KA378R33 Fairchild Semiconductor, KA378R33 Datasheet

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KA378R33

Manufacturer Part Number
KA378R33
Description
The KA378R33 is a low-dropout voltage regulator suitable for various electronic equipments
Manufacturer
Fairchild Semiconductor
Datasheet

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Features
• 3A / 3.3V Output low dropout voltage regulator
• TO220 Full-Mold package (4PIN)
• Overcurrent protection, Thermal shutdown
• Overvoltage protection, Short-Circuit protection
• With output disable function
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
KA378R33
Low Dropout Voltage Regulator
Vin
1
Vdis
4
HIGH / LOW
1.4V
THERMAL SHUTDOWN
BANDGAP REFERENCE
-
+
OUTPUT
ON / OFF
SHORT-CIRCUIT
SOA PROTECTION
SHORTCIRCUIT
PROTECTION
-
+
OVERVOLTAGE
PROTECTION
Description
The KA378R33 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 KA378R33 is below 0.5V in full rated
current(3A). This regulator has various function such as
peak current protection, thermal shut down, overvoltage pro-
tection and output disable function.
3
TO-220F-4L
1. Vin 2. Vo 3. GND 4. Vdis
1
www.fairchildsemi.com
R1
R2
2
Vo
Rev. 1.0.1

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KA378R33 Summary of contents

Page 1

... The KA378R33 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 KA378R33 is below 0.5V in full rated current(3A). This regulator has various function such as peak current protection, thermal shut down, overvoltage pro- tection and output disable function ...

Page 2

... KA378R33 Absolute Maximum Ratings Parameter Input Voltage Disable Voltage Output Current Power Dissipation 1 Power Dissipation 2 Junction Temperature Operating Temperature Electrical Characteristics (Vin=5V, Io=1.5A, Ta=25 C, unless otherwise specified) Parameter Symbol Output Voltage Load Regulation Line Regulation Ripple Rejection Ratio Dropout Voltage Disable Voltage High ...

Page 3

... Figure 2.Quiescent Current vs. Input Voltage 3.36 3.34 3.32 3.30 3.28 3.26 3.24 3.22 2 2.5 3 Figure 4.Output Voltage vs. Temperature(Tj) 0.6 0.5 0.4 0.3 0.2 0 Figure 6.Dropout Voltage vs. Junction Temperature KA378R33 RL Input voltage Vin ( 100 125 o TEMPERATURE Tj( C) Io=3A 2.0A 1.0A 0.5A - 100 125 o Junction temperature Tj( ...

Page 4

... KA378R33 Typical Perfomance Characteristics (continued - TEMPERATURE Ta TEMPERATURE Tj( Figure 7.Power Dissipation vs. Temperature(Ta 100 125 o C) Figure 8. Overcurrent Protection Characteristics 100 100 100 3.0 3.0 3 ...

Page 5

... Typical Application Vin • required if regulator is located an appreciable distance from power supply filter. • Co improves stability and transient response.(Co > Vdis Figure 1.Application Circuit KA378R33 Vo GND Disable Signal 5 ...

Page 6

... KA378R33 Mechanical Dimensions Package 6 Dimensions in millimeters TO-220F-4L ...

Page 7

... Ordering Information Product Number Package KA378R33 TO-220F-4L Operating Temperature - KA378R33 7 ...

Page 8

... KA378R33 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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