RT9173/A
November, 2000
3A Bus Termination Regulator
General Description
The RT9173/A regulator is designed to convert
voltage supplies ranging from 1.8V to 6V into a
desired output voltage which adjusted by two
external resistors, voltage divider. The regulator
is capable of sourcing or sinking up to 3A of
current while regulating an output voltage to
within 2% or less.
The RT9173/A, 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.
Features
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Power TO-263-5 Package.
Capable of Sourcing and Sinking Current 3A
Current-limiting Protection
Thermal Protection
Integrated Power MOSFETs.
Generates Termination Voltages for SSTL-2
High Accuracy Output Voltage at Full-load
Adjustable VOUT by External Resistors
Minimum External Components
Shutdown for Standby or Suspend Mode
Operation with High-impedance Output
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Soft-start Function
Applications
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Computers
Disk Drives
CD-ROM
Supply Splitter
Ordering Information
RT9173/A
Package type
M5: TO-263-5
Operation temperature range
C: Commercial standard
3A sink & source
1A sink & source
Pin Configuration
Part Number
RT9173/ACM5
(Plastic TO-263-5)
Pin Configuration
Pin Name
1
VIN
MARK
2
GND
3 VCNTL
4 REFEN
12 3 4 5
5 VOUT
Absolute Maximum Ratings
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Input Voltage Range
Power Dissipation
ESD Rating
Storage Temperature Range
Lead Temperature (Soldering, 5 seconds)
Package Thermal Resistance
TO-263 (胃
JC
)
7V
Internally Limited
3KV
-50擄C to 150擄C
260擄C
2擄C/W
RichTek Technology Corp.
6F, No. 35, Hsintai Road, Chupei City, Hsinchu, Taiwan, R.O.C.
-- 1 / 5 --
DS9173/A-00
Tel: (8863) 5510047 Fax: (8863) 5537749
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