CYT9174 Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – 2.0A Bus Termination Regulator

CYT9174
Description
Features
The CYT9174 regulator is designed to convert ¾ Support Both DDR 1 (1.25V_TT) and DDR 2
voltage supplies ranging from 1.6V to 6V into a
(0.9V_TT) Requirements
desired output voltage, which is adjusted by two ¾ SOP-8 Packages
external voltage divider resistors. The regulator is ¾ Capable of Sourcing and Sinking Current 2.0A
capable of sourcing or sinking up to 2.0A of current ¾ Current-limiting Protection
while regulating an output voltage to within 2% ¾ Thermal Protection
(DDR 1 or DDR 2) or less.
¾ Current-shoot-through protection
The CYT9174, used in conjunction with series ¾ Integrated Power MOSFETs
termination resistors, provides an excellent voltage ¾ Generates Termination Voltages for SSTL-2
source for active termination schemes of high ¾ High Accuracy Output Voltage at Full-Load
speed transmission lines as those seen in high ¾ Adjustable Vout by External Resistors
speed memory buses and distributed back-plane ¾ Minimum External Components
designs. The voltage output of the regulator can be ¾ Shutdown for Standby or Suspend Mode
used as a termination voltage for DDR SDRAM.
Operation with High-impedance Output
Current limits in both sourcing and sinking
mode, plus on-chip thermal shutdown make the
circuit tolerant of the output fault conditions.
Application
¾ DDR Memory Termination
¾ Active Termination Buses
Pin Configuration
¾ Supply Splitter
U
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
All contents are subject to change without prior notice
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