KA278R33 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – Low Dropout Voltage Regulator

KA278R33
Low Dropout Voltage Regulator
www.fairchildsemi.com
Features
• 2A / 3.3V 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 KA278R33 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 KA278R33 is below 0.5V in full rated
current(2A). 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
R2
SH_SO_HR_ORT_T-C_CI_IRR_CC_UU_ITIT
PROTECTION
2 Vo
3
GND
©2001 Fairchild Semiconductor Corporation
Rev.1.0.1