ka278ra05 Fairchild Semiconductor, ka278ra05 Datasheet

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ka278ra05

Manufacturer Part Number
ka278ra05
Description
Low Dropout Voltage Regulator Fixed & Adjustable
Manufacturer
Fairchild Semiconductor
Datasheet

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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
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
K A 2 7 8 RA05
L ow D r o p o u t Vo l t a ge Re g u l at o r
(Fix e d & A d j u s t a b l e )
Vin
1
BANDGAP REFERENCE
THERMAL SHUTDOWN
SHORT-CIRCUIT
SOA PROTECTION
OVERVOLTAGE
PROTECTION
SHORTCIRCUIT
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.
+
-
1. Vin 2. V
TO-220F-4L
GND
3
1
O
3. GND 4. Vadj
Q1
www.fairchildsemi.com
Rin
R2
Rref
R1
1.8k
0.6k
2
4
Vo
Vadj
Rev. 1.0.2

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ka278ra05 Summary of contents

Page 1

... 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 ...

Page 2

... KA278RA05 Absolute Maximum Ratings Parameter Input Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Electrical Characteristics (Vin =7V, I =1.0A unless otherwise specified) O Parameter Symbol Output Voltage Load Regulation Line Regulation Ripple Rejection Ratio Dropout Voltage Quiescent Current Reference Voltage Note: 1 ...

Page 3

... Figure 2. Quiescent Current vs. Input Voltage 100 125 C) Figure 4. Quiescent Current vs. Temperature(Tj) =5V 100 125 o C) Figure 6. Power Dissipation vs. Temperature(Ta) KA278RA05 RL Input voltage Vin (V) - 100 125 o Junction temperature Tj - ...

Page 4

... KA278RA05 Typical Perfomance Characteristics 100 100 1.0 1.0 2.0 2.0 3.0 3.0 Output Current(A) Output Current(A) Figure 7. Overcurrent Protection Characteristics (Typical Value) 4 4.0 4.0 5.0 5.0 6.0 6.0 ...

Page 5

... Junction temperature Tj() Junction temperature Tj() Vin Vin KA278RA05 KA278RA05 GND GND 4 4 Vadj Vadj 3 3 Figure 9. Application Circuit (Fixed Mode) KA278RA05 Output Output Output 0.6k = 0. ...

Page 6

... KA278RA05 Mechanical Dimensions Package 6 Dimensions in millimeters TO-220F-4L ...

Page 7

... Ordering Information Product Number Package KA278RA05 TO-220F-4L Operating Temperature - KA278RA05 7 ...

Page 8

... KA278RA05 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...

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