MC78T12CT Fairchild Semiconductor, MC78T12CT Datasheet - Page 2
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MC78T12CT
Manufacturer Part Number
MC78T12CT
Description
IC REGULATOR 12V 3.0A 4% TO-220
Manufacturer
Fairchild Semiconductor
Datasheet
1.MC78T05CT.pdf
(8 pages)
Specifications of MC78T12CT
Regulator Topology
Positive Fixed
Voltage - Output
12V
Voltage - Input
Up to 35V
Voltage - Dropout (typical)
2.2V @ 3A
Number Of Regulators
1
Current - Output
3A
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3 (Straight Leads)
Polarity
Positive
Number Of Outputs
1
Output Type
Fixed
Output Voltage
12 V
Output Current
3 A
Line Regulation
45 mV
Load Regulation
30 mV
Dropout Voltage (max)
2.5 V
Input Voltage Max
40 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
0 C
Maximum Power Dissipation
25000 mW
Mounting Style
Through Hole
Voltage Regulation Accuracy
4 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MC78T12CTFS
MC78TXX
Absolute Maximum Ratings
Note:
1. Thermal resistance test board
2. Assume no ambient airflow.
Electrical Characteristics(MC78T05)
(V
Note:
3. Although power dissipation is internally limited, specifications apply only for P
4. Load and line regulation are specified at constant junction temperature. Change in Vo due heating effects must be taken into
2
Parameter
Input Voltage (for V
(for V
Power Dissipation
Thermal Resistance, Junction to Air (Note1, 2)
Ta = +25 C
Thermal Resistance, Junction to Case (Note1)
Tc = +25 C
Operating Junction Temperature Range
Storage Temperature Range
Parameter
Output Voltage
Line Regulation (Note4)
Load Regulation (Note4)
Thermal Regulation
Quiescent Current
Quiescent Current Change
Ripple Rejection
Dropout Voltage
Output Noise Voltage
Peak Output Current
Output Resistance
Short Circuit Current Limit
Average Temperature
Coefficient of Output Voltage
I
Size: 76.2mm * 114.3mm * 1.6mm(1S0P)
JEDEC standard: JESD51-3, JESD51-7
account separately. Pulse testing with low duty is used.
= 10V, I
O
= 15V)
O
= 3.0 A, 0 C
O
= 5V to 12V)
T
J
Symbol
REG
+125 C, Po
V
RR
I
V
V
Ro
Isc
Vo
I
PK
O
V
V
Q
I
D
N
Q
/ T Io = 5.0mA
O
O
T
5mA
7.3V
7.2V
7.2V
7.5V
8.0V
5mA
5mA
Pulse =10ms, P = 20W
T
5mA
5mA
7.2V
T
7.5V
5mA
f = 120Hz, 8V
T
Io = 3A ,T
T
T
f = 1.0kHz
VI = 35V, T
A
J
J
A
A
= +25 C ;
= +25 C
= +25 C
= +25 C, 10Hz
= +25 C
P
MAX
Io
VI
VI
VI
VI
VI
Io
Io
Io
Io
VI
VI
Io
J
J
= +25 C
(Note3), unless otherwise specified. )
3.0A , T
3.0A , T
3.0A
3.0A , T
3.0A
3.0A, T
20V, 5mA
35V , Io=5mA, T
35V , Io=1.0A, T
20V, Io =2.0A, T
12V, Io =3.0A, T
35V, Io = 5mA
20V, Io =2.0A ;
=+25 C
Conditions
Symbol
V
R JA
R JC
T
I
PD
STG
J
T
V
J
J
J
J
= +25 C
I
18V, I
f
= +25 C
= +25 C
= +25 C
100kHz
Io
o
J
J
J
J
2.0A
=+25 C
= +25 C
= +25 C
= +25 C
O
2.0A
Internally limited
Pmax, Pmax = 25W
-65 ~ +150
0 ~ +125
Value
2.5
35
40
65
Min.
4.75
4.8
-
-
-
-
-
-
-
-
-
-
-
-
0.002
Typ.
5.0
5.0
3.0
3.5
4.0
0.1
2.2
5.0
2.0
1.5
0.2
10
15
75
10
Max.
5.25
0.03
5.2
5.0
6.0
0.8
2.5
2.5
25
30
80
-
-
-
-
-
Unit
C/W
C/W
V
V
C
C
%Vo/W
mV/ C
Unit
mV
mV
mV
mA
mA
mA
V/Vo
m
dB
V
V
A
A