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PDF LP2997M Data sheet ( Hoja de datos )
| Número de pieza | LP2997M | |
| Descripción | DDR-II Termination Regulator | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LP2997M (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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June 2004
LP2997
DDR-II Termination Regulator
General Description
The LP2997 linear regulator is designed to meet the JEDEC
SSTL-18 specifications for termination of DDR-II memory.
The device contains a high-speed operational amplifier to
provide excellent response to load transients. The output
stage prevents shoot through while delivering 500mA con-
tinuous current and transient peaks up to 900mA in the
application as required for DDR-II SDRAM termination. The
LP2997 also incorporates a VSENSE pin to provide superior
load regulation and a VREF output as a reference for the
chipset and DIMMs.
An additional feature found on the LP2997 is an active low
shutdown (SD) pin that provides Suspend To RAM (STR)
functionality. When SD is pulled low the VTT output will
tri-state providing a high impedance output, but, VREF will
remain active. A power savings advantage can be obtained
in this mode through lower quiescent current.
Features
n Source and sink current
n Low output voltage offset
n No external resistors required
n Linear topology
n Suspend to Ram (STR) functionality
n Low external component count
n Thermal Shutdown
n Available in SO-8, PSOP-8 packages
Applications
n DDR-II Termination Voltage
n SSTL-18 Termination
Typical Application Circuit
20109418
© 2004 National Semiconductor Corporation DS201094
www.national.com
1 page  
Typical Performance Characteristics
Iq vs AVIN in SD
Iq vs AVIN
VIH and VIL
20109420
VREF vs VDDQ
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VTT vs VDDQ
20109422
20109424
Iq vs AVIN in SD Temperature
20109426
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5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
8-Lead Small Outline Package (M8)
NS Package Number M08A
8-Lead PSOP Package (PSOP-8)
NS Package Number MRA08A
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LP2997M.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LP2997 | DDR-II Termination Regulator | National Semiconductor |
| LP2997 | DDR-II Termination Regulator | National Semiconductor |
| LP2997 | LP2997 DDR-II Termination Regulator (Rev. F) |  Texas Instruments |
| LP2997M | DDR-II Termination Regulator | National Semiconductor |
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