Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR6515A
LINEAR INTEGRATED CIRCUIT
3A DDR BUS TERMINATION
REGULATOR
„
DESCRIPTION
The UR6515A is a linear regulator providing up to 3A
transient peak current sourcing and sinking capability for DDR
SDRAM bus terminator applications while regulating an output
voltage to within 40mV. It contains a high speed operational amplifier
which provides fast load transient response and only requires 10uF
of ceramic output capacitance.
The UR6515A output termination voltage tracks the reference
voltage applied at VREF pin. A resistor divider connected to VIN, GND
and VREF pins is used to force the reference voltage to VREF pin.
Additional features include current limiting protection and thermal
shutdown protection.
„
1
TO-252-5
1
TO-263-5
FEATURES
*DDR1/ DDR2 termination voltage applications
*Low output voltage offset within 20mV
*Source and sink 3A peak current
*Adjustable output voltage by external resistors
*Integrated power MOS devices
*Suspend to RAM(STR) functionality
*Current Limiting Protection
*Thermal Shutdown Protection
*Cost-effective and easy to use
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UR6515L-TN5-R
UR6515G-TN5-R
UR6515L-TQ5-R
UR6515G-TQ5-R
UR6515L-TQ5-T
UR6515G-TQ5-T
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
TO-252-5
TO-263-5
TO-263-5
Tape Reel
Tape Reel
Tube
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UR6515A
LINEAR INTEGRATED CIRCUIT
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PIN CONFIGURATIONS
„
PIN DESCRIPTION
PIN NAME
VIN
GND
VCNTL
VREF
VOUT
PIN TYPE
I
O
I
I
O
PIN DESCRIPTION
Power supply pin for the VOUT output
Ground pin
Power supply pin for the internal control circuits
Reference voltage input and active-low shutdown control pin
Output voltage pin
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www.unisonic.com.tw
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UR6515A
„
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
VCNTL Control Voltage
VCNTL
7
V
VIN Supply Voltage
VIN
7
V
TO-252-5
1.471
Power Dissipation (Ta=25°C)
PD
W
TO-263-5
1.923
Junction Temperature
TJ
125
°C
Storage Temperature
TSTG
-65 ~ +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.
„
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
UNIT
TO-252-5
68
Junction to Ambient (Note 1)
θJA
°C/W
TO-263-5
52
TO-252-5
8
Junction to Case
θJC
°C/W
TO-263-5
7.7
Note: 1. θJA is measured in the natural convection at Ta = 25°C on a high effective thermal conductivity test board of
JEDEC 51-7 thermal measurement standard
„
RECOMMENDED OPERATING CONDITIONS (Note 1)
PARAMETER
SYMBOL
RATINGS
VCNTL Control Voltage
VCNTL
5 or 3 ± 5%
VIN Supply Voltage
VIN
2.5~1.5 ± 3%
VREF Input Voltage
VREF
1.25~0.75 ± 3%
Junction Temperature
TJ
-40~+125
Notes: 1. All voltage values are with respect to the network ground terminal unless otherwise noted.
2. The VOUT tracks the VREF with additional voltage offset and load regulation.
„
UNIT
V
V
V
°C
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified)
(VIN=2.5V/1.8V, VCNTL=3.3V, VREF=1.25V/0.9V, COUT = 10µF (Ceramic))
PARAMETER
SYMBOL
TEST CONDITIONS
INPUT CURRENT
Operation Current of VCNTL
ICNTL
IOUT =0A
Standby Current
ISTB
VREF<0.2V, RLOAD=180Ω
OUTPUT VOLTAGE (DDR/DDR II/DDR III)
Output Voltage Offset (VREF-VOUT)
VOS
IOUT =0A
Load Regulation(DDR1/2)
ΔVLOAD
IOUT =±1.5A
PROTECTION
Current Limit
ILIMIT
VIN=2.5V/1.8V
Thermal Shutdown Temperature
TSD
VCNTL=3.3V~5V
Thermal Shutdown Hysteresis
ΔTSD
VCNTL=3.3V~5V
VREF Shutdown
VIH
Enable
Shutdown Threshold
VIL
Shutdown
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
MAX
UNIT
1
50
2.5
90
mA
μA
0.8/1.2
20
2/3
mV
%
-20
3
125
A
°C
°C
150
50
0.8
0.2
V
V
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LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS CIRCUITS
3.3V
VOUT
VOUT 5
COUT
VREF 4
CSS
VCNTL 3
CCNTL
GND 2
VIN 1
R1
R2
CIN
2.5V/1.8V
Enable
R1=R2=100KΩ, COUT=10μF(Ceramic)+1000μF under the worst case testing condition
CSS=1μF, CIN=470μF(Low ESR), CCNTL=47μF
R2
VREF =
VIN ( V ) , VOUT track VREF
R1 + R2
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Output Voltage
Transient (mV)
Output Voltage
Transient (mV)
Output Current (A)
Output Current (A)
Output Voltage
Transient (mV)
Output Voltage
Transient (mV)
„
Output Current (A)
Output Current (A)
UR6515A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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TYPICAL CHARACTERISTICS(Cont.)
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Output Short Circuit Protection
VIN=2.5V, VCNTL=3.3V, VOUT=1.25V
Output Short Circuit Protection
Source
Output Short Current (A)
Output Short Current (A)
10
8
6
4
2
8
6
4
2
Time (1ms/Div)
Time (1ms/Div)
Output Short Circuit Protection
Output Short Circuit Protection
VIN=1.8V, VCNTL=3.3V, VOUT=0.9V
Source
12
Output Short Current (A)
Output Short Current (A)
10
0
0
12
Sink
VIN=2.5V, VCNTL=3.3V, VOUT=1.25V
12
10
8
6
4
2
VIN=1.8V, VCNTL=3.3V, VOUT=0.9V
Sink
10
8
6
4
2
0
0
Time (1ms/Div)
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Time (1ms/Div)
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
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Output Voltage vs. Temperature
1.27
Output Voltage vs. Temperature
0.92
VIN=2.5V
0.915
Output Voltage, VOUT (V)
Output Voltage, VOUT (V)
1.265
VIN=1.8V
1.26
1.255
1.25
1.245
0.91
0.905
0.9
0.895
1.24
-50
-25
0
50
25
75
Temperature(°C)
100
125
UNISONIC TECHNOLOGIES CO., LTD
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0.89
-50
-25
0
50
25
75
Temperature(°C)
100
125
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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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www.unisonic.com.tw
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