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データシート KA78T12 PDF ( 特性, スペック, ピン接続図 )

部品番号 KA78T12
部品説明 3-Terminal 3A Positive Voltage Regulator
メーカ Fairchild
ロゴ Fairchild ロゴ 
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KA78T12 Datasheet, KA78T12 PDF,ピン配置, 機能
www.fairchildsemi.com
KA78TXX
3-Terminal 3A Positive Voltage Regulator
Features
• Output current in excess of 3.0A
• Output transistor safe operating area compensation
• Power dissipation :25W
• Internal short circuit current limiting
• Internal thermal overload protection
• Output voltage offered in 4% tolerance
• No external components required
• Output voltage of 5, 12 and 15V
Description
This family of fixed voltage regulators are monolithic
integrated circuit capable of driving loads in excess of 3.0 A.
TO-220
1
1.Input 2. GND 3. Output
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0

1 Page



KA78T12 pdf, ピン配列
KA78TXX
Electrical Characteristics(KA78T12)
(VI = 19V, IO = 3.0 A, 0 °C TJ +125 °C, Po PMAX , unless otherwise specified.)
Parameter
Symbol
Conditions
Output Voltage
Vo
5mA Io 3.0A , TJ =+25 °C
14.5V VI 27V, 5mA Io 2.0A
Line Regulation (Note1)
VO
14.5V VI 35V , Io=5mA, TJ =+25 °C
14.5V VI 35V , Io=1.0A, TJ =+25 °C
14.9V VI 28V, Io =2.0A
16V VI 22V, Io =3.0A
Load Regulation (Note1)
VO
5mA Io 3.0A , TJ =+25 °C
5mA Io 3.0A
Thermal Regulation
REGT
Pulse =10ms, P = 20W
TA = +25 °C
Quiescent Current
IQ
5mA Io 3.0A , TJ =+25 °C
5mA Io 3.0A
Quiescent Current
Change
IQ
14.5V VI 35V, Io = 5mA
TJ =+25 °C ;
14.9V VI 27V, Io =2.0A ;
5mA Io 3.0A
Ripple Rejection
RR f = 120Hz, 15V VI 25V, Io = 2.0A
Dropout Voltage
VD Io = 3A ,TJ =+25 °C
Output Noise Voltage
VN TA =+25 °C, 10Hz f 100KHz
Peak Output Current
IPK TA =+25 °C
Output Resistance
Ro f = 1.0kHz
Short Circuit Current Limit Isc VI = 35V, TJ =+25 °C
Average Temperature
Coefficient of Output
Voltage
VO/T Io = 5.0mA
Min.
11.5
11.4
Typ.
12
12
Max.
12.5
12.8
Unit
V
- 6.0 45 mV
-
10 30 mV
15 80 mV
- 0.002 0.03 %Vo/W
-
3.5 5.0
4.0 6.0
mA
mA
- 0.1 0.8 mA
57 67
-
dB
- 2.2 2.5
V
- 10 - µV/Vo
- 5.0 -
A
- 2.0 -
m
- 1.5 2.5
A
- 0.5 - mV/°C
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)
3


3Pages


KA78T12 電子部品, 半導体
KA78TXX
Mechanical Dimensions
Package
9.90 ±0.20
(8.70)
ø3.60 ±0.10
TO-220
4.50 ±0.20
1.30
+0.10
–0.05
1.27 ±0.10
2.54TYP
[2.54 ±0.20]
1.52 ±0.10
0.80 ±0.10
2.54TYP
[2.54 ±0.20]
0.50
+0.10
–0.05
2.40 ±0.20
10.00 ±0.20
6

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