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L7812AB 数据表(PDF) 9 Page - STMicroelectronics

部件名 L7812AB
功能描述  Precision 1 A regulators
PDF  26 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L7812AB 数据表(HTML) 9 Page - STMicroelectronics

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L78xxAB - L78xxAC
Electrical characteristics
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Table 6.
Electrical characteristics of L7808A (VI = 14 V, IO = 1 A, TJ = 0 to 150 °C (L7808AC),
TJ = -40 to 125 °C (L7808AB), unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VO
Output voltage
TJ = 25°C
7.84
8
8.16
V
VO
Output voltage
IO = 5mA to 1A, PO ≤15W
VI = 10.6 to 23V
7.7
8
8.3
V
ΔVO (1) Line regulation
VI = 10.6 to 25V, IO = 500 mA
12
80
mV
VI = 11 to 17V
15
80
mV
VI = 11 to 17V, TJ = 25°C
5
40
mV
VI = 10.4 to 23V, TJ = 25°C
12
80
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
4.3
6
mA
6mA
ΔIq
Quiescent current change
VI = 11 to 25V, IO = 500 mA
0.8
mA
VI = 10.6 to 23V, TJ = 25°C
0.8
mA
IO = 5mA to 1A
0.5
mA
SVR
Supply voltage rejection
VI = 11.5 to 21.5V, f = 120Hz,
IO = 500mA
62
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
-0.8
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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