Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UR6517
Preliminary
LINEAR INTEGRATED CIRCUIT
1.8A DDR BUS TERMINATION
REGULATOR

DESCRIPTION
The UR6517 is a linear regulator providing up to 1.8A transient
current sourcing and sinking capability for DDR bus terminator
applications while regulating an output voltage to within 20mV. It
contains a high speed operational amplifier which provides fast load
transient response and only requires 10uF of ceramic output
capacitance.
The UR6517 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.

HSOP-8
FEATURES
*DDR1/ DDR2/DDR3/DDR4 termination voltage applications
*Sink and Source Current
DDR2 1.8A Sink/Source @ VIN=1.8V
DDR3 1.5A Sink/Source @ VIN=1.5V
LPDDR3 1.2A Sink/Source @ VIN=1.35V
DDR4 1.2A Sink/Source @ VIN=1.2V
*Low output voltage offset within 20mV
*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
UR6517G-SH2-R
Package
HSOP-8
Packing
Tape Reel
UR6517G-SH2-R
(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) SH2: HSOP-8
(3)Green Package
(3) G: Halogen Free and Lead Free
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Copyright © 2015 Unisonic Technologies Co., Ltd
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UR6517
Preliminary

MARKING

PIN CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
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
O
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
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www.unisonic.com.tw
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UR6517

Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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www.unisonic.com.tw
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UR6517

Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
VCNTL Control Voltage
VCNTL
-0.3~+6
V
VIN Supply Voltage
VIN
-0.3~+6
V
Power Dissipation (TA=25°C)
PD
1.163
W
Junction Temperature
TJ
150
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Notes: 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
Maximum Junction to Ambient (Note)
θJA
86
°C/W
Maximum Junction to Case
θJC
15
°C/W
Note: 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)
PARAMETER
SYMBOL
RATINGS
VCNTL Control Voltage
VCNTL
5±5%
VIN Supply Voltage
VIN
1V~5.5V
Junction Temperature
TJ
-40~+125
Ambient Temperature
TA
-40~+85
Note: All voltage values are with respect to the network ground terminal unless otherwise noted.

UNIT
V
V
°C
°C
ELECTRICAL CHARACTERISTICS (TA=25°C, unless otherwise specified)
(VIN=1.8V/1.5V, VCNTL=5V, VREF=0.9V/0.75V, COUT = 10µF (Ceramic))
PARAMETER
SYMBOL
TEST CONDITIONS
INPUT CURRENT
Operation Current of VCNTL
ICNTL
IOUT =0A
VCNTL Power On Reset
VPOR
VCNTL Rising
Standby Current
ISTB
VREF<0.2V, RLOAD=180Ω
OUTPUT VOLTAGE (DDR/DDR II/DDR III)
Output Voltage Offset (VREF-VOUT)
VOS
IOUT =0A
VIN=1.8V,IOUT =±1.8A
VIN=1.5V,IOUT =±1.5A
Load Regulation
∆VLOAD
VIN=1.35V,IOUT =±1.2A
VIN=1.2V,IOUT =±1.2A
PROTECTION
Current Limit
ILIMIT
VIN=1.8V/1.5V
VIN=1.8V/1.5V/1.35V/1.2V
Short Circuit Current
ISHORT
VOUT <0.2V
Thermal Shutdown Temperature
TSD
VCNTL=3.3V~5V
Thermal Shutdown Hysteresis
∆TSD
VCNTL=3.3V~5V
VREF Shutdown
VIH
Enable
Shutdown Threshold
Shutdown
VIL
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
MAX
UNIT
0.7
3.6
20
2.5
90
mA
V
μA
-20
20
mV
-20
20
mV
125
2.5
A
1.5
A
170
35
°C
°C
0.4
0.15
V
V
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
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS CIRCUITS
R1=R2=100KΩ, COUT=10μF(Ceramic)under the worst case testing condition
CSS=1nF to 0.1μF, CIN=10μF(Low ESR), CCNTL=1μF
R2
VREF =
VIN ( V ) , VOUT track VREF
R1 + R2
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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