L79(2014) 查看數據表（PDF） - STMicroelectronics
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L79 Datasheet PDF : 28 Pages
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Electrical characteristics
L79
Refer to the test circuits, TJ = 0 to 125 °C, VI = -19 V, IO = 500 mA, CI = 2.2 µF, CO = 1 µF
unless otherwise specified.
Table 7. Electrical characteristics of L7912AC
Symbol
Parameter
Test conditions
Min. Typ. Max. Unit
VO Output voltage
TJ = 25°C
-11.75 -12 -12.25 V
VO Output voltage
IO = -5 mA to -1 A, PO ≤ 15 W
VI = -15.5 to -27 V
-11.5 -12 -12.5 V
ΔVO(1) Line regulation
VI = -14.5 to -30 V, TJ = 25°C
VI = -16 to -22 V, TJ = 25°C
240
mV
120
ΔVO(1) Load regulation
IO = 5 mA to 1.5 A, TJ = 25°C
IO = 250 to 750 mA, TJ = 25°C
240
mV
120
Id
Quiescent current
TJ = 25°C
3
mA
ΔId
IO = 5 mA to 1 A
Quiescent current change
VI = -15 to -30 V
0.5
mA
1
ΔVO/ΔT Output voltage drift
IO = 5 mA
-0.8
mV/°C
eN Output noise voltage
B = 10 Hz to 100 kHz, TJ = 25°C
200
µV
SVR Supply voltage rejection ΔVI = 10 V, f = 120 Hz
54
60
dB
Vd Dropout voltage
IO = 1 A, TJ = 25°C, ΔVO = 100 mV
1.1
V
Isc Short circuit current
1.5
A
Iscp Short circuit peak current TJ = 25°C
2.5
A
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.
10/28
DocID2149 Rev 22
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