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KA78R09 PDF Datasheet ( 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 

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

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