MC7900 Series
1.0 A Negative Voltage
Regulators
The MC7900 series of fixed output negative voltage regulators are
intended as complements to the popular MC7800 series devices.
These negative regulators are available in the same seven−voltage
options as the MC7800 devices. In addition, one extra voltage option
commonly employed in MECL systems is also available in the
negative MC7900 series.
Available in fixed output voltage options from
−
5.0 V to
−
24 V,
these regulators employ current limiting, thermal shutdown, and
safe−area compensation
−
making them remarkably rugged under
most operating conditions. With adequate heatsinking they can deliver
output currents in excess of 1.0 A.
•
No External Components Required
•
Internal Thermal Overload Protection
•
Internal Short Circuit Current Limiting
•
Output Transistor Safe−Area Compensation
•
Available in 2% Voltage Tolerance (See Ordering Information)
•
Pb−Free Package May be Available. The G−Suffix Denotes a
Pb−Free Lead Finish
Gnd
14.7 k
2.4 k
2.0 k
2.0 k
8.0 k
1.0 k
12 k
1.0 k
4.0 k
1.6 k
R
2
4.0 k
R
1
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TO−220
T SUFFIX
CASE 221AB
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Ground
2. Input
3. Output
D
2
PAK
D2T SUFFIX
CASE 936
1
2
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3.6 k
1.2 k
25
STANDARD APPLICATION
Input
10 k
20 pF
10 pF
10 k
240
0.3
750
V
O
MC79XX
Output
C
O
**
1.0
mF
C
in
*
0.33
mF
2.0 k
1.1 k
20 k
20 k
A common ground is required between the input
and the output voltages. The input voltage must
remain typically 2.0 V above more negative even
during the high point of the input ripple voltage.
XX, These two digits of the type number
indicate nominal voltage.
**
C
in
is required if regulator is located an
appreciable distance from power supply filter.
** C
O
improve stability and transient response.
This device contains 26 active transistors.
V
I
Figure 1. Representative Schematic Diagram
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 14 of this data sheet.
©
Semiconductor Components Industries, LLC, 2013
July, 2013
−
Rev. 18
1
Publication Order Number:
MC7900/D
MC7900 Series
MAXIMUM RATINGS
(T
A
= +25°C, unless otherwise noted.)
Rating
Input Voltage (−5.0 V
≥
V
O
≥
−18
V)
Input Voltage
(24 V)
Power Dissipation
Case 221A
T
A
= +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Case 936 (D
2
PAK)
T
A
= +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Storage Junction Temperature Range
Junction Temperature
Symbol
V
I
Value
−35
−40
Unit
Vdc
P
D
q
JA
q
JC
P
D
q
JA
q
JC
T
stg
T
J
Internally Limited
65
5.0
Internally Limited
70
5.0
−65
to +150
+150
W
°C/W
°C/W
W
°C/W
°C/W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
*This device series contains ESD protection and exceeds the following tests:
Human Body Model 2000 V per MIL_STD_883, Method 3015
Machine Model Method 200 V
MC7905B, MC7905C
ELECTRICAL CHARACTERISTICS
(V
I
=
−10
V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 1)
(T
J
= +25°C, I
O
= 100 mA)
−7.0
Vdc
≥
V
I
≥
−
25 Vdc
−8.0
Vdc
≥
V
I
≥
−12
Vdc
(T
J
= +25°C, I
O
= 500 mA)
−7.0
Vdc
≥
V
I
≥
−
25 Vdc
−8.0
Vdc
≥
V
I
≥
−12
Vdc
Load Regulation, T
J
= +25°C (Note 1)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−7.0
Vdc
≥
V
I
≥
−
20 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−7.0
Vdc
≥
V
I
≥
−
25 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage
I
O
= 1.0 A, T
J
= +25°C
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, Tlow*
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
−4.75
−
−
−
−
−
−
−
7.0
2.0
35
8.0
11
4.0
−
4.3
−
−
40
70
1.3
−1.0
50
25
100
50
mV
100
50
Vdc
−5.25
8.0
1.3
0.5
−
−
−
mV/°C
−
mV
dB
Vdc
mA
mA
Min
−4.8
Typ
−5.0
Max
−5.2
Unit
Vdc
mV
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
1. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
*Tlow =
−40°C
for MC7905B and Tlow = 0°C for MC7905C.
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2
MC7900 Series
MC7905AC
ELECTRICAL CHARACTERISTICS
(V
I
=
−10
V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 2)
−8.0
Vdc
≥
V
I
≥
−12
Vdc; I
O
= 1.0 A, T
J
= +25°C
−8.0
Vdc
≥
V
I
≥
−12
Vdc; I
O
= 1.0 A
−7.5
Vdc
≥
V
I
≥
−
25 Vdc; I
O
= 500 mA
−7.0
Vdc
≥
V
I
≥
−
20 Vdc; I
O
= 1.0 A, T
J
= +25°C
Load Regulation (Note 2)
5.0 mA
≤
I
O
≤
1.5 A, T
J
= +25°C
250 mA
≤
I
O
≤
750 mA
5.0 mA
≤
I
O
≤
1.0 A
Output Voltage
−7.5
Vdc
≥
V
I
≥
−
20 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current
Input Bias Current Change
−7.5
Vdc
≥
V
I
≥
−
25 Vdc
5.0 mA
≤
I
O
≤
1.0 A
5.0 mA
≤
I
O
≤
1.5 A, T
J
= +25°C
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A. T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 A, 0°C
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
Min
−4.9
−
−
−
−
−
−
−
−4.80
−
−
−
−
−
−
−
−
Typ
−5.0
2.0
7.0
7.0
6.0
11
4.0
9.0
−
4.4
−
−
−
40
70
1.3
−1.0
Max
−5.1
25
50
50
50
mV
100
50
100
Vdc
−5.20
8.0
1.3
0.5
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Unit
Vdc
mV
Reg
load
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
MC7905.2C
ELECTRICAL CHARACTERISTICS
(V
I
=
−10
V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 2)
(T
J
= +25°C, I
O
= 100 mA)
−7.2
Vdc
≥
V
I
≥
−
25 Vdc
−8.0
Vdc
≥
V
I
≥
−12
Vdc
(T
J
= +25°C, I
O
= 500 mA)
−7.2
Vdc
≥
V
I
≥
−
25 Vdc
−8.0
Vdc
≥
V
I
≥
−12
Vdc
Load Regulation, T
J
= +25°C (Note 2)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−7.2
Vdc
≥
V
I
≥
−
20 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−7.2
Vdc
≥
V
I
≥
−
25 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, 0°C
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
−4.95
−
−
−
−
−
−
−
8.0
2.2
37
8.5
12
4.5
−
4.3
−
−
42
68
1.3
−1.0
52
27
105
52
mV
105
52
Vdc
−5.45
8.0
1.3
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Min
−5.0
Typ
−5.2
Max
−5.4
Unit
Vdc
mV
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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3
MC7900 Series
MC7906C
ELECTRICAL CHARACTERISTICS
(V
I
=
−11
V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 3)
(T
J
= +25°C, I
O
= 100 mA)
−8.0
Vdc
≥
V
I
≥
−
25 Vdc
−9.0
Vdc
≥
V
I
≥
−13
Vdc
(T
J
= +25°C, I
O
= 500 mA)
−8.0
Vdc
≥
V
I
≥
−
25 Vdc
−9.0
Vdc
≥
V
I
≥
−13
Vdc
Load Regulation, T
J
= +25°C (Note 3)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−8.0
Vdc
≥
V
I
≥
−
21 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−8.0
Vdc
≥
V
I
≥
−
25 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 A, 0°C
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
−5.7
−
−
−
−
−
−
−
9.0
3.0
43
10
13
5.0
−
4.3
−
−
45
65
1.3
−1.0
60
30
120
60
mV
120
60
Vdc
−6.3
8.0
1.3
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Min
−5.75
Typ
−6.0
Max
−6.25
Unit
Vdc
mV
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
MC7908C
ELECTRICAL CHARACTERISTICS
(V
I
=
−14
V, I
O
= 500 mA, 0°C < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 3)
(T
J
= +25°C, I
O
= 100 mA)
−10.5
Vdc
≥
V
I
≥
−25
Vdc
−11
Vdc
≥
V
I
≥
−17
Vdc
(T
J
= +25°C, I
O
= 500 mA)
−10.5
Vdc
≥
V
I
≥
−25
Vdc
−11
Vdc
≥
V
I
≥
−17
Vdc
Load Regulation, T
J
= +25°C (Note 3)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−10.5
Vdc
≥
V
I
≥
−
23 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−10.5
Vdc
≥
V
I
≥
−
25 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, 0°C
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
−7.6
−
−
−
−
−
−
−
12
5.0
50
22
26
9.0
−
4.3
−
−
52
62
1.3
−1.0
80
40
160
80
mV
160
80
Vdc
−8.4
8.0
1.0
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Min
−7.7
Typ
−8.0
Max
−8.3
Unit
Vdc
mV
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
3. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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4
MC7900 Series
MC7912B, MC7912C
ELECTRICAL CHARACTERISTICS
(V
I
=
−19
V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 4)
(T
J
= +25°C, I
O
= 100 mA)
−14.5
Vdc
≥
V
I
≥
−
30 Vdc
−16
Vdc
≥
V
I
≥
−
22 Vdc
(T
J
= +25°C, I
O
= 500 mA)
−14.5
Vdc
≥
V
I
≥
−
30 Vdc
−16
Vdc
≥
V
I
≥
−
22 Vdc
Load Regulation, T
J
= +25°C (Note 4)
5.0 mA
≤
I
O
≤
1.5 A
250 mA
≤
I
O
≤
750 mA
Output Voltage
−14.5
Vdc
≥
V
I
≥
−
27 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current (T
J
= +25°C)
Input Bias Current Change
−14.5
Vdc
≥
V
I
≥
−
30 Vdc
5.0 mA
≤
I
O
≤
1.5 A
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 mA, Tlow*
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
−
−
−
−
Reg
load
−
−
−11.4
−
−
−
−
−
−
−
13
6.0
55
24
46
17
−
4.4
−
−
75
61
1.3
−1.0
120
60
240
120
mV
240
120
Vdc
−12.6
8.0
1.0
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Min
−11.5
Typ
−12
Max
−12.5
Unit
Vdc
mV
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
MC7912AC
ELECTRICAL CHARACTERISTICS
(V
I
=
−19
V, I
O
= 500 mA, Tlow* < T
J
< +125°C, unless otherwise noted.)
Characteristics
Output Voltage (T
J
= +25°C)
Line Regulation (Note 4)
−16
Vdc
≥
V
I
≥
−
22 Vdc; I
O
= 1.0 A, T
J
= +25°C
−16
Vdc
≥
V
I
≥
−
22 Vdc; I
O
= 1.0 A
−14.8
Vdc
≥
V
I
≥
−
30 Vdc; I
O
= 500 mA
−14.5
Vdc
≥
V
I
≥
−
27 Vdc; I
O
= 1.0 A, T
J
= +25°C
Load Regulation (Note 4)
5.0 mA
≤
I
O
≤
1.5 A, T
J
= +25°C
250 mA
≤
I
O
≤
750 mA
5.0 mA
≤
I
O
≤
1.0 A
Output Voltage
−14.8
Vdc
≥
V
I
≥
−
27 Vdc, 5.0 mA
≤
I
O
≤
1.0 A, P
≤
15 W
Input Bias Current
Input Bias Current Change
−15
Vdc
≥
V
I
≥
−
30 Vdc
5.0 mA
≤
I
O
≤
1.0 A
5.0 mA
≤
I
O
≤
1.5 A, T
J
= +25°C
Output Noise Voltage (T
A
= +25°C, 10 Hz
≤
f
≤
100 kHz)
Ripple Rejection (I
O
= 20 mA, f = 120 Hz)
Dropout Voltage (I
O
= 1.0 A, T
J
= +25°C)
Average Temperature Coefficient of Output Voltage
I
O
= 5.0 A, Tlow*
≤
T
J
≤
+125°C
Symbol
V
O
Reg
line
Min
−11.75
−
−
−
−
−
−
−
−11.5
−
−
−
−
−
−
−
−
Typ
−12
6.0
24
24
13
46
17
35
−
4.4
−
−
−
75
61
1.3
−1.0
Max
−12.25
60
120
120
120
mV
150
75
150
Vdc
−12.5
8.0
0.8
0.5
0.5
−
−
−
−
mV
dB
Vdc
mV/°C
mA
mA
Unit
Vdc
mV
Reg
load
V
O
I
IB
DI
IB
V
n
RR
V
I
−V
O
DV
O
/DT
4. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
*Tlow =
−40°C
for MC7912B and Tlow = 0°C for MC7912C.
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