DDR Termination Regulator
FEATURES
Source and sink current
Low output voltage offset
No external resistors required
Linear topology
Suspend to Ram (STR) functionality
Low external component count
Thermal Shutdown
Available in
SOP8, SOP8-PP Packages
SOP8 / SOP8-PP PKG
TJ2997
APPLICATION
DDR -II and -III Termination Voltage
SSTL Termination
HSTL Termination
ORDERING INFORMATION
Device
TJ2997GD
TJ2997GDP
Package
SOP8
SOP8-PP
DESCRIPSION
The TJ2997 linear regulator is designed to meet the JEDEC SSTL specifications for termination of DDR-
SDRAM. The device contains a high-speed operational amplifier to provide excellent response to load
transients. The output stage prevents shoot through while delivering up to 1.5A continuous current and
transient peaks up to 3A with respect to PVIN operating condition in the application as required for DDR-
SDRAM termination. The TJ2997 also incorporates a V
SENSE
pin to provide superior load regulation and a
V
REF
output as a reference for the chipset and DIMMs. An additional feature found on the TJ2997 is an
active high enable (EN) pin that provides Suspend To RAM (STR) functionality. When EN is pulled low the
V
TT
output will tri-state providing a high impedance output, but, V
REF
will remain active. A power savings
advantage can be obtained in this mode through lower quiescent current.
Absolute Maximum Ratings
CHARACTERISTIC
Supply Voltage to GND
Lead Temperature (Soldering, 10 sec)
Storage Temperature Range
Operating Junction Temperature Range
SYMBOL
PV
IN
AV
IN
V
DDQ
T
SOL
T
STG
T
JOPR
MIN.
-0.3
-0.3
-0.3
MAX.
6.0
6.0
6.0
260
UNIT
V
℃
℃
℃
-65
-40
150
125
Recommended Operation Range
CHARACTERISTIC
AV
IN
to GND
PV
IN
& EN to GND
SYMBOL
AV
IN
PV
IN
& EN
MIN.
2.3
0
MAX.
5.5
AV
IN
UNIT
V
V
Ordering Information
Package
SOP8
SOP8-PP
Apr, 2011 - R1.0.1
Order No.
TJ2997GD
TJ2997GDP
Description
DDR Termination Regulator
DDR Termination Regulator
1/13
Package Marking
TJ2997G
TJ2997G
Supplied As
Reel
Reel
HTC
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
