Replacement of
A7900
MIK7900
1.5 A Negative
Voltage Regulator
October 1994-revised September 2002
Description
This series of fixed-negative-voltage monolithic integrated-circuit voltage regulators is designed to complement Series MIK7800 in a
wide range of applications. These applications include on-card regulation for elimination of noise and distribution problems associated
with single point regulation. Each of these regulators can deliver up to 1.5 amperes of output current. The internal current limiting and
thermal shutdown features of these regulators make them essentially immune to overload. In addition to use as fixed-voltage regulators,
these devices can be used with external components to obtain adjustable output voltages and current and also as the power pass
element in precision regulators.
Features
3-Terminal Regulators
Output Current Up to 1.5 A
No External Components
Internal Thermal Overload Protection
High Power Dissipation Capability
Internal Short-Circuit Current Limiting
Output Transistor Safe Area Compensation
Package information
Package TO-220
(top view)
Typical application data 1.5 A
regulator
When using a negative regulator, bypass capacitors are a
must on both the input and output. Recommended values are
2 F on the input and 1 F on the output. It is considered good
practice to include a 0.1 F capacitor on the output to improve
the transient response (Fig. 1). These capacitors may mylar,
ceramic, or tantalum, provided that they have good high
frequency characteristics.
MIK7900
$V
IN
$Vout
2F
0.1 F
1 F
3
2
1
Figure 1. Negative Regulator
Absolute maximum ratings
over operating temperature range (unless otherwise noted)
Parameter Maximum
Units
MIK7924 -40
Input voltage
All others
-35
V
Continuous total dissipation at 25
C free-air temperature
2
Continuous total dissipation at (or bellow) 25
C case temperature
15
W
Operating free-air, case, or virtual junctions temperature range
0 to 150
Storage temperature range
-65 to 150
Lead temperature 3.2 mm (1/8 inch) from case for 10 seconds
260
C
Recommended operating conditions
Parameter Min
Max
Units
MIK7905 -7
-25
MIK7906 -8
-25
MIK7908 -10.5
-25
MIK7912 -14.5
-30
MIK7915 -17.5
-30
MIK7918 -21
-33
Input voltage V
I
MIK7924 -27
-38
V
Output current, I
O
1.5
A
Operating virtual junction temperature, T
J
0
125
C
Page 1 of 5
Replacement of
A7900
MIK7900
1.5 A Negative
Voltage Regulator
October 1994-revised September 2002
Device Selection Guide
Device Output
Voltage
MIK7905 -5V
MIK7906 -6V
MIK7908 -8V
MIK7912 -12V
MIK7915 -15V
MIK7918 -18V
MIK7924 -24V
Electrical characteristics MIK7905
Electrical characteristics at specified virtual junction temperature, V
I
= -10V, I
O
= 500mA (unless otherwise noted)
MIK7905
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-4.8 -5 -5.2
Output voltage**
I
O
= 5mA to 1A,
V
I
= -7V to -20V, P
15W
0
C to 125C
-4.75 -5 -5.25
V
V
I
= -7V to -25V
12.5
50
Input regulation
V
I
= -8V to -12V
25
C
4 15
mV
Ripple rejection
V
I
= -8V to -18V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
15
100
Output regulation
I
O
= 250mA to 750mA
25
C
5 50
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-0.4 mV/
C
Output noise voltage
f= 10 Hz to 100 KHz
25
C
125 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
1.5 2
V
I
= -7V to -25V
0.15
0.5
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.08
0.5
mA
Peak output current
25
C
2.1 A
Electrical characteristics MIK7906
Electrical characteristics at specified virtual junction temperature, V
I
= -11V, I
O
= 500mA (unless otherwise noted)
MIK7906
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-5.75 -6 -6.25
Output voltage**
I
O
= 5mA to 1A,
V
I
= -8V to -21V, P
15W
0
C to 125C
-5.7 -6 -6.3
V
V
I
= -8V to -25V
12.5
120
Input regulation
V
I
= -9V to -13V
25
C
4 60
mV
Ripple rejection
V
I
= -9V to -19V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
15
120
Output regulation
I
O
= 250mA to 750mA
25
C
5 60
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-0.4 mV/
C
Output noise voltage
f= 10 Hz to 100 KHz
25
C
150 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
1.5 2
V
I
= -8V to -25V
0.15
1.3
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.08
0.5
mA
Peak output current
25
C
2.1 A
* Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately.
** This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Page 2 of 5
Replacement of
A7900
MIK7900
1.5 A Negative
Voltage Regulator
October 1994-revised September 2002
Electrical characteristics MIK7908
Electrical characteristics at specified virtual junction temperature, V
I
= -14V, I
O
= 500mA (unless otherwise noted)
MIK7908
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-7.7 -8 -8.3
Output voltage**
I
O
= 5mA to 1A,
V
I
= -10.5V to -23V,
P
15W
0
C to 125C
-7.6 -8 -8.4
V
V
I
= -10.5V to -25V
12.5
160
Input regulation
V
I
= -11V to -17V
25
C
4 80
mV
Ripple rejection
V
I
= -11.5V to -21.5V, f=
120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
15
160
Output regulation
I
O
= 250mA to 750mA
25
C
5 80
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-0.6 mV/
C
Output noise voltage
f= 10Hz to 100 KHz
25
C
200 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
1.5 2
V
I
= -10.5V to -25V
0.15
1
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.08
0.5
mA
Peak output current
25
C
2.1 A
Electrical characteristics MIK7912
Electrical characteristics at specified virtual junction temperature, V
I
= -19V, I
O
= 500mA (unless otherwise noted)
MIK7912
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-11.5 -12 -12.5
Output voltage**
I
O
= 5mA to 1A,
V
I
= -14.5V to -27V,
P
15W
0
C to 125C
-11.4 -12 -12.6
V
V
I
= -14.5V to -30V
5
80
Input regulation
V
I
= -16V to -22V
25
C
3 30
mV
Ripple rejection
V
I
= -15V to -25V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
15
200
Output regulation
I
O
= 250mA to 750mA
25
C
5 75
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-0.8 mV/
C
Output noise voltage
f= 10 Hz to 100 KHz
25
C
300 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
2 3
V
I
= -14.5V to -30V
0.04
0.5
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.06
0.5
mA
Peak output current
25
C
2.1 A
* Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately.
** This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Page 3 of 5
Replacement of
A7900
MIK7900
1.5 A Negative
Voltage Regulator
October 1994-revised September 2002
Electrical characteristics MIK7915
Electrical characteristics at specified virtual junction temperature, V
I
= -23V, I
O
= 500mA (unless otherwise noted)
MIK7915
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-14.4 -15 -15.6
Output voltage**
I
O
= 5mA to 1A,
V
I
= -17.5V to -30V,
P
15W
0
C to 125C
-
14.25
-15 -
15.75
V
V
I
= -17.5V to -30V
5
100
mV
Input regulation
V
I
= -20V to -26V
25
C
3 50
Ripple rejection
V
I
= -18.5V to -28.5V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
15
200
Output regulation
I
O
= 250mA to 750mA
25
C
5 75
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-1
mV/
C
Output noise voltage
f= 10 Hz to 100 KHz
25
C
375 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
2 3
V
I
= -17.5V to -30V
0.04
0.5
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.06
0.5
mA
Peak output current
25
C
2.1 A
Electrical characteristics MIK7918
Electrical characteristics at specified virtual junction temperature, V
I
= -27V, I
O
= 500mA (unless otherwise noted)
MIK7918
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-17.3 -18 -18.7
Output voltage**
I
O
= 5mA to 1A,
V
I
= -21V to -33V, P
15W
0
C to 125C
-17.1 -18 -18.9
V
V
I
= -21V to -33V
5
360
Input regulation
V
I
= -24V to -30V
25
C
3
180
mV
Ripple rejection
V
I
= -22V to -32V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
30
360
mV
Output regulation
I
O
= 250mA to 750mA
25
C
10
180
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-1.0 mV/
C
Output noise voltage
f= 10Hz to 100 KHz
25
C
450 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
2 3
V
I
= -21V to -33V
0.04
1
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.06
0.5
mA
Peak output current
25
C
2.1 A
* Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately.
** This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Page 4 of 5
Replacement of
A7900
MIK7900
1.5 A Negative
Voltage Regulator
October 1994-revised September 2002
Electrical characteristics MIK7924
Electrical characteristics at specified virtual junction temperature, V
I
= -33V, I
O
= 500mA (unless otherwise noted)
MIK7924
Parameter Test
Conditions*
Min Typ Max
Units
25
C
-23 -24 -25
Output voltage**
I
O
= 5mA to 1A,
V
I
= -27V to -38V, P
15W
0
C to 125C
-22.8 -24 -25.2
V
V
I
= -27V to -38V
5
480
Input regulation
V
I
= -30V to -36V
25
C
3
240
mV
Ripple rejection
V
I
= -28V to -38V,
f= 120Hz
0
C to 125C
54 60 dB
I
O
= 5mA to 1.5A
85
480
Output regulation
I
O
= 250mA to 750mA
25
C
25
240
mV
Temperature coefficient of output voltage
I
O
= 5mA
0
C to 125C
-1
mV/
C
Output noise voltage
f= 10Hz to 100 KHz
25
C
600 V
Dropout voltage
I
O
= 1A
25
C
1.1 V
Bias current
25
C
2 3
V
I
= -27V to -38V
0.04
1
Bias current change
I
O
= 5mA to 1A
0
C to 125C
0.06
0.5
mA
Peak output current
25
C
2.1 A
* Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal
effects must be taken into account separately.
** This specification applies only for dc power dissipation permitted by absolute maximum ratings.
Pad Location MIK7900
Chip size 2.0 x 2.0 mm
Pad Location Coordinates
Coordinates (
m)
Pad N
Pad Name
X Y
1 Ground
1530
100
2 Input
725
1710
3 Output
725
990
4 Output
1700
745
Page 5 of 5
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