參數(shù)資料
型號: RT9173BGS
廠商: Richtek Technology Corporation
英文描述: 2A Bus Termination Regulator
中文描述: 甲總線終端穩(wěn)壓器
文件頁數(shù): 1/13頁
文件大小: 273K
代理商: RT9173BGS
RT9173B
1
DS9173B-09 March 2007
www.richtek.com
Features
Pin Configurations
Applications
2A Bus Termination Regulator
Ordering Information
RT9173B
General Description
The RT9173B regulator is designed to convert voltage
supplies ranging from 1.7V to 6V into a desired output
voltage of which adjusted by two external voltage divider
resistors. The regulator is capable of sourcing or sinking
up to 2A of current while regulating an output voltage to
within 40mV.
(TOP VIEW)
The RT9173B, used in conjunction with series termination
resistors, provides an excellent voltage source for active
termination schemes of high speed transmission lines as
those seen in high speed memory buses and distributed
backplane designs. The voltage output of the regulator can
be used as a termination voltage for DDR SDRAM.
Current limits in both sourcing and sinking mode, plus on-
chip thermal shutdown make the circuit tolerant of the
output fault conditions.
The RT9173B are available in the popular 5-lead TO-252
and fused SOP-8 (the multiple V
CNTL
pins on the SOP-8
package are internally connected but lowest thermal
resistance) surface mount packages.
z
Support Both DDR I (1.25V
TT
) and DDR II (0.9V
TT
)
Requirements
z
SOP-8 and TO-252-5 Packages
z
Capable of Sourcing and Sinking Current
z
Current-limiting Protection
z
Thermal Protection
z
Integrated Power MOSFETs
z
Generates Termination Voltages for SSTL-2
z
High Accuracy Output Voltage at Full-Load
z
Adjustable V
OUT
by External Resistors
z
Minimum External Components
z
Shutdown for Standby or Suspend Mode Operation
with High-impedance Output
z
RoHS Compliant and 100% Lead (Pb)-Free
z
DDR Memory Termination Supply
z
Active Termination Buses
z
Desktop PC/AGP Graphics
z
Set Top Box/IPC
z
Supply Splitter
SOP-8
VCNTL
VCNTL
GND
VIN
VOUT
REFEN
2
3
4
5
8
7
6
VCNTL
VCNTL
TO-252-5
1
2
3
4
5
VOUT
REFEN
VCNTL (TAB)
GND
VIN
Note :
RichTek Pb-free and 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.
`
100%matte tin (Sn) plating.
Package Type
S : SOP-8
L5 : TO-252-5
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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