KA278R12 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – Low Dropout Voltage Regulator

KA278R12
Low Dropout Voltage Regulator
www.fairchildsemi.com
Features
• 2A / 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 KA278R12 is a low-dropout voltage regulator suitable
for various electronic equipments. It provide constant
voltage power source with TO-220F-4 lead full mold
package. Dropout voltage of KA278R12 is below 0.5V in
full rated current(2A). This regulator has various function
such as peak current protection, thermal shut down,
overvoltage protection and output disable function.
TO-220F-4L
1
1. Vin 2. Vo 3. GND 4. Vdis
Internal Block Diagram
Vin 1
THERMAL SHUTDOWN
BANDGAP REFERENCE
HIGH / LOW
Vdis 4
-
+
OUTPUT
ON / OFF
1.4V
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
SH_SO_HOR_RT_T-C_CII_RR_CC_UU_ITIT
PROTECTION
Q1
R1
R2
2 Vo
3
GND
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.2