
8-lead MSOP
8-lead Plastic DIP
Configuration
Dual Inverting
Dual Inverting
Dual Inverting
Dual Inverting
Dual Noninverting
Dual Noninverting
Dual Noninverting
Dual Noninverting
Inverting + Noninverting
Inverting + Noninverting
Inverting + Noninverting
Inverting + Noninverting
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
Pin Configuration
MIC4426
NC 1
INA 2
GND 3
INB 4
8 NC
7 OUTA
6 V
S
5 OUTB
4
B
5
2
A
7
MIC4426
NC 1
INA 2
GND 3
INB 4
MIC4427
8 NC
7 OUTA
6 V
S
5 OUTB
4
2
MIC4427
NC 1
A
7
INA 2
GND 3
B
5
INB 4
MIC4428
8 NC
7 OUTA
6 V
S
5 OUTB
4
2
MIC4428
A
7
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
V
S
OUTA
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.
MIC4426/4427/4428
2
September 1999
MIC4426/4427/4428
Micrel
Absolute Maximum Ratings
(Note 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,
Note 3
Operating Ratings
(Note 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
JC
......................................................... 250°C/W
Electrical Characteristics
4.5V
≤
V
s
≤
18V; T
A
= 25°C,
bold
values indicate full specified temperature range; unless noted.
Symbol
Input
V
IH
V
IL
I
IN
Output
V
OH
V
OL
R
O
I
PK
I
High Output Voltage
Low Output Voltage
Output Resistance
Peak Output Current
Latch-Up Protection
withstand reverse current
>500
I
OUT
= 10mA, V
S
= 18V
6
8
1.5
V
S
–0.025
0.025
10
12
V
V
Ω
Ω
A
mA
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Current
0
≤
V
IN
≤
V
S
–1
2.4
2.4
1.4
1.5
1.1
1.0
0.8
0.8
1
V
V
V
V
µA
Parameter
Condition
Min
Typ
Max
Units
Switching Time
t
R
t
F
t
D1
t
D2
t
PW
Power Supply
I
S
I
S
Note 1.
Note 2.
Note 3.
Rise Time
Fall Time
Delay Tlme
Delay Time
Pulse Width
test Figure 1
test Figure 1
test Flgure 1
test Figure 1
test Figure 1
400
18
20
15
29
17
19
23
27
30
40
20
40
30
40
50
60
ns
ns
ns
ns
ns
ns
ns
ns
ns
Power Supply Current
Power Supply Current
V
INA
= V
INB
= 3.0V
V
INA
= V
INB
= 0.0V
1.4
1.5
0.18
0.19
4.5
8
0.4
0.6
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.
September 1999
3
MIC4426/4427/4428
MIC4426/4427/4428
Micrel
Test Circuits
V
S
= 18V
V
S
= 18V
6
0.1µF
7
4.7µF
2
6
0.1µF
7
4.7µF
INA
2
A
MIC4426
OUTA
1000pF
INA
A
MIC4427
OUTA
1000pF
INB
4
B
5
OUTB
1000pF
INB
4
B
5
OUTB
1000pF
Figure 1a. Inverting Configuration
5V
90%
10%
0V
V
S
90%
OUTPUT
10%
0V
t
D1
t
PW
Figure 2a. Noninverting Configuration
5V
90%
10%
0V
t
PW
t
R
t
D2
2.5V
INPUT
2.5V
INPUT
t
F
t
D2
t
R
V
S
90%
OUTPUT
10%
0V
t
D1
t
F
Figure 1b. Inverting Timing
Figure 2b. Noninverting Timing
MIC4426/4427/4428
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September 1999
MIC4426/4427/4428
Micrel
Electrical Characteristics
Rise and Fall Time vs.
Supply Voltage
70
60
50
TIME (ns)
TIME (ns)
Delay Time vs. Supply Voltage
35
30
25
20
15
10
5
20
0
0
5
10
15
SUPPLY VOLTAGE (V)
20
t
D1
C
L
= 1000pF
T
A
= 25°C
t
D2
TIME (ns)
Rise and Fall Time
vs. Temperature
40
C
L
= 1000pF
V
S
= 18V
30
t
R
20
t
F
C
L
= 1000pF
T
A
= 25°C
40
30
20
10
0
0
5
10
15
SUPPLY VOLTAGE (V)
t
F
t
R
10
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (°C)
Delay Time vs. Temperature
35
t
D2
SUPPLY CURRENT (mA)
Supply Current vs.
Capacitive Load
80
70
60
TIME (ns)
Rise and Fall Time vs.
Capacitive Load
400kHz
1k
T
A
= 25°C
V
S
= 18V
100
t
R
30
25
TIME (ns)
C
L
= 1000pF
V
S
= 18V
T
A
= 25°C
V
S
= 18V
20
15
10
5
0
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (°C)
t
D1
50
40
30
20
10
0
10
100
1000
10000
CAPACITIVE LOAD (pF)
200
kHz
20kHz
t
F
10
1
10
100
1000
10000
CAPACITIVE LOAD (pF)
Supply Current vs. Frequency
30
SUPPLY CURRENT (mA)
High Output vs. Current
1.20
0.96
| V
S
– V
| (V)
OUT
OUTPUT VOLTAGE (V)
Low Output vs. Current
1.20
T
A
= 25°C
0.96
0.72
0.48
15 V
0.24
0
10 V
V
S
= 5V
T
A
= 25°C
C
L
= 1000pF
20
V
S
= 18V
T
A
= 25°C
V
C
= 5V
10 V
0.72
0.48
10 V
10
5V
15 V
0.24
0
0
1
10
100
FREQUENCY (kHz)
1000
0 10 20 30 40 50 60 70 80 90 100
CURRENT SOURCED (mA)
0 10 20 30 40 50 60 70 80 90 100
CURRENT SUNK (mA)
2.5
SUPPLY CURRENT (mA)
Quiescent Power Supply
Current vs. Supply Voltage
SUPPLY CURRENT (µA)
Quiescent Power Supply
Current vs. Supply Voltage
400
300
200
150
100
50
0
NO LOAD
BOTH INPUTS LOGIC "0"
T
A
= 25°C
MAXIMUM PACKAGE
POWER DISSIPATION (mW)
Package Power Dissipation
1250
1000
750
500
250
0
SOIC
2.0
1.5
1.0
0.5
0
0
5
10
15
20
SUPPLY VOLTAGE (V)
NO LOAD
BOTH INPUTS LOGIC "1"
T
A
= 25°C
PDIP
0
5
10
15
SUPPLY VOLTAGE (V)
20
25
50
75
100
125
150
AMBIENT TEMPERATURE (°C)
September 1999
5
MIC4426/4427/4428
