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KA378R12
Low Dropout Voltage Regulator
Features
• • • • • 3A/12V Output Low...
www.DataSheet4U.com
www.fairchildsemi.com
KA378R12
Low Dropout Voltage
Regulator
Features
3A/12V Output Low Dropout Voltage
Regulator TO-220 Full-Mold Package (4Pin) Overcurrent Protection, Thermal Shutdown Overvoltage Protection, Short Circuit Protection With Output Disable Function
Description
The KA378R12 is a low-dropout voltage
regulator suitable for various electronic equipments. It provide constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA378R12 is below 0.5V in full rated current(3A). 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
Q1
Vin
1
2
Vo
THERMAL SHUTDOWN
OVERVOLTAGE PROTECTION
BANDGAP REFERENCE
+ R1
HIGH / LOW Vdis 4 +
SOA PROTECTION OUTPUT ON / OFF
R2 1.4V
SHORT-CIRCUIT SHORTCIRCUIT PROTECTION
3 GND
Rev. 1.0.3
©2005 Fairchild Semiconductor Corporation
KA378R12
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Absolute Maximum Ratings
Parameter Input Voltage Disable Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Thermal Resistance, Junction-to Case(Note2) Thermal Shutdown Temperature Storage Temperature Symbol Vin Vdis Io Pd1 Pd2 Tj Topr Rθjc Ttsd Tstg Value 35 35 3.0 1.5 15 150 -20 ~ 80 2.9 150 -65 ~ 150 Unit V V A W W °C °C °C/W °C °C Remark No Heatsink With Heatsink -
Electrical Characteristics
(Vin = 15...