MIC2803/2804
Micrel
6-34
April 1998
MIC2803/2804
High-Voltage High-Current Darlington Array
Not Recommended for New Designs
General
The MIC2803 and MIC2804 are high-voltage, high-current
Darlington arrays ideal for switching high-power loads from
logic-level TTL, CMOS, or PMOS control signals.
The MIC2803/4 Darlington transistor array can be used to
manage multiple loads of up to 50V and 500mA, limited by
package power dissipation.
The MIC2803 features inputs compatible with 5V TTL and
CMOS logic while the MIC2804 features inputs compatible
with 6V to 15V CMOS or PMOS logic outputs.
The MIC2803/4 is available in 18-pin plastic DIP and wide
SOIC packages in the 40
C to +85
C temperature range.
Functional Diagrams
OUT1
OUT2
OUT3
OUT4OUT7
OUT8
MIC2803
MIC2804
4
IN1
IN2
IN3
IN4IN7
IN8
1
18
2
17
3
16
47
1512
8
11
COM
10
GND
9
Features
Output voltage to 50V
Output current to 500mA
Open-collector outputs
Integral clamp diodes
TTL, CMOS, or PMOS compatible inputs
Applications
Relay and solenoid switching
Stepping motor
LED and incandescent displays
Ordering Information
Part Number
Temperature Range
Package
MIC2803BN
40
C to +85
C
18-pin DIP
MIC2803BWM
40
C to +85
C
18-pin wide SOIC
MIC2804BN
40
C to +85
C
18-pin DIP
MIC2804BWM
40
C to +85
C
18-pin wide SOIC
7.2K
3K
COM
IN
OUT
2.7k
Typical MIC2803 Darlington Driver
7.2K
3K
COM
IN
OUT
10.5k
Typical MIC2804 Darlington Driver
April 1998
6-35
MIC2803/2804
Micrel
6
Pin Configuration
2
IN2
OUT2
17
3
IN3
OUT3
16
4
IN4
OUT4
15
5
IN5
OUT5
14
6
IN6
OUT6
13
7
IN7
OUT7
12
1
IN1
OUT1
18
8
IN8
OUT8
11
9
GND
COM
10
18-Pin DIP (N)
18-Pin Wide SOIC (WM)
Pin Number
Pin Name
Pin Function
18
IN1IN8
Input 1 through Input 8: Base drive to Darlington transistor via current
limiting resistor.
9
GND
Ground
10
COM
Clamp Diode Common
1118
OUT8OUT1
Output 8 through Output 1: Open collector output of Darlington transistor.
Pin Description
MIC2803/2804
Micrel
6-36
April 1998
Absolute Maximum Ratings
Output Voltage (V
CE
) .................................................... 50V
Continuous Output Current (I
C
) ................................ 500mA
Input Voltage (V
IN
) ........................................................ 30V
Continuous Input Current (I
IN
) .................................... 25mA
Storage Temperature (T
S
) ....................... 65
C to +150
C
Operating Ratings
Ambient Temperature (T
A
) ......................... 40
C to +85
C
Package Thermal Resistance
PDIP
JA
.............................................................. 56
C/W
SOIC
JA
............................................................. 84
C/W
Electrical Characteristics
V
CC
= 50V, T
A
= 25
C, unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
I
CEX
Output Leakage Current
T
A
= +25
C
50
A
T
A
= +70
C
100
A
MIC2804
T
A
= +85
C, V
IN
= 1.0V
500
A
V
CE(sat)
Collector-Emitter Saturation Voltage
I
C
= 100mA, I
IN
= 250
A
0.9
1.1
V
I
C
= 200mA, I
IN
= 350
A
1.1
1.3
V
I
C
= 350mA, I
IN
= 500
A
1.3
1.6
V
I
IN(on)
Input Current
MIC2803
V
IN
= 3.85V
0.93
1.35
mA
MIC2804
V
IN
= 5.0V
0.35
0.5
mA
V
IN
= 12V
1.0
1.45
mA
I
IN(off)
I
C
= 500
A, T
A
= +85
C
50
65
A
V
IN(on)
Input Voltage
MIC2803
V
CE
= 2.0V, I
C
= 200mA
2.4
V
V
CE
= 2.0V, I
C
= 250mA
2.7
V
V
CE
= 2.0V, I
C
= 300mA
3.0
V
MIC2804
V
CE
= 2.0V, I
C
= 125mA
5.0
V
V
CE
= 2.0V, I
C
= 200mA
6.0
V
V
CE
= 2.0V, I
C
= 275mA
7.0
V
V
CE
= 2.0V, I
C
= 350mA
8.0
V
C
IN
Input Capacitance
15
25
pF
t
ON
Turn-On Delay
0.5E
IN
to 0.5E
OUT
0.15
1.0
s
t
OFF
Turn-Off Delay
0.5E
IN
to 0.5E
OUT
0.05
1.0
s
I
R
Clamp Diode Leakage Current
V
R
= 50V, T
A
= +25
C
50
A
V
R
= 50V, T
A
= +85
C
100
A
V
F
Clamp Diode Forward Voltage
I
F
= 350mA
1.7
2.0
V
General Note: Devices are ESD protected; however, handling precautions are recommended.
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