Electrical Characteristics (KA7812AE)
Refer to the test circuit, 0°C < TJ < +125°C, IO = 1 A, VI = 19 V, CI= 0.33 μF, CO = 0.1 μF, unless otherwise specified.
Symbol
Parameter
Conditions
TJ = +25°C
Min.
Typ. Max.
Unit
11.75
12.00 12.25
VO
Output Voltage
V
IO = 5 mA to 1 A, PO ≤ 15 W,
VI = 14.8 V to 27 V
11.50
12.00 12.50
VI = 14.8 V to 30 V, IO = 500 mA
VI= 16 V to 22 V
10
4
120
120
120
60
Regline
Line Regulation(27)
Load Regulation(27)
mV
VI= 14.5 V to 27 V
TJ = +25°C
10
3
VI= 16 V to 22 V
TJ = +25°C, IO = 5 mA to 1.5 A
IO = 5 mA to 1.0 A
12
12
5
100
100
50
Regload
IQ
mV
mA
mA
IO = 250 mA to 750 mA
TJ = +25°C
Quiescent Current
5.1
6.0
0.8
0.8
0.5
VI = 15 V to 30 V, TJ = +25°C
VI = 14 V to 27 V, IO = 500 mA
IO = 5 mA to 1.0 A
ΔIQ
Quiescent Current Change
ΔV/ΔT
Output Voltage Drift(28)
Output Noise Voltage
IO = 5 mA
-1
mV/°C
μV
VN
f = 10 Hz to 100 kHz, TA = +25°C
76
f = 120 Hz, IO = 500 mA,
VI = 14 V to 24 V
RR
Ripple Rejection(28)
60
dB
VDrop
RO
Dropout Voltage
IO = 1 A, TJ = +25°C
f = 1 kHz
2
V
mΩ
mA
A
Output Resistance(28)
Short-Circuit Current
Peak Current(28)
18
ISC
VI = 35 V, TA = +25°C
TJ = +25°C
250
2.2
IPK
Notes:
27. 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.
28. These parameters, although guaranteed, are not 100% tested in production.
© 2006 Fairchild Semiconductor Corporation
KA78XXE / KA78XXAE Rev. 1.9
www.fairchildsemi.com
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