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LM7812A Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. LM7812A
Description  3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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LM78XX (KA78XX, MC78XX) FIXED VOLTAGE REGULATOR (POSITIVE)
ABSOLUTE MAXIMUM RATINGS (T
A = +25
°C, unless otherwise specified)
LM7805/I/R/RI ELECTRICAL CHARACTERISTICS
(Refer to test circuit, TMIN < TJ < TMAX, IO = 500mA, VI = 10V, CI= 0.33
µF, C
O= 0.1
µF, unless otherwise specified)
* TMIN <TJ <TMAX
LM78XXI/RI: TMIN= - 40
°C, T
MAX = +125
°C
LM78XX/R: TMIN= 0
°C, T
MAX= +125
°C
* 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 is used.
Characteristic
Symbol
Value
Unit
Input Voltage (for VO = 5V to 18V)
(for VO = 24V)
VI
VI
35
40
V
V
Thermal Resistance Junction-Cases
RθJC
5
°C/W
Thermal Resistance Junction-Air
RθJA
65
°C/W
Operating Temperature Range KA78XX/A/R/RA
KA78XXI/RI
TOPR
0 ~ +125
-40 ~ +125
°C
°C
Storage Temperature Range
TSTG
-65 ~ +150
°C
LM7805I
LM7805
Min Typ Max Min Typ Max
TJ =+25
°C
4.8
5.0
5.2
4.8
5.0
5.2
Output Voltage
VO
5.0mA
≤ I
O
≤1.0A, P
O
≤ 15W
VI = 7V to 20V
VI = 8V to 20V
4.75
5.0
5.25
4.75
5.0
5.25
V
VO = 7V to 25V
4.0
100
4.0
100
VI = 8V to 12V
1.6
50
1.6
50
IO = 5.0mA to1.5A
9
100
9
100
IO =250mA to 750mA
4
50
4
50
Quiescent Current
IQ
TJ =+25
°C
5.0
8
5.0
8
mA
IO = 5mA to 1.0A
0.03
0.5
0.03
0.5
Quiescent Current Change
∆I
Q
VI= 7V to 25V
0.3
1.3
mA
VI= 8V to 25V
0.3
1.3
Output Voltage Drift
∆V
O/
∆T IO= 5mA
-0.8
-0.8
mV/
°C
Output Noise Voltage
VN
f = 10Hz to 100Khz, TA=+25
°C
42
42
µV/Vo
Ripple
Rejection
RR
f = 120Hz
VO = 8 to 18V
62
73
62
73
dB
Dropout Voltage
VO
IO = 1A, TJ =+25
°C
2
2
V
Output Resistance
RO
f = 1KHz
15
15
m
Short Circuit Current
ISC
VI = 35V, TA =+25
°C
230
230
mA
Peak Current
IPK
TJ =+25
°C
2.2
2.2
A
Characteristic
Symbol
Test Conditions
Unit
Line Regulation
∆V
O
∆V
O
Load Regulation
TJ=+25
°C
TJ=+25
°C
mV
mV




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