KA278RA05CYDTU Fairchild Semiconductor, KA278RA05CYDTU Datasheet

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KA278RA05CYDTU

Manufacturer Part Number
KA278RA05CYDTU
Description
IC REG LDO 2A ADJ TO-220FL-4
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of KA278RA05CYDTU

Regulator Topology
Positive Adjustable
Voltage - Output
1.25 ~ 32 V
Voltage - Input
Up to 35V
Number Of Regulators
1
Current - Output
2A (Max)
Operating Temperature
-20°C ~ 80°C
Mounting Type
Through Hole
Package / Case
TO-220-4 Full Pack (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Dropout (typical)
-
Current - Limit (min)
-
Features
KA278RXXC-series (33/05/51/09/12)
• 2A/3.3V, 5V, 5.1V, 9V, 12V output low dropout voltage
• TO-220 full-mold package (4pin)
• Overcurrent protection, thermal shutdown
• Overvoltage protection, short circuit protection
• With output disable function
KA278RA05C
• Nominal 5V output without adjusting
• Output adjustable between 1.25V and 32V
• 2A output low dropout voltage regulator
• TO-220 full-mold package (4pin)
• Overcurrent protection, thermal shutdown
• Overvoltage protection, short circuit protection
Internal Block Diagram
©2005 Fairchild Semiconductor Corporation
KA278RXXC-Series
2A Output Low Dropout Voltage Regulators
Vin
regulator
1
Vdis
HIGH / LOW
4
1.4V
BANDGAP REFERENCE
THERMAL SHUTDOWN
-
+
(KA278R33/05/51/09/12C)
OUTPUT
ON / OFF
SOA PROTECTION
SHORTCIRCUIT
PROTECTION
-
+
OVERVOLTAGE
PROTECTION
GND
3
Q1
R1
R2
2
Vo
Vin
Description
The KA278RXXC is a low-dropout voltage regulator suit-
able for various electronic equipments. It provides
constant voltage power source with TO-220-4 lead full mold
package. The dropout voltage of KA278RXXC is below
0.5V in full rated current(2A). This regulator has various
functions such as a peak current protection, a thermal shut
down, an overvoltage protection .
1.Vin 2. Vo 3. GND 4. Vdis - KA278RXXC(33/05/51/09/12)
1.Vin 2. Vo 3. GND 4. Vadj - KA278RA05C
1
TO-220F-4L
1
BANDGAP REFERENCE
THERMAL SHUTDOWN
(KA278RA05C)
www.fairchildsemi.com
SOA PROTECTION
OVERVOLTAGE
PROTECTION
SHORTCIRCUIT
PROTECTION
-
+
GND
3
Q1
Rev. 1.0.2
Rin
Rref
2
4
Vo
Vadj

Related parts for KA278RA05CYDTU

KA278RA05CYDTU Summary of contents

Page 1

... SHORTCIRCUIT 1.4V PROTECTION 3 GND (KA278R33/05/51/09/12C) ©2005 Fairchild Semiconductor Corporation Description The KA278RXXC is a low-dropout voltage regulator suit- able for various electronic equipments. It provides constant voltage power source with TO-220-4 lead full mold package. The dropout voltage of KA278RXXC is below 0.5V in full rated current(2A). This regulator has various functions such as a peak current protection, a thermal shut down, an overvoltage protection ...

Page 2

KA278RXXC-SERIES Absolute Maximum Ratings KA278RXXC, KA278RA05C Parameter Input voltage Disable voltage Output current Power dissipation 1 Power dissipation 2 Junction temperature Operating temperature Thermal resistance, junction-to case (note2) Thermal resistance, junction-to-air (note2) 2 Symbol Value Vin 35 KA278RXXC Vdis 35 ...

Page 3

Electrical Characteristics (Vin=Note3, Io=1.0A, Ta= unless otherwise specified) Parameter KA278R33C KA278R05C Output voltage KA278R51C KA278R09C KA278R12C Load regulation Line regulation Ripple rejection ratio Dropout voltage Disable voltage high KA278RXXC Disable voltage low KA278RXXC Disable bias current high KA278RXXC ...

Page 4

KA278RXXC-SERIES Typical Performance Characteristics KA278R33C 5.25 4.50 3.75 RL= 3.00 2.25 RL=3.3 1.50 0. Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 5.25 4.50 3.75 3.00 2.25 1.50 0. 0.5 ...

Page 5

Typical Performance Characteristics - TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.50 4.25 4.00 3.75 3. Input-output differential voltage Vin-Vo (V) Figure 9. Output ...

Page 6

KA278RXXC-SERIES Typical Performance Characteristics KA278R05C RL= 4 RL=2 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 0.5 1 ...

Page 7

Typical Performance Characteristics - TEMPERATURE Tj( C) Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.50 4.25 4.00 3.75 3. Input-output differential voltage Vin-Vo (V) Figure ...

Page 8

KA278RXXC-SERIES Typical Performance Characteristics KA278R51C RL= 4 RL=2 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 0.5 1 1.5 ...

Page 9

Typical Performance Characteristics -25 TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj = 0.5V ...

Page 10

Typical Performance Characteristics KA278R09C RL=4 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 0.5 1 1.5 Disable voltage Vdis (V) ...

Page 11

Typical Performance Characteristics - TEMPERATURE Tj( C) Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.50 4.25 4.00 3.75 3. Input-output differential voltage Vin-Vo (V) Figure 9. ...

Page 12

KA278RXXC-SERIES Typical Performance Characteristics KA278R12C 15.0 12.5 RL= 10.0 RL= 6 7.5 5.0 2 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 15.0 12.5 10.0 7.5 5.0 2 0.5 1 ...

Page 13

Typical Performance Characteristics - TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.75 4.50 4.50 4.25 4.25 4.00 4.00 3.75 3.75 3.50 3. ...

Page 14

KA278RXXC-SERIES Typical Performance Characteristics KA278RA05C RL= 4 RL=2 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 - ...

Page 15

Typical Performance Characteristics 100 100 3.0 3 1.0 1.0 2.0 2.0 Output Current(A) Output Current(A) Figure 7. Overcurrent Protection Characteristics(Typical value) (Continued) 4.75 4.50 4.25 4.00 3.75 3.50 ...

Page 16

KA278RXXC-SERIES Typical Application KA278R33/05/51/09/12C • required if regulator is located at an appreciable distance from power supply filter. • Co improves stability and transient response.(Co > KA278RA05 Input Input Input ...

Page 17

Mechanical Dimensions Package Dimensions in millimeters TO-220F-4L KA278RXXC-SERIES 17 ...

Page 18

KA278RXXC-SERIES Mechanical Dimensions Package TO-220F-4L (Forming) 18 (Continued) Dimensions in millimeters ...

Page 19

Mechanical Dimensions Package TO-220F-4L (Short Lead) (Continued) Dimensions in millimeters NOTE 1. THESE DIMENSIONS DO NOT INCLUDE MOLD PROTRUSION REFERENCE ASS'Y OUT QUALITY KA278RXXC-SERIES TITLE PKG OUTLINE D TO-220F-4L , SHORT LEAD ...

Page 20

... KA278R09CTU KA278R12CTU KA278RA05CTU KA278R33CYDTU KA278R05CYDTU KA278R09CYDTU TO-220F-4L(Forming) KA278R12CYDTU KA278RA05CYDTU KA278R33CTSTU KA278R05CTSTU TO-220F-4L (Short Lead) KA278R12CTSTU 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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