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データシート KA78R09 PDF ( 特性, スペック, ピン接続図 )

部品番号 KA78R09
部品説明 Low Dropout Voltage Regulator
メーカ Fairchild
ロゴ Fairchild ロゴ 
プレビュー
Total 8 pages
		
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KA78R09 Datasheet, KA78R09 PDF,ピン配置, 機能
KA78R09
Low Dropout Voltage Regulator
www.fairchildsemi.com
Features
• 1A / 9V Output low dropout voltage regulator
• TO220 Full-Mold package (4PIN)
• Overcurrent protection, Thermal shutdown
• Overvoltage protection, Short-Circuit protection
• With output disable function
Description
The KA78R09 is a low-dropout voltage regulator suitable
for various electronic equipments. It provides constant volt-
age power source with TO-220 4 lead full mold package.
Dropout voltage of KA78R09 is below 0.5V in full rated
current(1A). This regulator has various function such as
peak current protection, thermal shut down, overvoltage pro-
tection and output disable function.
TO-220F-4L
Internal Block Diagram
Vin 1
THERMAL SHUTDOWN
BANDGAP REFERENCE
HIGH / LOW
Vdis 4
-
+
OUTPUT
ON / OFF
1.4V
1
1. Vin 2. Vo 3. GND 4. Vids
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
Q1
R1
SHSOHORRTT-CCIRCCUUITIT
PROTECTION
R2
2 Vo
©2001 Fairchild Semiconductor Corporation
3
GND
Rev. 1.0.1

1 Page



KA78R09 pdf, ピン配列
Typical Perfomance Characteristics
10
9
8
7
6
5
4
3
2
1
0
0
RL=
RL=9
5 10 15 20
Input voltage Vin (V)
25
Figure 1.Output Voltage vs. Input Voltage
KA78R09
50
40
30
20
10
0
0
RL=
5 10
15 20
Input voltage Vin (V)
25
Figure 2.Quiescent Current vs. Input Voltage
10
9
8
7
6
5
4
3
2
1
0
0
0.5 1 1.5 2 2.5
Disable voltage Vdis (V)
3
Figure 3.Output Voltage vs. Disable Voltage
9.06
9.04
9.02
9.00
8.98
8.96
8.94
8.92
-25
0 25 50 75 100 125
TEMPERATURE Tj(oC )
Figure 4.Output Voltage vs. Temperature(Tj)
10
8
6
4
2
0
-25
0 25 50 75 100 125
Junction temperature Tj(oC)
Figure 5.Quiescent Current vs. Temperature(Tj)
0.6
0.5
0.4
0.3
0.2
0.1
0
-25
Io =1A
0.75A
0.5A
0.25A
0 25 50 75 100
Junction temperature Tj(oC)
125
Figure 6.Dropout Voltage vs. Junction Temperature
3


3Pages


KA78R09 電子部品, 半導体
KA78R09
Mechanical Dimensions
Package
Dimensions in millimeters
TO-220F-4L
6

6 Page





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