All contents are subject to change without prior notice
1
Description
The
CYT9174 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
CYT9174, 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.
Features
Support Both DDR 1 (1.25VTT) and DDR 2
(0.9VTT) Requirements
SOP-8 Packages
Capable of Sourcing and Sinking Current 2.0A
Current-limiting Protection
Thermal Protection
Current-shoot-through 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
Pin Configuration
Application
DDR Memory Termination
Active Termination Buses
Supply Splitter
Block Diagram
VIN
VOUT
CNTL
GND
Current
Limiting Sensor
Thermal
VCNTL
REFEN
Pin Description
Pin Name
Pin function
VIN
Power Input
GND
Ground
VCNTL
Gate Drive Voltage
REFEN
Reference Voltage input and
Chip Enable
VOUT
Output Voltage
CYT9174
U
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
