Datenblatt-pdf.com


LP2997 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer LP2997
Beschreibung DDR-II Termination Regulator
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 12 Seiten
LP2997 Datasheet, Funktion
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






LP2997 Datasheet, Funktion
Typical Performance Characteristics (Continued)
Iq vs AVIN Temperature
Maximum Sourcing Current vs AVIN
(VDDQ = 1.8V, PVIN = 1.8V)
20109428
Maximum Sinking Current vs AVIN
(VDDQ = 1.8V)
20109435
20109436
www.national.com
6

6 Page









LP2997 pdf, datenblatt
Notes
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
BANNED SUBSTANCE COMPLIANCE
National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products
Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification
(CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2.
National Semiconductor
Americas Customer
Support Center
Email: new.feedback@nsc.com
Tel: 1-800-272-9959
www.national.com
National Semiconductor
Europe Customer Support Center
Fax: +49 (0) 180-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
National Semiconductor
Asia Pacific Customer
Support Center
Email: ap.support@nsc.com
National Semiconductor
Japan Customer Support Center
Fax: 81-3-5639-7507
Email: jpn.feedback@nsc.com
Tel: 81-3-5639-7560
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

12 Page





SeitenGesamt 12 Seiten
PDF Download[ LP2997 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
LP2992Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output CapacitorsNational Semiconductor
National Semiconductor
LP2992Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output CapacitorsNational Semiconductor
National Semiconductor
LP2992Micropower 250-mA Low-Noise Ultralow-Dropout Regulator (Rev. I)Texas Instruments
Texas Instruments
LP2992AILD-1.5Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output CapacitorsNational Semiconductor
National Semiconductor
LP2992AILD-1.5Micropower 250 mA Low-Noise Ultra Low-Dropout Regulator in SOT-23 and LLP Packages Designed for Use with Very Low ESR Output CapacitorsNational Semiconductor
National Semiconductor

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche