UNISONIC TECHNOLOGIES CO., LTD
UR5516C
3A BUS TERMINATION
REGULATOR
DESCRIPTION
The
UTC UR5516C
is a low cost linear regulator designed to
provide a desired output voltage or termination voltage for various
applications by converting voltage supplies ranging from 1V to
6.0V. The desired output voltage could be programmable by two
external voltage divider resistors.
The
UR5516C
is capable of sourcing or sinking up to 2A of
current while regulating an output V
OUT
voltage to within 2%
(DDR-I), 3% (DDR-II) or less.
The UR5516C provides low profile 8-pin SOIC package to save
system space.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Provide bi-direction current
- Sourcing or sinking current up to 3A
* 1.25V/0.9V output for DDR I/II applications
* Fast transient response
* High output accuracy
- ±20mv over load, V
OUT
offset and temperature
* Adjustable output voltage by external resistors
* Current-limit protection
* On-chip thermal shutdown
* Shutdown for standby or suspend mode
*Pb-free plating product number: UR5516CL
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UR5516C-S08-R
UR5516CL-S08-R
UR5516C-S08-T
UR5516CL-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
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QW-R101-020,A
UR5516C
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NO.
1
2
3,4
5
6
7
8
PIN NAME
V
IN
V
FB
V
OUT
V
REF
V
CCA
AGND
PGND
DESCRIPTION
Input power
Feedback node for the V
OUT
Output voltage
Reference voltage input and chip enable
Voltage supply for internal circuits
Analog ground
Power ground
THERMAL DATA
PARAMETER
Thermal Resistance
SYMBOL
θ
JC
RATINGS
14
UNIT
°C/W
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QW-R101-020,A
UR5516C
BLOCK DIAGRAM
V
CCA
LINEAR INTEGRATED CIRCUIT
V
IN
Current Limit
V
REF
Thermal Limit
Control
+
-
V
OUT
GND
V
FB
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QW-R101-020,A
UR5516C
ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
RATINGS
UNIT
V
CCA
Supply Voltage, V
CCA
to GND
V
CCA
-0.2 ~ 7
V
V
IN
Supply Voltage, V
IN
to GND
V
IN
-0.2 ~ 3.9
V
Power Dissipation
P
D
Internally Limited
W
Junction Temperature
T
J
+150
°C
Storage Temperature
T
STG
-40 ~ +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.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
RANGES
UNIT
V
CCA
Supply Voltage (Note 1)
V
CCA
3.1 ~ 6
V
V
IN
Supply Voltage (Note 2)
V
IN
1.2 ~ 3.5
V
V
REF
Input Voltage
V
REF
0.85 ~ 1.75
V
V
OUT
Output Voltage (Note 3)
V
OUT
V
REF
± 0.02
V
V
OUT
Output Current (Note 4,5)
I
OUT
-3 ~ +3
A
Junction Temperature
T
J
0 ~ +125
°C
Note: 1. Please always keep V
CCA
-V
OUT
>1.9V for good regulation.
2. Please supply enough voltage to V
IN
for sourcing desired maximum output current. Please refer to the V
IN
Dropout Voltage vs. Output Current in the Typical Characteristics.
3. The V
OUT
is regulated to the V
REF
with additional voltage offset and load regulation except over-load
conditions.
4. The symbol “+” means the V
OUT
sources current to load; the symbol “-“ means the V
OUT
sinks current to
GND.
5. The max. I
OUT
varies with the T
J
and the voltages of V
IN
-V
OUT
and V
OUT
. Please refer to the Typical
Characteristics.
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QW-R101-020,A
UR5516C
otherwise specified)
PARAMETER
Output Voltage
System Accuracy
Offset Voltage (V
OUT
–V
REF
)
Load Regulation
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(T
J
=25°C, V
CCAL
=3.3V,V
IN
=2.5V/1.8V,V
REF
=0.5V
IN
,unless
SYMBOL
TEST CONDITIONS
MIN
V
OUT
I
OUT
=0A
Over temperature, V
OUT
offset, and load
-20
regulation
I
OUT
=+10mA
-20
V
O(OFF)
I
OUT
=-10mA
I
OUT
=+10mA ~ +3A
∆V
OUT
I
OUT
= -10mA ~ -3A
T
J
=25°C
+3
Sourcing Current (V
IN
=2.5V)
T
J
=125°C
T
J
=25°C
-3
Sinking Current (V
IN
=2.5V)
T
J
=125°C
I
LIMIT
T
J
=25°C +2.9
Sourcing Current (V
IN
=1.8V)
T
J
=125°C
T
J
=25°C
-2.9
Sinking Current (V
IN
=1.8V)
T
J
=125°C
T
SHDN
Rising T
J
T
HYS
I
OUT
=0A
1
I
CCA
I
OUT
=±3A (Normal Operation)
V
REF
=GND (Shutdown)
V
REF
=1.25V/0.9V (Normal Operation)
I
BIAS
V
REF
=GND (Shutdown)
V
SHDN
0.2
TYP
V
REF
MAX UNIT
V
20
20
2
2
+3.6
+3.1
-3.6
-3.1
+3.2
+2.6
-3.2
-2.6
183
42
2
50
2.0
200
20
0.35
mV
mV
%
Current Limit
A
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
V
CCA
Supply Current
V
REF
Bias Current (The current
flows out of V
REF
)
Shutdown Threshold Voltage
°C
°C
3
110
500
40
0.65
mA
nA
µA
V
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QW-R101-020,A
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