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LM7812A Datasheet(PDF) 20 Page - Fairchild Semiconductor

Part # LM7812A
Description  3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

LM7812A Datasheet(HTML) 20 Page - Fairchild Semiconductor

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LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
LM7818A/RA ELECTRICAL CHARACTERISTICS
(Refer to the test circuits. TJ = 0 to +150
°C, I
O=1A, V I = 27V, C I= 0.33
µF, C
O = 0.1
µF, unless otherwise specified)
* Load and line regulation are specified at constant, junction temperature. Change in VO due to heating effects must be taken
into account separately. Pulse testing with low duty is used.
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Unit
TJ =+25
°C
17.64
18
18.36
Output Voltage
VO
IO = 5mA to 1A, PD
≤15W
VI = 21 to 33V
17.3
18
18.7
V
VI= 21 to 33V
IO = 500mA
15
180
Line Regulation
∆V
O
VI= 21 to 33V
5
180
mV
VI= 20.6V to 33V
15
180
VI= 24V to 30V
5
90
TJ =+25
°C
IO = 5mA to 1.5A
15
100
IO = 5mA to 1.0A
15
100
IO = 250 to 750mA
7
50
Quiescent Current
IQ
TJ =+25
°C
5.2
6.0
mA
VI = 21V to 33V, TJ=+25
°C
0.5
Quiescent Current Change
∆I
Q
VI = 21V to 33V, IO = 500mA
0.8
mA
IO = 5mA to 1.0A
0.8
Output Voltage Drift
∆V
O/
∆T
IO = 5mA
-1.0
mV/
°C
Output Noise Voltage
VN
f = 10Hz to 100KHz
TA =+25
°C
10
Ripple Rejection
RR
f = 120Hz, IO = 500mA
VI = 18.5V to 28.5V
57
dB
Dropout Voltage
VD
IO = 1A, TJ =+25
°C
2.0
V
Output Resistance
RO
f = 1KHz
19
m
Short Circuit Current
ISC
VI= 35V, TA =+25
°C
250
mA
Peak Current
IPK
TJ=+25
°C
2.2
A
Load Regulation
∆V
O
TJ =+25
°C
µV/V
O
mV


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