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PDF KA278R51 Data sheet ( Hoja de datos )
| Número de pieza | KA278R51 | |
| Descripción | Low Dropout Voltage Regulator | |
| Fabricantes | Fairchild | |
| Logotipo |  |
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KA278R51
Low Dropout Voltage Regulator
www.fairchildsemi.com
Features
• 2A / 5.1V 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 KA278R51 is a low-dropout voltage regulator suitable
for various electronic equipments. It provide constant volt-
age power source with TO-220 4 lead full mold package.
Dropout voltage of KA278R51 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
Vdis
HIGH / LOW
4
-
+
OUTPUT
ON / OFF
1.4V
1
1. Vin 2. Vo 3. GND 4. Vdis
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
Q1
R1
SHSOHROTR-TCCIIRRCCUUIITT
PROTECTION
R2
2 Vo
©2001 Fairchild Semiconductor Corporation
3
GND
Rev. 1.0.1
1 page  
Typical Application
Vin
1
Ci
4
Vdis
Vo
2
3
GND
Co
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)
KA278R51
RL
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet KA278R51.PDF ] | |
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