UNISONIC TECHNOLOGIES CO., LTD
URXX20
2A OUTPUT TYPE LOW
POWER-LOSS VOLTAGE
REGULATOR
FEATURES
* Low power-loss(Dropout voltage: 0.5V(max) at I
OUT
=2.0A)
* 2.0A output type
* Output voltage precision: ±3.0%
* Built-in ON/OFF control function and over-current protection
circuit.
* Thermal shutdown protection.
1
TO-252
LINEAR INTEGRATED CIRCUIT
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
URXX20L-TN3-D-T
URXX20G-TN3-D-T
URXX20L-TN3-D-R
URXX20G-TN3-D-R
Note: Pin Assignment: I: INPUT G: GND O: OUTPUT
Package
TO-252
TO-252
Pin Assignment
1
2
3
I
G
O
I
G
O
Packing
Tube
Tape Reel
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QW-R102-052.A
URXX20
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
LINEAR INTEGRATED CIRCUIT
MARKING
TO-252
12 :12V
BLOCK DIAGRAM
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QW-R102-052.A
URXX20
PARAMETER
SYMBOL
Input Voltage(Note1)
V
IN
Output Current
I
OUT
Power Dissipation
P
D
Junction Temperature (Note2)
T
J
Operating Temperature
T
OPR
Storage Temperature
T
STG
Note 1: All are open except GND and applicable terminals.
Note
2: Overheat protection may operate at 125≦T
J
≦150°C
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C, unless otherwise specified.)
RATINGS
20
2.0
0.7
150
-40 ~ +85
-40 ~ +150
UNIT
V
A
W
°C
°C
°C
ELECTRICAL CHARACTERISTICS
(Refer to the test circuits, unless otherwise specified, T
A
=25°C)
For UR1220(12V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX
Output Voltage
V
OUT
V
IN
=14V, I
OUT
=1A
11.64 12.0 12.36
Line Regulation
ΔV
OUT
V
IN
=13~19V, I
OUT
=5mA
0.5
2.5
Load Regulation
ΔV
OUT
V
IN
=14V, I
OUT
=5mA~2.0A
0.1
2.0
Temperature Coefficient of Output Voltage
T
C
V
O
T
J
=0~125°C, I
OUT
=5mA
±0.02
Ripple Rejection
RR
Refer to Fig.2
45
55
Dropout Voltage
V
D
(Note 1), I
OUT
=2A
0.5
Quiescent Current
I
Q
I
OUT
=0A, V
IN
=14V
10
Note: Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
UNIT
V
%
%
%/°C
dB
V
mA
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QW-R102-052.A
URXX20
TEST CIRCUITS
LINEAR INTEGRATED CIRCUIT
Fig.1
1
ei
47
μF
0.33
μF
V
IN
2
+
R
L
3
I
O
V eo
+
V
IN
=12V(UR1020)
f=120Hz
ei=0.5Vrms
Io=0.5A
RR=20log (ei/eo)
TYPICAL APPLICATION
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QW-R102-052.A
URXX20
TYPICAL CHARACTERISTICS
Fig.3 Output Voltage Deviation vs .Junction
Temperature (UR1220)
Vo (mV)
250
200
150
100
50
0
-50
-100
-150
-200
-25
0
25
50
75
100
125
0
LINEAR INTEGRATED CIRCUIT
Fig.4 Output Voltage vs .Input Voltage
(UR1220)
20
V
IN
=18V
Io=0.5A
Output voltage, Vo (V)
15
Output voltage deviation,
R
L
=∞Ω
10
R
L
=12Ω
R
L
=6Ω
5
0
5
10
15
20
25
Junction temperature, T
J
(°C)
Input voltage, V
IN
(V)
Fig.5 Circuit Operating Current vs .Input
Voltage (UR1220)
80
0.5
Fig.6 Dropout Voltage vs .Junction
Temperature (UR1220)
Circuit operating current, I
BIAS
(mA)
Dropout voltage, Vi-o (V)
60
0.4
0.3
40
0.2
20
R
L
=6Ω
R
L
=12Ω
0.1
0
R
L
=∞Ω
0
5
10
15
20
25
0
-25
0
25
50
75
100
125
Input voltage, V
IN
(V)
Junction temperature, T
J
(°C)
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QW-R102-052.A
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