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LP2994 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LP2994
Description  DDR Termination Regulator
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP2994 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LP2994
DDR Termination Regulator
General Description
The LP2994 regulator is designed to provide a linear solution
to meet the JEDEC SSTL-2 and SSTL-3 specifications (Se-
ries Stub Termination Logic) for active termination of DDR-
SDRAM. The device utilizes an internal operational amplifier
to provide linear regulation of V
TT without the need for
expensive external components. The output stage prevents
shoot through while delivering 1.5A continuous current and
maintaining excellent load regulation. The LP2994 also in-
corporates an active low shutdown pin to tri-state the output
during Suspend To Ram (STR) states.
Patents Pending
Features
n
Source and sink current
n
Low external component count
n
Independent analog and power rails
n
Linear topology
n
Small package SO-8
n
Low cost and easy to use
n
Shutdown pin
Applications
n
SSTL-2
n
SSTL-3
n
DDR-SDRAM Termination
n
DDR-II Termination
Typical Application Circuit
20045904
FIGURE 1. SSTL-2 V
TT Termination
May 2002
© 2002 National Semiconductor Corporation
DS200459
www.national.com


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