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L7812AB Datasheet(PDF) 11 Page - STMicroelectronics

Part # L7812AB
Description  Precision 1 A regulators
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7812AB Datasheet(HTML) 11 Page - STMicroelectronics

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L78xxAB - L78xxAC
Electrical characteristics
11/26
Table 8.
Electrical characteristics of L7812A (VI = 19 V, IO = 1 A, TJ = 0 to 150 °C (L7812AC),
TJ = -40 to 125 °C (L7812AB), unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
11.75
12
12.25
V
VO
Output voltage
IO = 5mA to 1A, PO ≤15W
VI = 14.8 to 27V
11.5
12
12.5
V
ΔVO (1) Line regulation
VI = 14.8 to 30V, IO = 500 mA
13
120
mV
VI = 16 to 12V
16
120
mV
VI = 16 to 12V, TJ = 25°C
6
60
mV
VI = 14.5 to 27V, TJ = 25°C
13
120
mV
ΔVO (1) Load regulation
IO = 5mA to 1A
25
100
mV
IO = 5mA to 1.5A, TJ = 25°C
30
100
V
IO = 250 to 750mA
10
50
V
Iq
Quiescent current
TJ = 25°C
4.4
6
mA
6mA
ΔIq
Quiescent current change
VI = 15 to 30V, IO = 500 mA
0.8
mA
VI = 14.8 to 27V, TJ = 25°C
0.8
mA
IO = 5mA to 1A
0.5
mA
SVR
Supply voltage rejection
VI = 15 to 25V, f = 120Hz, IO = 500mA
60
dB
Vd
Dropout voltage
IO = 1A, TJ = 25°C
2
V
eN
Output noise voltage
TA = 25°C, B =10Hz to 100kHz
10
µV/VO
RO
Output resistance
f =1kHz
18
m
Ω
Isc
Short circuit current
VI = 35V, TA = 25°C
0.2
A
Iscp
Short circuit peak current
TJ = 25°C
2.2
A
ΔVO/ΔT Output voltage drift
-1
mV/°C
1.
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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