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KA78T12 Datenblatt(Datasheet) 4 Page - Fairchild Semiconductor

Teile-Nr. KA78T12
Beschreibung  3-Terminal 3A Positive Voltage Regulator
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Hersteller  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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KA78TXX
4
Electrical Characteristics(KA78T15)
(VI = 23V, IO = 3.0 A, 0
°C ≤ TJ ≤ +125 °C, Po ≤ PMAX , unless otherwise specified.)
Note:
1. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
account separately. Pulse testing with low duty is used. ( PMAX = 25W)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Output Voltage
Vo
5mA
≤ Io ≤ 3.0A , TJ =+25 °C
17.5V
≤ VI ≤ 30V, 5mA ≤ Io ≤ 2.0A
14.4
14.25
15
15
15.6
15.75
V
Line Regulation (Note1)
∆VO
17.6V
≤ VI ≤ 40V , Io=5mA, TJ =+25 °C
17.6V
≤ VI ≤ 40V , Io=1.0A, TJ =+25 °C
18V
≤ VI ≤ 30V, Io =2.0A
20V
≤ VI ≤ 26V, Io =3.0A
-7.5
55
mV
Load Regulation (Note1)
∆VO
5mA
≤ Io ≤ 3.0A , TJ =+25 °C
5mA
≤ Io ≤ 3.0A
-
10
15
30
80
mV
mV
Thermal Regulation
REGT
Pulse =10ms, P = 20W
TA = +25
°C
-
0.002
0.03
%Vo/W
Quiescent Current
IQ
5mA
≤ Io ≤ 3.0A , TJ =+25 °C
5mA
≤ Io ≤ 3.0A
-
3.5
4.0
5.0
6.0
mA
mA
Quiescent Current
Change
∆IQ
17.6V
≤ VI ≤ 40V, Io = 5mA
TJ =+25
°C ;
18V
≤ VI ≤ 30V, Io =2.0A ;
5mA
≤ Io ≤ 3.0A
-0.1
0.8
mA
Ripple Rejection
RR
f = 120Hz, 18.5V
≤ VI ≤ 28.5V, Io = 2.0A
55
65
-
dB
Dropout Voltage
VD
Io = 3A ,TJ =+25
°C-
2.2
2.5
V
Output Noise Voltage
VN
TA =+25
°C, 10Hz ≤ f ≤ 100KHz
-
10
-
µV/Vo
Peak Output Current
IPK
TA =+25
°C-
5.0
-
A
Output Resistance
Ro
f = 1.0kHz
-
2.0
-
m
Short Circuit Current Limit
Isc
VI = 40V, TJ =+25
°C-
1.0
2.0
A
Average Temperature
Coefficient of Output
Voltage
∆VO/∆T Io = 5.0mA
-
0.5
-
mV/
°C




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