Termination Regulator. RP1210 Datasheet

RP1210 Regulator. Datasheet pdf. Equivalent

RP1210 Datasheet
Recommendation RP1210 Datasheet
Part RP1210
Description 1.8A Sink/Source Bus Termination Regulator
Feature RP1210; RP1210 Cost-Effective, 1.8A Sink/Source Bus Termination Regulator General Description The RP1210 i.
Manufacture RichPower
Datasheet
Download RP1210 Datasheet




RichPower RP1210
RP1210
Cost-Effective, 1.8A Sink/Source Bus Termination Regulator
General Description
The RP1210 is a simple, cost-effective and high-speed
linear regulator designed to generate termination voltage
in double data rate (DDR) memory system to comply with
the devices requirements. The regulator is capable of
actively sinking or sourcing up to 1.8A while regulating an
output voltage to within 20mV. The output termination
voltage can be tightly regulated to track VDDQ/2 by two
external voltage divider resistors or the desired output
voltage can be programmed by externally forcing the
REFEN pin voltage.
The RP1210 also incorporates a high-speed differential
amplifier to provide ultra-fast response in line/load transient.
Other features include extremely low initial offset voltage,
excellent load regulation, current limiting in bi-directions
and on-chip thermal shutdown protection.
Ordering Information
RP1210
Package Type
SP : SOP-8 (Exposed Pad-Option 2)
Operating Temperature Range
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richpower Green products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
Ideal for DDRII / DDRIII VTT Applications
Sink and Source Current :
1.8A Sink/Source @ VIN = 1.8V
1.5A Sink/Source @ VIN = 1.5V
1.2A Sink/Source @ VIN = 1.2V
Integrated Power MOSFETs
Generate Termination Voltage for DDR Memory
Interfaces
High Accuracy Output Voltage at Full-Load
Output Adjustment by Two External Resistors
Low External Component Count
Shutdown for Suspend to RAM (STR) Functionality
with High-Impedance Output
Current Limiting Protection
On-Chip Thermal Protection
RoHS Compliant
Stable with 2.2µF Output Ceramic Capacitor
Applications
Desktop PCs, Notebooks, and Workstations
Graphics Card Memory Termination
Set Top Boxes, Digital TVs, Printers
Embedded Systems
Active Termination Buses
DDRII/DDRIII Memory Systems
Pin Configurations
(TOP VIEW)
VIN
GND
REFEN
VOUT
8
27
GND
3 96
45
NC
NC
VCNTL
NC
SOP-8 (Exposed Pad-Option 2)
RP1210-01 June 2009
1



RichPower RP1210
RP1210
Typical Application Circuit
VCNTL = 5V
VIN = 1.8V/1.5V/1.2V
2N7002
EN
R1 VIN VCNTL
RP1210
REFEN
VOUT
R2 CSS
GND
CIN CCNTL
RTT
COUT RDUMMY
R1 = R2 = 100k, RTT = 50/ 33/ 25
RDUMMY = 1kas for VOUT discharge when VIN is not presented but VCNTL is presented
COUT = 10µF (Ceramic) under the worst case testing condition
CIN = 10µF, CCNTL = 1µF, CSS = 1nF to 0.1µF
Test Circuit
VIN = 1.8V/1.5V/1.2V VCNTL = 5V
0.9V/0.75V/0.6V
VIN VCNTL
RP1210
REFEN
VOUT
GND
VOUT
IL COUT V
Figure 1. Output Voltage Tolerance, VLOAD
VIN = 1.8V/1.5V/1.2V
0.9V/0.75V/0.6V
0.15V
VCNTL = 5V
A
VIN VCNTL
RP1210
REFEN
VOUT
GND
VOUT
0.9V
0V
RL COUT V
RL and COUT
Time deleay
Figure 2. Current in Shutdown Mode, ISTBY
2 RP1210-01 June 2009



RichPower RP1210
VIN = 1.8V/1.5V/1.2V VCNTL = 5V
0.9V/0.75V/0.6V
VIN VCNTL
RP1210
REFEN
VOUT
GND
VOUT
A
IL
COUT V
Figure 3. Current Limit for High Side, ILIM
Power Supply
with Current Limit
VIN = 1.8V1.5V/1.2V
VCNTL = 5V
VIN VCNTL
0.9V/0.75V/0.6V
RP1210
REFEN
VOUT
GND
A
IL
VOUT
COUT V
Figure 4. Current Limit for Low Side, ILIM
RP1210
VIN = 1.8V/1.5V/1.2V
0.9V/0.75V/0.6V
VREFEN
0.15V
0.9V/0.75V
VOUT
0V
RL and COUT
Time deleay
VCNTL = 5V
VIN VCNTL
RP1210
REFEN
VOUT
GND
RL
VOUT
COUT V
VOUT would be low if VREFEN < 0.15V
VOUT would be high if VREFEN > 0.4V
Figure 5. REFEN Pin Shutdown Threshold, VIH & VIL
RP1210-01 June 2009
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