UNISONIC TECHNOLOGIES CO., LTD
278RXX
4 TERMINAL 2A OUTPUT
LOW DROP VOLTAGE
REGULATOR
DESCRIPTION
The UTC
278RXX
Series are Low Drop Voltage Regulator
suitable for various electronic equipments.
It provides constant voltage power source with TO-220F-4
terminal lead full molded PKG. The Regulator has multi function
such as over current protection, overheat protection and ON/OFF
control.
1
TO-220F-4
LINEAR INTEGRATED CIRCUIT
FEATURES
* 2.0A Output Low Drop Voltage Regulator.
* Built in ON/OFF Control Terminal.
* Built in Over Current Protection, Over Heat Protection Function.
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
278RXXL-TF4-T
278RXXG-TF4-T
xx: Output Voltage, refer to Marking Information.
Package
TO-220F-4
Packing
Tube
Note:
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QW-R102-048.B
278RXX
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
05: 5.0V
12: 12V
33: 3.3V
LINEAR INTEGRATED CIRCUIT
MARKING
TO-220F-4
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
1
2
3
4
PIN NAME
V
IN
V
OUT
GND
Control
DESCRIPTION
Input DC supply voltage
Output voltage pin
Ground pin for the IC
ON/OFF control pin
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QW-R102-048.B
278RXX
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
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QW-R102-048.B
278RXX
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
(T
A
=25°C, unless otherwise specified)
SYMBOL
RATINGS
UNIT
REMARK
Input Voltage
V
IN
35
V
ON/OFF Control Voltage
V
C
35
V
Output Current
I
O
2
A
Power Dissipation 1
P
D1
1.5
W
No heatsink
Power Dissipation 2
P
D2
15
W
with heatsink
Junction Temperature
T
J
125
°C
Operating Temperature
T
OPR
-20~80
°C
Storage Temperature
T
STG
-30~125
°C
Soldering Temperature (10sec)
T
SOL
260
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
(T
A
=25°C, I
O
=1.0A, unless otherwise specified)
For 278R05 (V
IN
=7V)
PARAMETER
Output Voltage
Load Regulation
Line Regulation
Temperature Coefficient of Output Voltage
Ripple Rejection
Drop Out Voltage (Note)
Output ON State for Control Voltage
Output ON State for Control Current
Output OFF State for Control Voltage
Output OFF State for Control Current
Quiescent Current
For 278R12 (V
IN
=18V)
PARAMETER
Output Voltage
Load Regulation
Line Regulation
Temperature Coefficient of Output Voltage
Ripple Rejection
Drop Out Voltage (Note)
Output ON State for Control Voltage
Output ON State for Control Current
Output OFF State for Control Voltage
Output OFF State for Control Current
Quiescent Current
SYMBOL
V
O
Reg Load
Reg Line
T
C
V
O
R·R
V
D
V
C(ON)
I
C(ON)
V
C(OFF)
I
C(OFF)
I
Q
SYMBOL
V
O
Reg Load
Reg Line
T
C
V
O
R·R
V
D
V
C(ON)
I
C(ON)
V
C(OFF)
I
C(OFF)
I
Q
TEST CONDITIONS
I
O
=5mA~2A
V
IN
=6~12V
T
J
=0~125°C
45
I
O
=2A
2.0
V
C
=2.7V
V
C
=0.4V
I
O
=0
TEST CONDITIONS
I
O
=5mA~2A
V
IN
=13~29V
T
J
=0~125°C
45
I
O
=2A
2.0
V
C
=2.7V
V
C
=0.4V
I
O
=0
20
0.8
-0.4
10
MIN
11.70
20
0.8
-0.4
10
TYP
MAX
12.0
12.30
0.1
2.0
0.5
2.5
±0.02 ±0.05
55
0.5
MIN
4.88
TYP
MAX
5.0
5.12
0.1
2.0
0.5
2.5
±0.02 ±0.05
55
0.5
UNIT
V
%
%
%/°C
dB
V
V
μA
V
mA
mA
UNIT
V
%
%
%/°C
dB
V
V
μA
V
mA
mA
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QW-R102-048.B
278RXX
ELECTRICAL CHARACTERISTICS
(Cont.)
LINEAR INTEGRATED CIRCUIT
For 278R33 (V
IN
=5V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
Output Voltage
V
O
3.201
3.3
3.399
Load Regulation
Reg Load I
O
=5mA~2A
0.1
2.0
Line Regulation
Reg Line V
IN
=6~12V
0.5
2.5
±0.02 ±0.05
Temperature Coefficient of Output Voltage
T
C
V
O
T
J
=0~125°C
R·R
Ripple Rejection
45
55
Drop Out Voltage (Note)
V
D
I
O
=2A
0.5
Output ON State for Control Voltage
V
C(ON)
2.0
Output ON State for Control Current
I
C(ON)
V
C
=2.7V
20
Output OFF State for Control Voltage
V
C(OFF)
0.8
Output OFF State for Control Current
I
C(OFF)
V
C
=0.4V
-0.4
Quiescent Current
I
Q
I
O
=0
10
Note: Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
UNIT
V
%
%
%/°C
dB
V
V
μA
V
mA
mA
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QW-R102-048.B
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