UNISONIC TECHNOLOGIES CO., LTD
UR13318
2 CHANNEL LOW-DROPOUT
VOLTAGE REGULATOR
1
LINEAR INTEGRATED CIRCUIT
FEATURES
*Dual Output: 3.3V/1A, 1.8V/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.
TO-252-5
1
TO-263-5
*Pb-free plating product number: UR13318L
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UR13318-TN5-R
UR13318L-TN5-R
UR13318-TN5-T
UR13318L-TN5-T
UR13318-TQ5-R
UR13318L-TQ5-R
UR13318-TQ5-T
UR13318L-TQ5-T
Package
TO-252-5
TO-252-5
TO-263-5
TO-263-5
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2007 Unisonic Technologies Co., Ltd
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QW-R102-018.D
UR13318
ABSOLUTE MAXIMUM RATINGS
(Ta=25℃)
PARAMETER
SYMBOL
Vcc
LINEAR INTEGRATED CIRCUIT
RATINGS
UNIT
Supply Voltage
18
V
Ta=25℃
1000
mW
Power Dissipation
P
D
Derating above 25°C
8
mW/°C
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.
RECOMMENDED OPERATING RATINGS
(Ta=25℃)
PARAMETER
Input Voltage
3.3V Output current
1.8V Output current
SYMBOL
Vcc
I
O1
I
O2
MIN
3.0
MAX
16.0
1
1
UNIT
V
A
A
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, Ta=25℃, V
CC
=5V unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
Bias Current
I
BIAS
I
o1
=0mA, I
o2
=0mA
0.8
1.5
mA
3.3V Output
Output Voltage 1
V
o1
I
o1
=500mA
3.234 3.30 3.366
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
f=120Hz, ein=1Vrms
50
58
dB
Ripple Rejection 1
R.R.1
I
o1
=200mA
Line Regulation 1
△
V
LINE1
Vcc=4V ~ 16V, I
o1
=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 (Note1)
Short Circuit Output Current 1
I
OS1
Vcc=16V
270
mA
1.8V Output
Output Voltage 2
V
o2
I
o2
=500mA
1.764 1.80 1.832
V
Peak Output Current 2
I
o2
1.0
1.7
A
f=120Hz, ein=1Vrms
50
58
dB
Ripple Rejection 2
R.R.2
I
o2
=200mA
Line Regulation 2
△
V
LINE2
Vcc=4V ~ 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 (Note1)
Short Circuit Output Current 2
I
OS2
Vcc=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
3 of 6
QW-R102-018.D
UR13318
APPLICATION INFORMATION
LINEAR INTEGRATED CIRCUIT
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=5V. The cannot be guaranteed at other voltages in the operating range of 3.0V~16.0V, however, the
variation will be small.
●
Input /Output characteristic
V
OUT
Dropout Region Regulation Region
V
in
Off Region
2V
(Typ.T
A
=25℃)
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 Vcc 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.
Thermal Protection Circuit
A thermal shut down circuit (T.S.D.) is built into the IC to prevent damage due to overheating, Therefore, all the
outputs are turned off when the T.S.D. circuit is activated and are turned on when the temperature recedes to the
specified level. However, the T.S.D. circuit is only for extreme conditions and the regulator circuit should still be
designed for the IC not to exceed T
J(max)
=150
℃
.
Grounding
It is recommended that every capacitor (bypass and output capacitors) is grounded to PIN3 using single-point
connections.
Electromagnetic Fields
The IC is susceptible to strong electromagnetic fields and may cause malfunction. Therefore, caution should be
used when placing it on the PCB.
Protection Diodes
It is recommended that protection diodes be used when the output is connected to an inductive load.
Recommended Operating Region
3V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-018.D
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