Datasheet
V
TT
LP2998
PV
IN
V
DDQ
V
REF
AV
IN
V
SENSE
GND
+
+
+
SD
SD
C
IN
C
OUT
C
REF
AV
IN
=
2.5V
V
DDQ
=
1.8V
V
TT
=
0.9V
V
REF
=
0.9V
LP2998/LP2998-Q1
www.ti.com
SNVS521J –DECEMBER 2007–REVISED DECEMBER 2013
LP2998/LP2998-Q1 DDR-I and DDR-II Termination Regulator
Check for Samples: LP2998/LP2998-Q1
1
FEATURES
DESCRIPTION
The LP2998 linear regulator is designed to meet
2
• AEC-Q100 Test Guidance with the following
JEDEC SSTL-2 and JEDEC SSTL-18 specifications
results (SO PowerPAD-8):
for termination of DDR1-SDRAM and DDR-II
– Device HBM ESD Classification Level H1C
memory. The device contains a high-speed
– Junction Temperature Range –40°C to
operational amplifier to provide excellent response to
load transients. The output stage prevents shoot
125°C
through while delivering 1.5A continuous current as
• Source and Sink Current
required for DDR1-SDRAM termination, and 0.5A
• Low Output Voltage Offset
continuous current as required for DDR-II termination.
• No External Resistors Required
The LP2998 also incorporates a V
SENSE
pin to provide
superior load regulation and a V
REF
output as a
• Linear Topology
reference for the chipset and DIMMs.
• Suspend to Ram (STR) Functionality
An additional feature found on the LP2998 is an
• Low External Component Count
active low shutdown (SD) pin that provides Suspend
• Thermal Shutdown
To RAM (STR) functionality. When SD is pulled low,
• Available in SOIC-8, SO PowerPAD-8 Packages
the V
TT
output will tri-state providing a high
impedance output, while V
REF
remains active. A
power savings advantage can be obtained in this
APPLICATIONS
mode through lower quiescent current.
• DDR-I, DDR-II and DDR-III Termination Voltage
• SSTL-18, SSTL-2, and SSTL-3 Termination
• HSTL Termination
• Automotive Infotainment
• Industrial/ Medical PC
Typical Application Circuit
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.