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MC7812CT Datasheet(PDF) 17 Page - ON Semiconductor

Part No. MC7812CT
Description  1.0 A Positive Voltage Regulators
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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MC7800, MC7800A, NCV7805
http://onsemi.com
17
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh (Note 28), unless otherwise noted)
MC7824B
MC7824C
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (TJ = 25Β°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
βˆ’
βˆ’
βˆ’
22.8
24
25.2
28 Vdc
≀ Vin ≀ 38 Vdc
22.8
24
25.2
βˆ’
βˆ’
βˆ’
Line Regulation, (Note 29)
Regline
mV
27 Vdc
≀ Vin ≀ 38 Vdc
βˆ’
11.5
480
βˆ’
2.7
60
30 Vdc
≀ Vin ≀ 36 Vdc
βˆ’
3.8
240
βˆ’
2.7
48
Load Regulation, (Note 29)
Regload
βˆ’
2.1
480
βˆ’
4.4
65
mV
5.0 mA
≀ IO ≀ 1.5 A
Quiescent Current
IB
βˆ’
3.6
8.0
βˆ’
3.6
6.5
mA
Quiescent Current Change
DIB
mA
27 Vdc
≀ Vin ≀ 38 Vdc
βˆ’
βˆ’
βˆ’
βˆ’
βˆ’
1.0
5.0 mA
≀ IO ≀ 1.0 A
βˆ’
βˆ’
0.5
βˆ’
βˆ’
0.5
Ripple Rejection
RR
βˆ’
54
βˆ’
50
54
βˆ’
dB
28 Vdc
≀ Vin ≀ 38 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25Β°C)
VI βˆ’ VO
βˆ’
2.0
βˆ’
βˆ’
2.0
βˆ’
Vdc
Output Noise Voltage (TA = 25Β°C)
Vn
βˆ’
10
βˆ’
βˆ’
10
βˆ’
mV/VO
10 Hz
≀ f ≀ 100 kHz
Output Resistance f = 1.0 kHz
rO
βˆ’
1.4
βˆ’
βˆ’
1.4
βˆ’
m
W
Short Circuit Current Limit (TA = 25Β°C)
ISC
βˆ’
0.2
βˆ’
βˆ’
0.2
βˆ’
A
Vin = 35 Vdc
Peak Output Current (TJ = 25Β°C)
Imax
βˆ’
2.2
βˆ’
βˆ’
2.2
βˆ’
A
Average Temperature Coefficient of Output Voltage
TCVO
βˆ’
βˆ’2.0
βˆ’
βˆ’
βˆ’2.0
βˆ’
mV/
Β°C
28. Tlow =0Β°C for MC78XXAC, C
Thigh = +125Β°C for MC78XXAC, C, NCV7805
=
*40Β°C for MC78XXB, MC78XXAB, NCV7805
29. 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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