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KA78T12 Datasheet(PDF) 4 Page - Fairchild Semiconductor

No. de pieza KA78T12
Descripción Electrónicos  3-Terminal 3A Positive Voltage Regulator
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA78T12 Datasheet(HTML) 4 Page - Fairchild Semiconductor

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KA78TXX
4
Electrical Characteristics(KA78T15) (Continued)
(VI = 23V, IO = 3.0A, 0
°C ≤ TJ ≤ +125°C, Po ≤ PMAX (Note1), unless otherwise specified.)
Note:
1. Although power dissipation is internally limited, specifications apply only for PO
≤ Pmax, Pmax = 25W
2. 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 (Note2)
∆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, TJ =+25°C
20V
≤ VI ≤ 26V, Io =3.0A, TJ =+25°C
-7.5
55
mV
Load Regulation (Note2)
∆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, TJ =+25°C
-0.1
0.8
mA
Ripple Rejection
RR
f = 120Hz, 18.5V
≤ VI ≤ 28.5V, Io = 2.0A
TJ =+25
°C
-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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