Customer Specific Device from ON Semiconductor
1.0 A Positive Voltage
Regulators
SCD7800,
SCD7800A
These voltage regulators are monolithic integrated
circuits designed as fixed−voltage regulators for a wide
variety of applications including local, on−card regulation.
These regulators employ internal current limiting, thermal
shutdown, and safe−area compensation. With adequate
heatsinking they can deliver output currents in excess of
1.0 A. Although designed primarily as a fixed voltage
regulator, these devices can be used with external
components to obtain adjustable voltages and currents.
1
Output Current in Excess of 1.0 A
No External Components Required
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe−Area Compensation
Output Voltage Offered in 2% and 4% Tolerance
Pb−Free Packages are Available
Input
Cin*
0.33 mF
Symbol
Value
Unit
VI
35
40
Vdc
PD
Internally
Limited
W
Thermal Resistance,
Junction−to−Ambient
RqJA
65
°C/W
Thermal Resistance,
Junction−to−Case
RqJC
5.0
°C/W
Storage Junction Temperature
Range
Tstg
−65 to +150
°C
Input Voltage
(5.0 − 18 V)
(24 V)
Power Dissipation
Operating Junction
Temperature
SCD78XX
Output
CO**
A common ground is required between the
input and the output voltages. The input voltage
must remain typically 2.0 V above the output
voltage even during the low point on the input
ripple voltage.
XX, These two digits of the type number
indicate nominal voltage.
* Cin is required if regulator is located an
appreciable distance from power supply
filter.
** CO is not needed for stability; however,
it does improve transient response. Values
of less than 0.1 mF could cause instability.
ORDERING INFORMATION
TJ
+150
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
°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.
© Semiconductor Components Industries, LLC, 2011
September, 2011 − Rev. 4
Heatsink surface
connected to Pin 2.
STANDARD APPLICATION
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted)
Rating
2
3
Pin 1. Input
2. Ground
3. Output
Features
•
•
•
•
•
•
•
TO−220−3
T SUFFIX
CASE 221AB
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 19 of this data sheet.
1
Publication Order Number:
SCD7800/D
SCD7800, SCD7800A
Vin
SCD7800
R24
50
D2
Zener
LAT 3 A
Q18
LAT
Q17
Q19
QNPN
C3
R19
27.5 k
Q20
QNPN
1.0 P
R14
1.0 k
Q10
QNPN
R18
100 k
R21
600
R22
100
Q7
QNPN
R15
680
R23
0.2
Vout
5.01
Q5
QNPN 2
R17
9.0 k
R11
15 k
Q6
QNPN
D1
Zener
R30
18 k
Q12
QNPN
Q9
QNPN 2
Q15
QNPN
R1
10.66 k
R16
600
R20
17500
Q8
QNPN
R2
1.56 k
Q1
C2
3.0 P
R10
3340-(3316ACT)
R9
3.0 k
R5
4.5 k
Q14
QNPN
Sense
N+
QNPN 6
SUB
Q11 2
C1
30 P
Q4
QNPN
Q13
QNPN
Q3
QNPN
Q2
Q16
QNPN 4
Diode
R6
1.0 k
R7
14 k
R3
1.8 k
R8
5.0 k
This device contains 22 active transistors.
Figure 1. Representative Schematic Diagram
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2
R12
3.0 k
R29
9.0 k
R25
6.0 k
R28
9.0 k
R26
3.0 k
R27
9.0 k
R13
11660
SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh (Note 1), unless otherwise noted)
SCD7805B
Characteristic
SCD7805C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
4.8
5.0
5.2
4.8
5.0
5.2
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
7.0 Vdc ≤ Vin ≤ 20 Vdc
8.0 Vdc ≤ Vin ≤ 20 Vdc
VO
−
4.75
−
5.0
−
5.25
4.75
−
5.0
−
5.25
−
5.0
1.3
100
50
−
−
0.5
0.8
20
10
−
−
1.3
0.15
100
50
−
−
1.3
1.3
25
25
−
3.2
8.0
−
3.2
6.5
−
−
−
−
−
0.5
−
−
0.3
0.08
1.0
0.8
Line Regulation (Note 4)
7.5 Vdc ≤ Vin ≤ 20 Vdc, 1.0 A
8.0 Vdc ≤ Vin ≤ 12 Vdc
Regline
Load Regulation (Note 4)
5.0 mA ≤ IO ≤ 1.0 A
5.0 mA ≤ IO ≤ 1.5 A (TA = 25°C)
Regload
Quiescent Current
IB
−
−
Vdc
mV
mV
mA
Quiescent Current Change
7.0 Vdc ≤ Vin ≤ 25 Vdc
5.0 mA ≤ IO ≤ 1.0 A (TA = 25°C)
DIB
Ripple Rejection
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
RR
−
68
−
62
83
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
0.9
−
−
0.9
−
mW
Short Circuit Current Limit (TA = 25°C)
Vin = 35 Vdc
ISC
−
0.2
−
−
0.6
−
A
Peak Output Current (TJ = 25°C)
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−0.3
−
−
−0.3
−
mV/°C
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Average Temperature Coefficient of Output Voltage
mA
1. Tlow = 0°C for SCD78XXAC, C, Thigh = +125°C for SCD78XXAC
= *40°C for SCD78XXB, SCD78XXAB
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh (Note 3), unless otherwise noted)
SCD7805AB/SCD7805AC
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
4.9
5.0
5.1
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
7.5 Vdc ≤ Vin ≤ 20 Vdc
VO
4.8
5.0
5.2
Vdc
Line Regulation (Note 4)
Regline
mV
7.5 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA
−
0.5
10
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A
−
0.8
12
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A, TJ = 25°C
−
1.3
4.0
7.3 Vdc ≤ Vin ≤ 20 Vdc, IO = 1.0 A, TJ = 25°C
−
4.5
10
Load Regulation (Note 4)
Regload
mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C
−
5.0 mA ≤ IO ≤ 1.0 A
250 mA ≤ IO ≤ 750 mA
Quiescent Current
IB
Quiescent Current Change
1.3
25
−
0.8
25
−
0.53
15
−
3.2
6.0
mA
DIB
8.0 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA
−
0.3
0.8
7.5 Vdc ≤ Vin ≤ 20 Vdc, TJ = 25°C
−
−
0.8
5.0 mA ≤ IO ≤ 1.0 A
mA
−
0.08
0.5
RR
68
83
−
dB
VI − VO
−
2.0
−
Vdc
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
−
10
−
mV/VO
Output Resistance (f = 1.0 kHz)
rO
−
0.9
−
mW
Short Circuit Current Limit (TA = 25°C)
Vin = 35 Vdc
ISC
−
0.2
−
A
Peak Output Current (TJ = 25°C)
Imax
−
2.2
−
A
TCVO
−
−0.3
−
mV/°C
Ripple Rejection
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Average Temperature Coefficient of Output Voltage
3. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
4. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh (Note 5), unless otherwise noted)
SCD7806B
Characteristic
SCD7806C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
5.75
6.0
6.25
5.75
6.0
6.25
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
8.0 Vdc ≤ Vin ≤ 21 Vdc
−
−
−
5.7
6.0
6.3
9.0 Vdc ≤ Vin ≤ 21 Vdc
5.7
6.0
6.3
−
−
−
8.0 Vdc ≤ Vin ≤ 25 Vdc
−
5.5
120
−
0.5
24
9.0 Vdc ≤ Vin ≤ 13 Vdc
−
1.4
60
−
0.8
12
Regload
−
1.3
120
−
1.3
30
mV
IB
−
3.3
8.0
−
3.3
8.0
mA
8.0 Vdc ≤ Vin ≤ 25 Vdc
−
−
−
−
0.3
1.3
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
0.08
0.5
RR
−
65
−
58
65
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
0.9
−
−
0.9
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−0.3
−
−
−0.3
−
mV/°C
Line Regulation, TJ = 25°C (Note 6)
Load Regulation, TJ = 25°C (Note 6)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current (TJ = 25°C)
Quiescent Current Change
Ripple Rejection
mA
DIB
9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output
Voltage
5. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC
= −40°C for SCD78XXB, SCD78XXAB
6. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh (Note 7), unless otherwise noted)
SCD7808B
Characteristic
SCD7808C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
7.7
8.0
8.3
7.7
8.0
8.3
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
10.5 Vdc ≤ Vin ≤ 23 Vdc
−
−
−
7.6
8.0
8.4
11.5 Vdc ≤ Vin ≤ 23 Vdc
7.6
8.0
8.4
−
−
−
10.5 Vdc ≤ Vin ≤ 25 Vdc
−
6.0
160
−
6.0
32
11 Vdc ≤ Vin ≤ 17 Vdc
−
1.7
80
−
1.7
16
Regload
−
1.4
160
−
1.4
35
mV
IB
−
3.3
8.0
−
3.3
8.0
mA
10.5 Vdc ≤ Vin ≤ 25 Vdc
−
−
−
−
−
1.0
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
−
62
−
56
62
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
0.9
−
−
0.9
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−0.4
−
−
−0.4
−
mV/°C
Line Regulation, TJ = 25°C, (Note 8)
Load Regulation, TJ = 25°C (Note 8)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
Ripple Rejection
mA
DIB
11.5 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
7. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
8. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh (Note 9), unless otherwise noted)
SCD7809B
Characteristic
SCD7809C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
8.65
9.0
9.35
8.65
9.0
9.35
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
11.5 Vdc ≤ Vin ≤ 24 Vdc
Line Regulation, TJ = 25°C (Note 10)
8.55
9.0
9.45
8.55
9.0
9.45
Regline
mV
11 Vdc ≤ Vin ≤ 26 Vdc
−
6.2
32
−
6.2
32
11.5 Vdc ≤ Vin ≤ 17 Vdc
−
1.8
16
−
1.8
16
Regload
−
1.5
35
−
1.5
35
mV
IB
−
3.4
8.0
−
3.4
8.0
mA
Load Regulation, TJ = 25°C (Note 10)
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
mA
DIB
11.5 Vdc ≤ Vin ≤ 26 Vdc
−
−
1.0
−
−
1.0
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
56
61
−
56
61
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.0
−
−
1.0
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−0.5
−
−
−0.5
−
mV/°C
Ripple Rejection
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
9. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
10. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 1.0 A, TJ = 0°C to 125°C, unless otherwise noted)
SCD7809AC
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
8.82
9.0
9.18
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
11.5 Vdc ≤ Vin ≤ 24 Vdc
VO
8.65
9.0
9.35
Vdc
−
−
−
6.2
1.8
5.2
16
7.0
16
−
−
−
−
−
−
25
25
15
−
3.3
6.0
−
−
−
−
−
−
0.8
0.8
0.5
56
61
−
Characteristic
Line Regulation (Note 11)
11.5 Vdc ≤ Vin ≤ 26 Vdc, IO = 500 mA
12 Vdc ≤ Vin ≤ 17 Vdc, IO = 1.0 A
11.5 Vdc ≤ Vin ≤ 24 Vdc, TJ = 25°C
Regline
Load Regulation (Note 11)
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C
5.0 mA ≤ IO ≤ 1.0 A
250 mA ≤ IO ≤ 750 mA
Regload
Quiescent Current
IB
Quiescent Current Change
11.5 Vdc ≤ Vin ≤ 26 Vdc, IO = 500 mA
11.5 Vdc ≤ Vin ≤ 24 Vdc, IO = 1.0 A, TJ = 25°C
5.0 mA ≤ IO ≤ 1.0 A
DIB
Ripple Rejection
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz, IO = 500 mA
RR
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
mV
mV
mA
dB
VI _ VO
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
Output Resistance f = 1.0 kHz
mA
2.0
Vdc
mV/VO
−
10
−
rO
−
1.0
−
Short Circuit Current Limit (TA = 25°C)
Vin = 35 Vdc
ISC
−
0.2
Peak Output Current (TJ = 25°C)
Imax
−
2.2
−
A
TCVO
−
−0.5
−
mV/°C
Average Temperature Coefficient of Output Voltage
mW
A
11. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh (Note 12), unless otherwise noted)
SCD7812B
Characteristic
SCD7812C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
11.5
12
12.5
11.5
12
12.5
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
14.5 Vdc ≤ Vin ≤ 27 Vdc
−
−
−
11.4
12
12.6
15.5 Vdc ≤ Vin ≤ 27 Vdc
11.4
12
12.6
−
−
−
14.5 Vdc ≤ Vin ≤ 30 Vdc
−
7.5
240
−
3.8
24
16 Vdc ≤ Vin ≤ 22 Vdc
−
2.2
120
−
0.3
24
14.8 Vdc ≤ Vin ≤ 27 Vdc, IO = 1.0 A
−
−
−
−
−
48
Regload
−
1.6
240
−
8.1
60
mV
IB
−
3.4
8.0
−
3.4
6.5
mA
Line Regulation, TJ = 25°C (Note 13)
Load Regulation, TJ = 25°C (Note 13)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
mA
DIB
14.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C
−
−
−
−
−
0.7
15 Vdc ≤ Vin ≤ 30 Vdc
−
−
1.0
−
−
0.8
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
−
60
−
55
60
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.1
−
−
1.1
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−0.8
−
−
−0.8
−
mV/°C
Ripple Rejection
15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
12. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
13. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 1.0 A, TJ = Tlow to Thigh (Note 14), unless otherwise noted)
SCD7812AB/SCD7812AC
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
11.75
12
12.25
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
11.5
12
12.5
Vdc
14.8 Vdc ≤ Vin ≤ 27 Vdc
Line Regulation (Note 15)
Regline
mV
14.8 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA
−
3.8
18
16 Vdc ≤ Vin ≤ 22 Vdc, IO = 1.0 A
−
2.2
20
14.5 Vdc ≤ Vin ≤ 27 Vdc, TJ = 25°C
−
6.0
120
Load Regulation (Note 15)
Regload
mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C
−
−
25
5.0 mA ≤ IO ≤ 1.0 A
−
−
25
−
3.4
6.0
Quiescent Current
IB
Quiescent Current Change
mA
mA
DIB
15 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA
−
−
0.8
14.8 Vdc ≤ Vin ≤ 27 Vdc, TJ = 25°C
−
−
0.8
5.0 mA ≤ IO ≤ 1.0 A, TJ = 25°C
−
−
0.5
RR
55
60
−
dB
VI − VO
−
2.0
−
Vdc
Vn
−
10
−
mV/VO
Output Resistance (f = 1.0 kHz)
rO
−
1.1
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
A
Imax
−
2.2
−
A
TCVO
−
−0.8
−
mV/°C
Ripple Rejection
15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
14. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
15. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh (Note 16), unless otherwise noted)
SCD7815B
Characteristic
SCD7815C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
14.4
15
15.6
14.4
15
15.6
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
17.5 Vdc ≤ Vin ≤ 30 Vdc
−
−
−
14.25
15
15.75
18.5 Vdc ≤ Vin ≤ 30 Vdc
14.25
15
15.75
−
−
−
17.9 Vdc ≤ Vin ≤ 30 Vdc
−
8.5
300
−
8.5
30
20 Vdc ≤ Vin ≤ 26 Vdc
−
3.0
150
−
3.0
28
Regload
−
1.8
300
−
1.8
55
mV
IB
−
3.5
8.0
−
3.5
6.5
mA
17.5 Vdc ≤ Vin ≤ 30 Vdc
−
−
−
−
−
0.8
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C
−
−
1.0
−
−
0.7
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
−
58
−
54
58
−
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.2
−
−
1.2
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−1.0
−
−
−1.0
−
mV/°C
Line Regulation, TJ = 25°C (Note 17)
Load Regulation, TJ = 25°C (Note 17)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
Ripple Rejection
mA
DIB
dB
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
16. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
17. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 A, TJ = Tlow to Thigh (Note 18), unless otherwise noted)
SCD7815AB/SCD7815AC
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
14.7
15
15.3
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
14.4
15
15.6
Vdc
17.9 Vdc ≤ Vin ≤ 30 Vdc
Line Regulation (Note 19)
Regline
mV
17.9 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA
−
8.5
20
20 Vdc ≤ Vin ≤ 26 Vdc
−
3.0
22
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C
−
7.0
20
Load Regulation (Note 19)
Regload
mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C
−
1.8
25
5.0 mA ≤ IO ≤ 1.0 A
−
1.5
25
−
1.2
15
−
3.5
6.0
250 mA ≤ IO ≤ 750 mA
Quiescent Current
IB
Quiescent Current Change
mA
mA
DIB
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA
−
−
0.8
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C
−
−
0.8
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
RR
60
80
−
dB
VI − VO
−
2.0
−
Vdc
Vn
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.2
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
A
Imax
−
2.2
−
A
TCVO
−
−1.0
−
mV/°C
Ripple Rejection
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
18. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
19. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh (Note 20), unless otherwise noted)
SCD7818B
Characteristic
SCD7818C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
17.3
18
18.7
17.3
18
18.7
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
21 Vdc ≤ Vin ≤ 33 Vdc
−
−
−
17.1
18
18.9
22 Vdc ≤ Vin ≤ 33 Vdc
17.1
18
18.9
−
−
−
21 Vdc ≤ Vin ≤ 33 Vdc
−
9.5
360
−
9.5
50
24 Vdc ≤ Vin ≤ 30 Vdc
−
3.2
180
−
3.2
25
Regload
−
2.0
360
−
2.0
55
mV
IB
−
3.5
8.0
−
3.5
6.5
mA
21 Vdc ≤ Vin ≤ 33 Vdc
−
−
−
−
−
1.0
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
−
57
−
53
57
−
dB
ViI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.3
−
−
1.3
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−1.5
−
−
−1.5
−
mV/°C
Line Regulation, (Note 21)
Load Regulation, (Note 21)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
Ripple Rejection
mA
DIB
22 Vdc ≤ Vin ≤ 33 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
20. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
21. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh (Note 22), unless otherwise noted)
SCD7824B
Characteristic
SCD7824C
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25°C)
VO
23
24
25
23
24
25
Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W)
VO
Vdc
27 Vdc ≤ Vin ≤ 38 Vdc
−
−
−
22.8
24
25.2
28 Vdc ≤ Vin ≤ 38 Vdc
22.8
24
25.2
−
−
−
27 Vdc ≤ Vin ≤ 38 Vdc
−
11.5
480
−
2.7
60
30 Vdc ≤ Vin ≤ 36 Vdc
−
3.8
240
−
2.7
48
Regload
−
2.1
480
−
4.4
65
mV
IB
−
3.6
8.0
−
3.6
6.5
mA
27 Vdc ≤ Vin ≤ 38 Vdc
−
−
−
−
−
1.0
5.0 mA ≤ IO ≤ 1.0 A
−
−
0.5
−
−
0.5
RR
−
54
−
50
54
−
dB
VI − VO
−
2.0
−
−
2.0
−
Vdc
Vn
−
10
−
−
10
−
mV/VO
Output Resistance f = 1.0 kHz
rO
−
1.4
−
−
1.4
−
mW
Short Circuit Current Limit (TA = 25°C)
ISC
−
0.2
−
−
0.2
−
A
Imax
−
2.2
−
−
2.2
−
A
TCVO
−
−2.0
−
−
−2.0
−
mV/°C
Line Regulation, (Note 23)
Load Regulation, (Note 23)
Regline
mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current
Quiescent Current Change
Ripple Rejection
mA
DIB
28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C)
Output Noise Voltage (TA = 25°C)
10 Hz ≤ f ≤ 100 kHz
Vin = 35 Vdc
Peak Output Current (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
22. Tlow = 0°C for SCD78XXAC, C
Thigh = +125°C for SCD78XXAC, C
= *40°C for SCD78XXB, SCD78XXAB
23. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
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SCD7800, SCD7800A
3.0
80
2.5
RR, RIPPLE REJECTION (dB)
I O, OUTPUT CURRENT (A)
TJ = -40°C
TJ = 0°C
2.0
TJ = 25°C
1.5
TJ = 85°C
1.0
TJ = 125°C
0.5
0
4.0
6.0
8.0
10
12
15
20
25
30
35
70
60
50
40
4.0
40
f = 120 Hz
IO = 20 mA
DVin = 1.0 V(RMS)
PART # Vin
SCD7805C= 10 V
SCD7806C= 11 V
SCD7808C= 14 V
SCD7812C= 19 V
SCD7815C= 23 V
SCD7818C= 27 V
SCD7824C= 33 V
6.0
8.0
10
Vin-Vout, INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V)
12
14
16
18
20
22
24
VO, OUTPUT VOLTAGE (V)
Figure 2. Peak Output Current as a Function of
Input/Output Differential Voltage (SCD78XXC, AC, B)
Figure 3. Ripple Rejection as a Function of
Output Voltages (SCD78XXC, AC, B)
VO, OUTPUT VOLTAGE (V)
RR, RIPPLE REJECTION (dB)
80
70
SCD78XXB, C, AC
60
Vin = 8.0 V to 18 V
IO = 500 mA
f = 120 Hz
TA = 25°C
50
40
30
0.01
0.1
1.0
20
60
100
140
TJ, JUNCTION TEMPERATURE (°C)
Figure 4. Ripple Rejection as a Function of
Frequency (SCD78XXC, AC, B)
Figure 5. Output Voltage as a Function of
Junction Temperature (SCD7805C, AC, B)
180
6.0
IB , QUIESCENT CURRENT (mA)
Z O , OUTPUT IMPEDANCE (m)
Ω
-20
f, FREQUENCY (kHz)
5.0
f = 120 Hz
IO = 500 mA
CL = 0 mF
1.0
0.5
0.3
0.2
0.1
4.0
4.9
4.8
-60
10
10
3.0
2.0
Vin = 20 V
IO = 5.0 mA
5.0
8.0
12
16
20
4.0
3.0
2.0
1.0
0
-75
24
Vin = 10 V
VO = 5.0 V
IL = 20 mA
-50
-25
0
25
50
75
100
TJ, JUNCTION TEMPERATURE (°C)
VO, OUTPUT VOLTAGE (V)
Figure 6. Output Impedance as a Function of
Output Voltage (SCD78XXC, AC, B)
Figure 7. Quiescent Current as a Function of
Temperature (SCD78XXC, AC, B)
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125
SCD7800, SCD7800A
APPLICATIONS INFORMATION
Design Considerations
wire lengths, or if the output load capacitance is large. An
input bypass capacitor should be selected to provide good
high−frequency characteristics to insure stable operation
under all load conditions. A 0.33 mF or larger tantalum,
mylar, or other capacitor having low internal impedance at
high frequencies should be chosen. The bypass capacitor
should be mounted with the shortest possible leads directly
across the regulators input terminals. Normally good
construction techniques should be used to minimize ground
loops and lead resistance drops since the regulator has no
external sense lead.
The SCD7800 Series of fixed voltage regulators are
designed with Thermal Overload Protection that shuts down
the circuit when subjected to an excessive power overload
condition, Internal Short Circuit Protection that limits the
maximum current the circuit will pass, and Output Transistor
Safe−Area Compensation that reduces the output short circuit
current as the voltage across the pass transistor is increased.
In many low current applications, compensation
capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the
regulator is connected to the power supply filter with long
SCD7805
Input
0.33 mF
R
IO
Constant
Current to
Grounded
Load
Output
SCD7805
Input
7
0.33 mF
2
0.1 mF
6
3
The SCD7800 regulators can also be used as a current source when
connected as above. In order to minimize dissipation the SCD7805C is
chosen in this application. Resistor R determines the current as follows:
1.0 k
5.0V
I +
)I
B
O
R
4
10 k
MC1741G
VO = 7.0 V to 20 V
VIN = VO ≥ 2.0 V
IB ^ 3.2 mA over line and load changes.
For example, a 1.0 A current source would require R to be a 5.0 W,
10 W resistor and the output voltage compliance would be the input
voltage less 7.0 V.
The addition of an operational amplifier allows adjustment to higher or
intermediate values while retaining regulation characteristics. The
minimum voltage obtainable with this arrangement is 2.0 V greater than the
regulator voltage.
Figure 8. Current Regulator
Figure 9. Adjustable Output Regulator
RSource
MJ2955 or Equiv.
Input
Input
0.33 mF
R
RSC
RSource
SCD78XX
0.33 mF
2N6049
or Equiv.
Output
R
≥ 10 mF
1.0 mF
MJ2955
or Equiv.
1.0 mF
≥ 10 mF
SCD78XX
1.0 mF
Output
XX = 2 digits of type number indicating voltage.
XX = 2 digits of type number indicating voltage.
The SCD7800 series can be current boosted with a PNP transistor. The
MJ2955 provides current to 5.0 A. Resistor R in conjunction with the VBE
of the PNP determines when the pass transistor begins conducting; this
circuit is not short circuit proof. Input/output differential voltage minimum is
increased by VBE of the pass transistor.
The circuit of Figure 10 can be modified to provide supply protection
against short circuits by adding a short circuit sense resistor, RSC, and an
additional PNP transistor. The current sensing PNP must be able to handle
the short circuit current of the three-terminal regulator. Therefore, a
four-ampere plastic power transistor is specified.
Figure 10. Current Boost Regulator
Figure 11. Short Circuit Protection
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SCD7800, SCD7800A
2.5
20
Vin - Vout , INPUT-OUTPUT VOLTAGE
DIFFERENTIAL (V)
qHS = 0°C/W
16
PD , POWER DISSIPATION (W)
qJC = 5°C/W
qJA = 65°C/W
TJ(max) = 150°C
qHS = 5°C/W
12
qHS = 15°C/W
8.0
4.0
No Heatsink
0
-50
-25
0
25
50
75
100
125
IO = 1.0 A
2.0
IO = 500 mA
IO = 200 mA
1.5
1.0
IO = 0 mA
0.5
0
-75
150
IO = 20 mA
-50
DVO = 2% of VO
- - - Extended Curve for
SCD78XXB
-25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
TJ, JUNCTION TEMPERATURE (°C)
Figure 12. Worst Case Power Dissipation versus
Ambient Temperature (Case 221A)
Figure 13. Input Output Differential as a Function
of Junction Temperature (SCD78XXC, AC, B)
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SCD7800, SCD7800A
DEFINITIONS
Quiescent Current − That part of the input current that is
not delivered to the load.
Output Noise Voltage − The rms ac voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
Long Term Stability − Output voltage stability under
accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.
Line Regulation − The change in output voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.
Load Regulation − The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation − The maximum total
device dissipation for which the regulator will operate
within specifications.
ORDERING INFORMATION
Device
Nominal Voltage
Operating
Temperature Range
5.0 V
T = −40°C to +125°C
SCD7805ACTG
SCD7805BTG
6.0 V
T = 0°C to +125°C
SCD7808CTG
8.0 V
T = 0°C to +125°C
SCD7809ACTG
9.0 V
T = −40°C to +125°C
T = 0°C to +125°C
SCD7812ACTG
T = 0°C to +125°C
12 V
T = −40°C to +125°C
SCD7812CTG
T = 0°C to +125°C
SCD7815ACTG
T = 0°C to +125°C
15 V
T = −40°C to +125°C
18 V
T = −40°C to +125°C
SCD7815CTG
SCD7818BTG
SCD7824BTG
SCD7824CTG
50 Units /Rail
T = 0°C to +125°C
SCD7809CTG
SCD7815BTG
TO 220
(Pb−free)
T = 0°C to +125°C
SCD7806CTG
SCD7812BTG
Shipping†
T = 0°C to +125°C
SCD7805CTG
SCD7809BTG
Package
T = 0°C to +125°C
24 V
T = −40°C to +125°C
T = 0°C to +125°C
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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18
SCD7800, SCD7800A
MARKING DIAGRAMS
MC
78xxAyT
AWLYWWG
xx
24
y
A
WL
Y
WW
G
MC
78xxyT
AWLYWWG
= 05, 06, 08, 09, 12, 15, 18, or
= B or C
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Device
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19
TO−220−3
T SUFFIX
CASE 221AB
SCD7800, SCD7800A
PACKAGE DIMENSIONS
TO−220, SINGLE GAUGE
CASE 221AB−01
ISSUE A
−T−
B
F
T
SEATING
PLANE
C
S
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCHES.
3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.
4. PRODUCT SHIPPED PRIOR TO 2008 HAD DIMENSIONS
S = 0.045 - 0.055 INCHES (1.143 - 1.397 MM)
4
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
A
Q
U
1 2 3
H
K
Z
L
R
V
J
G
D
N
INCHES
MIN
MAX
0.570
0.620
0.380
0.405
0.160
0.190
0.025
0.035
0.142
0.147
0.095
0.105
0.110
0.155
0.018
0.025
0.500
0.562
0.045
0.060
0.190
0.210
0.100
0.120
0.080
0.110
0.020
0.024
0.235
0.255
0.000
0.050
0.045
----0.080
MILLIMETERS
MIN
MAX
14.48
15.75
9.66
10.28
4.07
4.82
0.64
0.88
3.61
3.73
2.42
2.66
2.80
3.93
0.46
0.64
12.70
14.27
1.15
1.52
4.83
5.33
2.54
3.04
2.04
2.79
0.508
0.61
5.97
6.47
0.00
1.27
1.15
----2.04
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