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Fairchild Semiconductor Electronic Components Datasheet

378R12 Datasheet

KA378R12

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KA378R12
Low Dropout Voltage Regulator
www.fairchildsemi.com
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
Internal Block Diagram
Vin 1
THERMAL SHUTDOWN
BANDGAP REFERENCE
HIGH/ LOW
Vdis 4
1.4V
OUTPUT
- ON/ OFF
+
1
1. Vin 2. Vo 3. GND 4. Vdis
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
SHSOHROTR-TCCIIRRCCUUITIT
PROTECTION
Q1
R1
R2
2 Vo
©2005 Fairchild Semiconductor Corporation
3
GND
Rev. 1.0.3


Fairchild Semiconductor Electronic Components Datasheet

378R12 Datasheet

KA378R12

No Preview Available !

KA378R12
www.DataSheet4U.com
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 = 15V, Io = 1.5A, Ta = 25°C, unless otherwise specified)
Parameter
Output Voltage
Load Regulation
Line Regulation
Ripple Rejection Ratio
Dropout Voltage
Disable Voltage High
Disable Voltage Low
Disable Bias Current High
Disable Bias Current Low
Quiescent Current
Symbol
Vo
Rload
Rline
RR
Vdrop
VdisH
VdisL
IdisH
IdisL
Iq
Conditions
-
5mA < Io < 3A
13V < Vin < 29V
Note1
Io = 3A
Output Active
Output Disabled
Vdis = 2.7V
Vdis = 0.4V
Io = 0A
Note:
1.These parameters, although guaranteed, are not 100% tested in production.
2. Junction -to-case thermal resistance test environments.
-.Pneumatic heat sink fixture.
-.Clamping pressure 60psi through 12mm diameter cylinder.
-.Thermal grease applied between PKG and heat sink fixture
Min. Typ. Max. Unit
11.7 12.0 12.3
V
-
0.1 2.0
%
-
0.5 2.5
%
45 55 - dB
- - 0.5 V
2.0 - - V
- - 0.8 V
- - 20 µA
- - -0.4 mA
- - 10 mA
2


Part Number 378R12
Description KA378R12
Maker Fairchild Semiconductor
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378R12 Datasheet PDF






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Fairchild Semiconductor





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