LP2995   
DDR Termination Regulator 		Click link to Download

Features
•Low output voltage offset
•Works with +5v, +3.3v and 2.5v rails
•Source and sink current
•Low external component count
•No external resistors required
•Linear topology
•Available in SO-8, PSOP-8 or LLP-16 packages
•Low cost and easy to use

Description

The LP2995 linear regulator is designed to meet the JEDEC SSTL-2 and SSTL-3 specifications for termination of DDR-SDRAM. The device contains a high-speed operational amplifier to provide excellent response to load transients. The output stage prevents shoot through while delivering 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM termination. The LP2995 also incorporates a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DDR DIMMS.

Patents Pending

Applications
•DDR Termination Voltage
•SSTL-2
•SSTL-3
Also Recommended
LM2744▲Switching Termination Regulator
LP2996▲Has Sd, Split Rails, And Thermal Protection
LP2994▲Has Shutdown Capability



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Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLP2995 LM2744 LP2996 LP2994
Input Min Voltage2.2 Volt 1 Volt 1.5 Volt
Input Max Voltage5 Volt 16 Volt 5.5 Volt
Output Current1500 mA 20000 mA 1500 mA
StandardsDDR DDR, DDR-II DDR, DDR-II
External Components3 4 3
Independent Power/Analog RailsNo Yes No
On/Off PinNo Yes Yes
Reference Output1.25 Volt 1.25 Volt
Thermal ProtectionNo No Yes
Error FlagNo Yes No
Quiescent Current0.25 mA 1.5 mA 0.32 mA
RegTypeLDO Switching Controller LDO
Temperature Min0 deg C -40 deg C 0 deg C
Temperature Max125 deg C 125 deg C 125 deg C

Datasheet
TitleSizeDateOther
Language
LP2995 DDR Termination Regulator679
Kbytes		16-Jun-06日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1241: Application Note 1241 LP2995 Evaluation Board373
Kbytes		25-Sep-02 
AN-1254: Application Note 1254 DDR-SDRAM Termination Simplified Using a Linear Regulator49
Kbytes		1-Oct-02 


More Application Notes
TitleSizeDateOther
Language
AN-1268: Application Note 1268 LP2996 Evaluation Board67
Kbytes		5-Dec-02 
AN-1813: Application Note 1813 LP2998 Evaluation Board975
Kbytes		10-Mar-08 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP2995LQ/NOPB
LP2995LQ

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1874
FARNELLEurope and Asia20
FUTUREWorldwide1100
$0.56 each at 1K+ pcsreel
of
1000
LP2995LQX/NOPB

RoHS

Lifetime buy
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.56 each at 1K+ pcsreel
of
4500
LP2995M/NOPB
LP2995M

RoHS



SOIC NARROW		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide660
AVNET-EMWorldwide18
DIGIKEYWorldwide1056
FARNELLEurope and Asia757
FUTUREWorldwide1100
KEIKONGAsia Pacific6665
NEWARKAmericas566
RS COMPONENTSWorldwide1
$0.56 each at 1K+ pcsrail
of
95
LP2995MX/NOPB
LP2995MX

RoHS



SOIC NARROW		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
AITGAsia Pacific1001
DIGIKEYWorldwide0
FUTUREWorldwide1100
NEWARKAmericas1673
TECHMOSAAsia Pacific22000
$0.56 each at 1K+ pcsreel
of
2500
LP2995MR/NOPB
LP2995MR

RoHS



PSOP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide272
AVNET-EMWorldwide550
DIGIKEYWorldwide0
FARNELLEurope and Asia440
FUTUREWorldwide131
NEWARKAmericas454
RS COMPONENTSWorldwide85
$0.56 each at 1K+ pcsrail
of
95
LP2995MRX/NOPB
LP2995MRX

RoHS



PSOP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
AITGAsia Pacific1001
AVNET-EMWorldwide5000
DIGIKEYWorldwide0
FUTUREWorldwide1100
TECHMOSAAsia Pacific9166
$0.56 each at 1K+ pcsreel
of
2500

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP2995LQX
LP2995MR
NATIONAL SEMICONDUCTOR
01 Dec 2009

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP2995LQEVAL
DDR Termination RegulatorFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
NATIONALWorldwide51
$10.50 each1

LP2995 DDR Termination Regulator

Features:

  • Low output voltage offset
  • Works with +5V, +3.3V and 2.5V rails
  • Source and sink current
  • Low external component count
  • No external resistors required
  • Linear topology
  • Small package (SO-8 or LLP-16)
  • Low cost and easy to use

Applications:

  • DDR Termination Voltage
  • SSTL-2
  • SSTL-3

Contents:

  • A fully assembled LP2995LQ evaluation board
  • LP2995 evaluation board appnote
  • LP2995 datasheet

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP2995M-EVAL
DDR Termination RegulatorFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide2
NATIONALWorldwide48
$10.50 each1

LP2995 DDR Termination Regulator

Features:

  • Low output voltage offset
  • Works with +5V, +3.3V and 2.5V rails
  • Source and sink current
  • Low external component count
  • No external resistors required
  • Linear topology
  • Small package (SO-8 or LLP-16)
  • Low cost and easy to use

Applications:

  • DDR Termination Voltage
  • SSTL-2
  • SSTL-3

Contents:

  • A fully assembled LP2995M evaluation board
  • LP2995 evaluation board appnote
  • LP2995 datasheet

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP2995LQ/NOPB
LP2995LQ
LLP163
1		260
235		RoHSDownloadN/A
NS
UZXYTT
L00005B
LP2995LQX/NOPB
LLP163260RoHSDownloadN/A
NS
UZXYTT
L00005B
LP2995M/NOPB
LP2995M
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2995M
LP2995MX/NOPB
LP2995MX
SOIC NARROW81
1		260
235		RoHSDownloadN/A
NSZXTT
2995M
LP2995MR/NOPB
LP2995MR
PSOP83
3		260
260		RoHSDownloadN/A
NSXYTT
LP2995
LP2995MRX/NOPB
LP2995MRX
PSOP83
3		260
260		RoHSDownloadN/A
NSXYTT
LP2995

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP2995LQCS065238968520440200011249079519
LP2995LQXCS065238968520440200011249079519
LP2995MCS065238968520440200011249079519
LP2995MRCS065238968520440200011249079519
LP2995MRXCS065238968520440200011249079519
LP2995MXCS065238968520440200011249079519

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP2995LQX
LP2995MR
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 22-Nov-2009]