Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR15033
LINEAR INTEGRATED CIRCUIT
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.
*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
Packing
TO-252-5
TO-252-5
Tape Reel
Tube
UR15033L-TN5-R
„
(1)Packing Type
(1) R: Tape Reel, T: Tube
(2)Package Type
(3)Lead Plating
(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
VO1
VO2
PIN FUNCTION
Power Supply
Not Internally Connected
Ground
5.0V Output
3.3V Output
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UR15033
„
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
Vcc
PIN 1
Vcc
Reference
Voltage
Vcc
+
Vo1
Current
Limit
PIN 4
Sat.
Prevention
Vcc
Vcc
+
Vo2
Thermal
Shut Down
Current
Limit
PIN 5
Sat.
Prevention
NC
PIN 2
PIN 3
GND
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„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25℃)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
18
V
Power Dissipation
PD
1
W
Junction Temperature
TJ
150
°C
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
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.
„
RECOMMANDED OPERATING RATINGS (TA=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, TA=25℃, 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
5.0V Output
Output Voltage 1
Vo1
Io1=500mA
4.9
5.0
5.1
V
Dropout Voltage 1
△VD1
Io1=500mA
0.25
0.5
V
Peak Output Current 1
Io1
1.0
1.7
A
Ripple Rejection 1
R.R.1
f=120Hz, ein=1Vrms, Io1=200mA
50
58
dB
Line Regulation 1
△VLINE1 Vcc=6V ~ 16V, Io1=500mA
5
30
mV
Load Regulation 1
△VLOAD1 Io1=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
TCVO1
Io1=5mA, TJ=0 ~ 125℃
±0.01
%/℃
Voltage 1 (Note 1)
Short circuit Output Current 1
IOS1
Vcc=16V
270
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
Ripple Rejection 2
R.R.2
f=120Hz, ein=1Vrms, Io2=200mA
50
58
dB
Line Regulation 2
△VLINE2 Vcc=6V ~ 16V, Io2=500mA
5
30
mV
Load Regulation 2
△VLOAD2 Io2=0mA ~ 1A
30
75
mV
Temperature Coefficient of Output
TCVO2
Io2=5mA, TJ=0 ~ 125℃
±0.01
%/℃
Voltage 2 (Note 1)
Short circuit Output Current 2
IOS2
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 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
Vo1
Vcc
GND
22µF
Vo2
22µF
„
+
+
OR
10µF
Ceramic
1O
OR
1O
10µF
Ceramic
TEST CIRCUIT FOR EACH CONDITION
V
Vcc
GND
0.33µF
A
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Vo1
or
Vo2
22µF
+
A
Io
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LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT FOR RIPPLE REJECTION RATIO
Vcc
GND
ein
VIN
„
0.33µF
Vo1
or
Vo2
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 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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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℃.
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.
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www.unisonic.com.tw
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