Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR6515C
LINEAR INTEGRATED CIRCUIT
2A DDR BUS TERMINATION
REGULATOR
„
DESCRIPTION
The UR6515C is a linear regulator providing up to 2A 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 UR6515C 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.
„
FEATURES
*DDR1/ DDR2/DDR3 termination voltage applications
*Sink and Source Current
2A Contious 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
UR6515CL-SH2-R
UR6515CG-SH2-R
UR6515CL-SH2-T
UR6515CG-SH2-T
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Copyright © 2012 Unisonic Technologies Co., Ltd
Package
Packing
HSOP-8
HSOP-8
Tape Reel
Tube
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QW-R101-038.A
UR6515C
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LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
VIN
1
8
NC
GND
2
7
NC
VREF
3
6
VCNTL
VOUT
4
5
NC
GND
„
PIN DESCRIPTION
PIN NAME
VCNTL
GND
VIN
VREF
VOUT
PIN TYPE
I
I
I
O
PIN DESCRIPTION
Power supply pin for the internal control circuits
Ground pin
Power supply pin for the VOUT output
Reference voltage input and active-low shutdown control pin
Output voltage pin
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R101-038.A
UR6515C
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LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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UR6515C
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
VCNTL Control Voltage
VCNTL
+6
V
VIN Supply Voltage
VIN
+6
V
Power Dissipation (TA=25°C)
PD
1.33
W
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
Junction to Ambient (Note 1)
θJA
75
°C/W
Junction to Case
θJC
28
°C/W
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 3.3±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/1.5V, VCNTL=3.3V, VREF=1.25V/0.9V/0.75V, 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
ΔVLOAD
IOUT =±2A
PROTECTION
Current Limit
ILIMIT
VIN=2.5V/1.8V/1.5V
Thermal Shutdown Temperature
TSD
VCNTL=3.3V~5V
Thermal Shutdown Hysteresis
ΔTSD
VCNTL=3.3V~5V
VREF Shutdown
Enable
VIH
Shutdown Threshold
VIL
Shutdown
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
MAX
UNIT
1
50
2.5
90
mA
μA
20
20
mV
mV
-20
-20
2.2
125
A
°C
°C
170
35
0.6
0.2
V
V
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LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS CIRCUITS
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 + R 2
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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)
Output Voltage
Transient (mV)
Output Voltage
Transient (mV)
„
Output Current (A)
Output Current (A)
UR6515C
UNISONIC TECHNOLOGIES CO., LTD
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
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TYPICAL CHARACTERISTICS(Cont.)
„
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
4
2
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)
6
Time (1ms/Div)
8
6
4
2
Sink
VIN=1.8V, VCNTL=3.3V, VOUT=0.9V
10
8
6
4
2
0
0
Time (1ms/Div)
Time (1ms/Div)
Output Short Circuit Protection
Output Short Circuit Protection
VIN=1.5V, VCNTL=3.3V, VOUT=0.75V
Source
10
12
Output Short Current (A)
Output Short Current (A)
8
Time (1ms/Div)
10
12
10
0
0
12
Sink
VIN=2.5V, VCNTL=3.3V, VOUT=1.25V
12
8
6
4
2
VIN=1.5V, VCNTL=3.3V, VOUT=0.75V
Sink
10
8
6
4
2
0
0
Time (1ms/Div)
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Time (1ms/Div)
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TYPICAL CHARACTERISTICS(Cont.)
„
Output Voltage vs. Temperature
Output Voltage vs. Temperature
0.77
0.92
VIN=1.5V
0.915
Output Voltage, VOUT (V)
0.765
Output Voltage, VOUT (V)
VIN=1.8V
0.76
0.755
0.75
0.745
0.91
0.905
0.9
0.895
0.74
-50
0
-25
25
75
50
Temperature(°C)
100
125
0.89
-50
-25
0
50
25
75
Temperature(°C)
100
125
Output Voltage vs. Temperature
1.27
VIN=2.5V
Output Voltage, VOUT (V)
1.265
1.26
1.255
1.25
1.245
1.24
-50
-25
0
50
25
75
Temperature(°C)
100
125
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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