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LP2998, LP2998-Q1
SNVS521K –DECEMBER 2007–REVISED AUGUST 2014
LP2998/LP2998-Q1 DDR Termination Regulator
1 Features
3 Description
The LP2998 linear regulator is designed to meet
1
•
AEC-Q100 Test Guidance with the following
results (SO PowerPAD-8):
JEDEC SSTL-2 and JEDEC SSTL-18 specifications
for termination of DDR-SDRAM and DDR2 memory.
The device also supports DDR3 and DDR3L VTT bus
termination with VDDQ min of 1.35 V. The device
contains a high-speed operational amplifier to provide
excellent response to load transients. The output
stage prevents shoot through while delivering 1.5 A
continuous current and transient peaks up to 3 A in
the application as required for DDR-SDRAM
–
–
Device HBM ESD Classification Level H1C
Junction Temperature Range –40°C to 125°C
•
•
•
•
•
•
•
•
1.35 V Minimum VDDQ
Source and Sink Current
Low Output Voltage Offset
No External Resistors Required
Linear Topology
termination. The LP2998 also incorporates
a
VSENSE pin to provide superior load regulation and
a VREF output as a reference for the chipset and
DIMMs.
Suspend to Ram (STR) Functionality
Low External Component Count
Thermal Shutdown
An additional feature found on the LP2998 is an
active low shutdown (SD) pin that provides Suspend
To RAM (STR) functionality. When SD is pulled low
2 Applications
the VTT output will tri-state providing
a
high
•
DDR1, DDR2, DDR3, and DDR3L Termination
Voltage
impedance output, but, VREF will remain active. A
power savings advantage can be obtained in this
mode through lower quiescent current.
•
•
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Automotive Infotainment
FPGA
Device Information(1)
Industrial/Medical PC
SSTL-18, SSTL-2, and SSTL-3 Termination
HSTL Termination
PART NUMBER
LP2998
PACKAGE
SO PowerPAD™ (8) 4.89 mm x 3.90 mm
SOIC (8) 4.90 mm x 3.91 mm
SO PowerPAD™ (8) 4.89 mm x 3.90 mm
BODY SIZE (NOM)
LP2998
LP2998-Q1
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
LP2998
V
= 0.75V
REF
V
REF
SD
V
SD
+
+
C
REF
V
= 1.5V
= 2.5V
DDQ
DDQ
V
DD
AV
IN
PV
IN
V
SENSE
V
TT
= 0.75V
V
TT
+
GND
C
C
OUT
IN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.