Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR10033
LINEAR INTEGRATED CIRCUIT
2 CHANNEL LOW-DROPOUT
VOLTAGE REGULATOR

FEATURES
* Dual output: ADJ/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.

TO-252-5
ORDERING INFORMATION
Ordering Number
Lead Free
UR10033-TN5-R

1
Halogen Free
UR10033L-TN5-R
Package
Packing
TO-252-5
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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
LINEAR INTEGRATED CIRCUIT
PIN DISCRIPTION
PIN NO.
1
2
3
4
5

PIN NAME
VCC
ADJ
GND
VO1
VO2
FUNCTION
Power Supply
ADJ Output Voltage Feedback control
Ground
ADJ Output
3.3V Output
BLOCK DIAGRAM
VCC
PIN 1
VCC
Reference
Voltage
VCC
+
VO1
Current
Limit
PIN 4
Sat.
Prevention
ADJ
PIN 2
VCC
VCC
+
VO2
Thermal
Shut Down
Current
Limit
PIN 5
Sat.
Prevention
PIN 3
GND
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
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA = 25°C, unless otherwise specified)
PARAMETER
RATINGS
UNIT
18
V
TA = 25°C
1000
mW
Power Dissipation
PD
Derating above 25C
8
mW/C
Junction Temperature
TJ
150
C
Operating Temperature Range
TOPR
-40 ~ +85
C
Storage Temperature Range
TSTG
-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.
Supply Voltage

OPERATING RATINGS (TA = 25°C, unless otherwise specified)
PARAMETER
Input Voltage
ADJ Output current
3.3V Output current

SYMBOL
VCC
SYMBOL
VCC
IO1
IO2
MIN
4.0
MAX
16.0
1
1
UNIT
V
A
A
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, TA = 25°C, VCC=6V unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
Bias Current
IB
IO1=0mA, IO2=0mA
0.8
1.5
mA
ADJ Output
Feedack Voltage
VADJ
IO1=500mA
1.225 1.25 1.275
V
Dropout Voltage 1
△VD1
IO1=500mA
0.8
V
Peak Output Current 1
IO1
1.0
1.7
A
f=120Hz, ein=1Vrms
50
58
dB
Ripple Rejection 1
R.R.1
IO1=200mA
Line Regulation 1
△VLINE1 VCC=VOUT+1V ~ 16V, IO1=500mA
25
mV
Load Regulation 1
△VLOAD1 IO1=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
TCVO1
IO1=5mA, TJ=0 ~ 125°C
±0.01
%/°C
Voltage 1(Note1)
Short circuit Output Current 1
IOS1
VCC=16V
200
mA
3.3V Output
Output Voltage 2
VO2
IO2=500mA
3.234 3.30 3.366
V
Peak Output Current 2
IO2
1.0
1.7
A
f=120Hz, ein=1Vrms
50
58
dB
Ripple Rejection 2
R.R.2
IO2=200mA
Line Regulation 2
△VLINE2 VCC=4V ~ 16V, IO1=500mA
25
mV
Load Regulation 2
△VLOAD2 IO2=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
TCVO2
IO2=5mA, TJ=0 ~ 125°C
±0.01
%/°C
Voltage 2(Note1)
Short circuit Output Current 2
IOS2
VCC=16V
200
mA
Notes: 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 TA≒TJ, and variations in the parameter of all measurement
(except for temperature coefficient of output voltage)caused by temperature change are not considered.
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LINEAR INTEGRATED CIRCUIT
POWER DISSIPATION

STANDARD APPLICATION CIRCUIT
Power Dissipation, PD (W)

Vo1
+
22μF
Vcc
GND
Vo2
+
22μF
OR

TEST CIRCUIT FOR EACH CONDITION

TEST CIRCUIT FOR RIPPLE REJECTION RATIO
UNISONIC TECHNOLOGIES CO., LTD
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1Ω
OR
1Ω
10μF
Ceramic
10μF
Ceramic
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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=VO+1V. The cannot be guaranteed at other voltages in the operating range of VO+1V ~ 16.0V,
homever, the variation will be small.
Input /Output Characteristic
VOUT
Dropout Region
Vin
Off Region
2V
Regulation Region
Recommended Operating Region
3V
(Typ.TA=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.
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APPLICATION INFORMATION(Cont.)
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 TJ(max)=150°C.
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.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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