KA278RA05 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – Low Dropout Voltage Regulator (Fixed & Adjustable)

KA278RA05
Low Dropout Voltage Regulator
(Fixed & Adjustable)
www.fairchildsemi.com
Features
• Nominal 5V output without adjusting
• Output Adjustable Between 1.25V and 32V
• 2A Output low dropout voltage regulator
• TO220 Full-Mold package (4PIN)
• Overcurrent protection, Thermal shutdown
• Overvoltage protection, Short-Circuit protection
Description
The KA278RA05 is a low-dropout voltage regulator suitable
for various electronic equipments. It provides constant
voltage power source with TO-220F-4 lead full mold
package. Dropout voltage of KA278RA05 is below 0.5V in
full rated current(2A). This regulator has various function
such as peak current protection, thermal shut down and over
voltage protection.
TO-220F-4L
1
1. Vin 2. VO 3. GND 4. Vadj
Internal Block Diagram
Vin 1
THERMAL SHUTDOWN
BANDGAP REFERENCE
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
SH_SO_HOR_RT_T-C_CI_IR_RC_CUU_II_TT
PROTECTION
Q1
2 Vo
R_Ri₁n 1.8kΩ
4 Vadj
Rr2ef0.6kΩ
3
GND
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.2