CYT9174 Termination Regulator Datasheet

CYT9174 Datasheet, PDF, Equivalent


Part Number

CYT9174

Description

2.0A Bus Termination Regulator

Manufacture

CYT

Total Page 5 Pages
Datasheet
Download CYT9174 Datasheet


CYT9174
CYT9174
Description
Features
The CYT9174 regulator is designed to convert ¾ Support Both DDR 1 (1.25VTT) and DDR 2
voltage supplies ranging from 1.6V to 6V into a
(0.9VTT) 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.
www.DataSheet4U.com
Application
¾ DDR Memory Termination
¾ Active Termination Buses
Pin Configuration
¾ Supply Splitter
U
Block Diagram
Pin Description
Pin Name
Pin function
VIN
GND
Power Input
Ground
VCNTL
REFEN
Gate Drive Voltage
Reference Voltage input and
Chip Enable
VOUT
Output Voltage
VCNTL
VIN
REFEN
Current
Limiting Sensor
Thermal
CNTL
VOUT
GND
All contents are subject to change without prior notice
1

CYT9174
CYT9174
Absolute Maximum Rating (1)
Parameter
Symbol
Input Voltage
Power Dissipation
ESD Rating
VIN
PD
--
Storage Temperature
Range
TS
Lead Temperature
(Soldering, 5 sec.)
TLEAD
Package Thermal
Resistance
ΘJC
Value
6
Internally Limited
3
-65 to 150
260
15.7
Unit
V
--
KV
°C
°C
ºC/W
Electrical Characteristics
VIN=2.5V, VCNTL=3.3V, VREFEN=1.25V, COUT=10µF (Ceramic)), TA=25ºC, unless otherwise specified
Parameter
Output Offset Voltage (2)
Load Regulation
(DDR 1/2)
Input Voltage Range
(DDR 1/2)
Symbol
VOS
|VLOAD|
VIN
VCNTL
Test Conditions
IOUT = 0A
IL : 0A2.0A
IL : 0A-2.0A
Keep VCNTLVIN on
operation power on and
power off sequences
Min Typ
-20 -5
-- 0.5
-- 0.5
1.6 2.5/1.8
-- 3.3
Current In Shutdown
Mode
ISHDN
VREFEN 0.2V, RL = 180
--
1
Short Circuit Protection
Current limit
Quiescent Current
ILIMIT
IQ IL=2.0A
Over Temperature Protection
--
--
2.5
1.4
Thermal Shutdown
Temperature
TCASE
3.3V VCNTL 5 V
-- 100
Thermal Shutdown
Hysterresis
Guaranteed by design
--
30
Shutdown Function
Shutdown Threshold
Output=High
0.8 --
Trigger
Output=Low
-- --
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: VOS offset is the voltage measurement defined as VOUT subtracted from VREFEN
Max
20
2
2
--
6
90
--
3
--
--
--
0.2
Units
mV
%
V
µA
A
mA
ºC
V
All contents are subject to change without prior notice
2


Features CYT9174 Description voltage supplies ran ging from 1.6V to 6V into a desired out put voltage, which is adjusted by two e xternal voltage divider resistors. The regulator is capable of sourcing or sin king up to 2.0A of current while regula ting an output voltage to within 2% (DD R 1 or DDR 2) or less. termination resi stors, provides an excellent voltage so urce for active termination schemes of high speed transmission lines as those seen in high speed memory buses and dis tributed back-plane designs. The voltag e output of the regulator can be used a s a termination voltage for DDR SDRAM. Current limits in both sourcing and sin king mode, plus on-chip thermal shutdow n make the circuit tolerant of the outp ut fault conditions. www.DataSheet4U.co m Features Support Both DDR 1 (1.25VTT ) and DDR 2 (0.9VTT) Requirements ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ SOP-8 Packages Capable of Sourcing and Sinking Curren t 2.0A Current-limiting Protection Ther mal Protection Current-shoot-through protection Integrated Power MOSFETs .
Keywords CYT9174, datasheet, pdf, CYT, 2.0A, Bus, Termination, Regulator, YT9174, T9174, 9174, CYT917, CYT91, CYT9, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)