UNISONIC TECHNOLOGIES CO., LTD
UR15033
2 CHANNEL LOW-DROPOUT
VOLTAGE REGULATOR
FEATURES
*Dual output: 5.0V/1A, 3.3V/1A.
*Output voltage precision of ±2%.
*Output consists of PNP power transistor with low-dropout
voltage.
*Built-in over current protection circuit (OCP).
*Built-in thermal shut down circuit (TSD).
*Ideal for hard disk drives applications.
LINEAR INTEGRATED CIRCUIT
*Pb-free plating product number: UR15033L
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UR15033-TN5-R
UR15033L-TN5-R
UR15033-TN5-T
UR15033L-TN5-T
Package
TO-252-5
TO-252-5
Packing
Tape Reel
Tube
UR15033L-TN5-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) TN5: TO-252-5
(3) L: Lead Free Plating, Blank: Pb/Sn
PIN DESCRIPTIONS
PIN NO.
1
2
3
4
5
PIN NAME
Vcc
N.C.
GND
V
O1
V
O2
PIN FUNCTION
Power Supply
Not Internally Connected
Ground
5.0V Output
3.3V Output
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Copyright © 2008 Unisonic Technologies Co., Ltd
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QW-R102-020.D
UR15033
BLOCK DIAGRAM
Vcc
PIN 1
Vcc
Reference
Voltage
+
-
LINEAR INTEGRATED CIRCUIT
Vcc
Vo
1
Current
Limit
Sat.
Prevention
PIN 4
Vcc
Vcc
+
-
Vo
2
Thermal
Shut Down
Current
Limit
Sat.
Prevention
PIN 5
NC
PIN 2
PIN 3
GND
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QW-R102-019.D
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ABSOLUTE MAXIMUM RATINGS
(T
A
=25℃)
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
18
V
Power Dissipation
P
D
1
W
Junction Temperature
T
J
150
°C
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-55 ~ +150
°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.
RECOMMANDED OPERATING RATINGS
(T
A
=25℃)
PARAMETER
Input Voltage
5.0V Output Current
3.3V Output Current
SYMBOL
Vcc
Io1
Io2
MIN
4.0
TYP
MAX
16.0
1
1
UNIT
V
A
A
ELECTRICAL CHARACTERISTICS
(refer to the test circuit, T
A
=25℃, V
CC
=6V unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
Bias Current
I
B
I
o1
=0mA, I
o2
=0mA
0.8
1.5
mA
5.0V Output
Output Voltage 1
V
o1
I
o1
=500mA
4.9
5.0
5.1
V
Dropout Voltage 1
△
V
D1
I
o1
=500mA
0.25
0.5
V
Peak Output Current 1
I
o1
1.0
1.7
A
Ripple Rejection 1
R.R.1
f=120Hz, ein=1Vrms, I
o1
=200mA
50
58
dB
Line Regulation 1
△
V
LINE1
Vcc=6V ~ 16V, Io1=500mA
5
30
mV
Load Regulation 1
△
V
LOAD1
I
o1
=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
T
CVO1
I
o1
=5mA, T
J
=0 ~ 125℃
±0.01
%/℃
Voltage 1 (Note 1)
Short circuit Output Current 1
I
OS1
Vcc=16V
270
mA
3.3V Output
Output Voltage 2
V
o2
I
o2
=500mA
3.234 3.30 3.366
V
Peak Output Current 2
I
o2
1.0
1.7
A
Ripple Rejection 2
R.R.2
f=120Hz, ein=1Vrms, I
o2
=200mA
50
58
dB
Line Regulation 2
△
V
LINE2
Vcc=6V ~ 16V, I
o2
=500mA
5
30
mV
Load Regulation 2
△
V
LOAD2
I
o2
=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
T
CVO2
I
o2
=5mA, T
J
=0 ~ 125℃
±0.01
%/℃
Voltage 2 (Note 1)
Short circuit Output Current 2
I
OS2
V
CC
=16V
270
mA
Note: 1. Design Guarantee. (Outgoing inspection is not done on all products.)
2. This product is not designed for protection against radioactive rays.
3. All characteristic are measured with a capacity across the input (0.33μF) and the output (22μF).
Measurement is done at T
A
≒T
J
, and variations in the parameter of all measurement (except for
Temperature Coefficient of Output Voltage) caused by temperature change are not considered.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-019.D
UR15033
POWER DISSIPATION
LINEAR INTEGRATED CIRCUIT
STANDARD APPLICATION CIRCUIT
Vo
1
Vcc
GND
Vo
2
22µF
+
OR
22µF
1O
+
OR
1O
10µF
Ceramic
10µF
Ceramic
TEST CIRCUIT FOR EACH CONDITION
V
Vo
1
or
Vo
2
+
Vcc
GND
0.33µF
A
22µF
A
Io
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TEST CIRCUIT FOR RIPPLE REJECTION RATIO
LINEAR INTEGRATED CIRCUIT
Vcc
ein
V
IN
0.33µF
GND
Vo
1
or
Vo
2
22µF
+
V
Io
APPLICATION INFORMATION
Operation Supply Voltage Range
The circuit functionality is guaranteed within operation of ambient temperature range, as long as it is within
operation supply voltage range. The standard electrical characteristic values are guaranteed at the test circuit
voltage of Vcc=6V. The cannot be guaranteed at other voltages in the operating range of 4.0V ~ 16.0V, homever, the
variation will be small.
For proper regulation, this device must be operated in the Recommended Operating Region shown above.
Power Dissipation
Refer to the thermal duration characteristics shown in Fig.3. Also, be sure to use this IC within a power dissipation
rage allowing enough margins.
Output and Bypass Capacitor
To prevent oscillations, place the output capacitor between the output pin and GND for both channel. There is a
possibility for oscillation if capacitor's value changes due to temperature, voltage, etc. More than 22μF electrolytic
capacitor is recommended. If an extremely large value of (over 1000μF) is used, it may cause oscillations at low
frequency. In case of using ceramic capacitor (it is recommended more than 10μF) connect with 1Ω resistance
serially as ESR. For the bypass capacitor, a 0.33μF capacitor placed as close to V
CC
pin and GND pin as possible is
recommended.
Over- current Protection Circuit
The over-current protection circuits are built in at the outputs. They protect the IC from being damaged when the
load is short-circuited or subjected to an over current condition. This protection circuits perform holdback current
limiting.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-019.D
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