SE9174 Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – 2.0A Bus Termmination Regulator

Description
The SE9174 regulator is designed to convert
voltage supplies ranging from 1.6V to 6V into a
desired output voltage, which is adjusted by two
external voltage divider resistors. The regulator is
capable of sourcing or sinking up to 2.0A of current
while regulating an output voltage to within 2%
(DDR 1 or DDR 2) or less.
The SE9174, 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 back-plane
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.
Pin Configuration
Features
¾ Support Both DDR 1 (1.25V_TT) and DDR 2
(0.9V_TT) Requirements
¾ SOP-8 Packages
¾ Capable of Sourcing and Sinking Current 2.0A
¾ Current-limiting Protection
¾ Thermal Protection
¾ Current-shoot-through protection
¾ Integrated Power MOSFETs
¾ Generates Termination Voltages for SSTL-2
¾ High Accuracy Output Voltage at Full-Load
¾ Adjustable Vout by External Resistors
¾ Minimum External Components
¾ Shutdown for Standby or Suspend Mode
Operation with High-impedance Output
Application
¾ DDR Memory Termination
¾ Active Termination Buses
¾ Supply Splitter
Block Diagram
Pin Description
Pin Name
Pin function
V_IN
Power Input
GND
Ground
V_CNTL
REFEN
Gate Drive Voltage
Reference Voltage input and
Chip Enable
V_OUT
Output Voltage
VCNTL
VIN
REFEN
Current
Limiting Sensor
Thermal
CNTL
VOUT
GND
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