Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR13325
LINEAR INTEGRATED CIRCUIT
2 CHANNEL LOW-DROPOUT
VOLTAGE REGULATOR
„
FEATURES
* Dual output: 3.3V/1A, 2.5V/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: UR13325L
„
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UR13325-TN5-R
UR13325L-TN5-R
UR13325-TN5-T
UR13325L-TN5-T
Package
Packing
TO-252-5
TO-252-5
Tape Reel
Tube
UR13325L-TN5-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
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Copyright © 2008 Unisonic Technologies Co., Ltd
(1) R: Tape Reel, T: Tube
(2) TN5: TO-252-5
(3) L: Lead Free Plating, Blank: Pb/Sn
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LINEAR INTEGRATED CIRCUIT
PIN DISCRIPTION
PIN NO.
1
2
3
4
5
PIN NAME
VCC
N.C.
GND
Vo1
Vo2
FUNCTION
Power Supply
Not internally connected
Ground
3.3V Output
2.5V Output
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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
RATINGS
UNIT
18
V
1000
mW
PD
8
mW/°C
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.
Supply Voltage
Power Dissipation
Derating above 25°C
„
RECOMMENDED OPERATING RATINGS (Ta=25℃)
PARAMETER
Input Voltage
3.3V Output current
2.5V Output current
„
SYMBOL
VCC
SYMBOL
VCC
Io1
Io2
MIN
3.0
MAX
16.0
1
1
UNIT
V
A
A
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, Ta=25℃, VCC=5V unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Bias Current
IBIAS
Io1=0mA, Io2=0mA
2.0
2.3
mA
3.3V Output
Output Voltage 1
Vo1
Io1=500mA
3.234 3.30 3.366
V
Dropout Voltage 1
△VD1
Io1=500mA, VCC =3.135V
0.25
0.5
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 =4V ~ 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
Short Circuit Output Current 1
IOS1
VCC =16V
600
mA
2.5V Output
Output Voltage 2
Vo2
Io2=500mA
2.450 2.50 2.550
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, 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
Short Circuit Output Current 2
IOS2
VCC =16V
450
mA
Note: 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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POWER DISSIPATION
12.5
Power Dissipation, PD (W)
„
LINEAR INTEGRATED CIRCUIT
(1) 10.0
10
(1) With infinitc Aluminum heat sink
θjc=12.5 (℃/W)
(2) With no heat sink
θja=125.0(℃/W)
7.5
5
2.5
0
(2) 1.0
0
25
50
75
100
125
150
Ambient Temperature, Ta (℃)
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LINEAR INTEGRATED CIRCUIT
„
APPLICATION CIRCUIT
„
TEST CIRCUIT
FOR EACH CONDITION
FOR RIPPLE REJECTION RATIO
Vcc
GND
ein
VIN
0.33µ F
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Vo1
or
Vo2
22µ F
+
V
Io
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LINEAR INTEGRATED CIRCUIT
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=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
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 page 4. 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 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.
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LINEAR INTEGRATED CIRCUIT
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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