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PDF KA78R12 Data sheet ( Hoja de datos )

Número de pieza KA78R12
Descripción Low Dropout Voltage Regulator
Fabricantes Fairchild 
Logotipo Fairchild Logotipo




1. KA78R12






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No Preview Available ! KA78R12 Hoja de datos, Descripción, Manual

KA78R12
Low Dropout Voltage Regulator
www.fairchildsemi.com
Features
• 1A / 12V 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 KA78R12 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 KA78R12 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. Vdis
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
Q1
R1
SHSOHROTR-TCCIRIRCCUUIT
PROTECTION
R2
2 Vo
©2001 Fairchild Semiconductor Corporation
3
GND
Rev. 1.0.1

1 page




KA78R12 pdf
Typical Application
Vin
1
Vo
2
4
Vdis
3
GND
Disable Signal
Figure 1.Application Circuit
• Ci is required if regulator is located an appreciable distance from power supply filter.
• Co improves stability and transient response.(Co > 47µF)
KA78R12
5

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