KA278R12TU 查看數據表（PDF） - Fairchild Semiconductor
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KA278R12TU Datasheet PDF : 8 Pages
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KA278R12
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 Resistance, Junction-to-Air (Note2)
Thermal Shutdown Temperature
Symbol
Vin
Vdis
Io
Pd1
Pd2
Tj
Topr
Rθjc
Rθja
Ttsd
Value
35
35
2.0
1.5
15
150
-20~80
2.9
48.51
150
Electrical Characteristics
(Vin=15V, Io=1.0A, 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 < 2A
13V < Vin < 29V
note1
Io = 2A
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 enviroments.
-. Pneumatic heat sink fixture.
-. Clamping pressure 60psi through 12mm diameter cylinder.
-. Thermal grease applied between PKG and heat sink fixture
Unit
V
V
A
W
W
°C
°C
°C/W
°C/W
°C
Remark
-
-
-
No Heatsink
With Heatsink
-
-
-
-
-
Min. Typ. Max. Unit
11.7 12 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
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