LP3964   
800mA Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
•Ultra low dropout voltage
•Low ground pin current
•Load regulation of 0.02%
•15µA quiescent current in shutdown mode
•Guaranteed output current of 0.8A DC
•Available in SOT-223,TO-263 and TO-220 packages
•Output voltage accuracy ± 1.5%
•Error# flag indicates output status (LP3961)
•Sense option improves better load regulation (LP3964)
•Extremely low output capacitor requirements
•Overtemperature/overcurrent protection
•-40°C to +125°C junction temperature range

Description

The LP3961/LP3964 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very fast to step changes in load which makes them suitable for low voltage microprocessor applications. The LP3961/LP3964 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3961/LP3964 to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 800mA load current.

Ground Pin Current: Typically 4mA at 800mA load current.

Shutdown Mode: Typically 15µA quiescent current when the shutdown pin is pulled low.

Error# Flag: Error# flag goes low when the output voltage drops 10% below nominal value (for LP3961).

SENSE: Sense pin improves regulation at remote loads. (For LP3964)

Precision Output Voltage: Multiple output voltage options are available ranging from 1.2V to 5.0V and adjustable (LP3964), with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).

Applications
•Microprocessor power supplies
•GTL, GTL+, BTL, and SSTL bus terminators
•Power supplies for DSPs
•SCSI terminator
•Post regulators
•High efficiency linear regulators
•Battery chargers
•Other battery powered applications
Also Recommended
LP3874▲Improved Shutdown Pin Thresholds
LP38851▲New! National's LP38k Family Of High
LP38852▲Performance LDOs Power Digital ICs
LP38853▲See More At LDO.NATIONAL.COM



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                                              LP3964
Drag-Select for Table Reset Graph
Also Recommended
LP3874▲Improved Shutdown Pin Thresholds
LP38851▲New! National's LP38k Family Of High
LP38852▲Performance LDOs Power Digital ICs
LP38853▲See More At LDO.NATIONAL.COM

Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLP3964 LP3874 LP38851 LP38852 LP38853
Output Current800 mA 800 mA 800 mA 1500 mA 3000 mA
Output Min1.8, 2.5, 3.3, 1.215 Volt 1.8, 2.5, 3.3, 5 Volt 0.80 Volt 0.8 Volt 0.8 Volt
Input Min Voltage2.5 Volt 2.5 Volt
Input Max Voltage7 Volt 7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
Dropout Voltage0.24 Volt 0.24 Volt 0.115 Volt 0.130 Volt 0.240 Volt
Adjustable OutputNo, Yes No Yes Yes Yes
Quiescent Current3 mA 5 mA 10 mA 10 mA 10 mA
On/Off PinYes Yes Yes Yes Yes
Error FlagNo No No No No
RegTypeLDO LDO LDO LDO LDO
Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C 125 deg C 125 deg C
Output Voltage1.8, 2.5, 3.3 Volt 1.8, 2.5, 3.3, 5 Volt
Output Max1.8, 2.5, 3.3, 5 Volt 1.8, 2.5, 3.3, 5 Volt 1.80 Volt 1.8 Volt 1.8 Volt

Datasheets
TitleSizeDateOther
Language
LP3961/LP3964 800mA Fast Ultra Low Dropout Linear Regulators914
Kbytes		20-Sep-06日本語

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3964EMP-1.8/NOPB
LP3964EMP-1.8

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide1714
FARNELLEurope and Asia1048
FUTUREWorldwide1100
NEWARKAmericas335
$1.07 each at 1K+ pcsreel
of
1000
LP3964EMP-2.5/NOPB
LP3964EMP-2.5

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide2000
FARNELLEurope and Asia572
FUTUREWorldwide1100
NEWARKAmericas1037
RS COMPONENTSWorldwide669
$1.07 each at 1K+ pcsreel
of
1000
LP3964EMP-3.3/NOPB
LP3964EMP-3.3

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1658
FARNELLEurope and Asia313
RS COMPONENTSWorldwide2215
$1.07 each at 1K+ pcsreel
of
1000
LP3964EMP-ADJ/NOPB
LP3964EMP-ADJ

RoHS Status



SOT-223		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
ARROWWorldwide11033
DIGIKEYWorldwide2859
FUTUREWorldwide1100
NEWARKAmericas461
RS COMPONENTSWorldwide1445
$1.07 each at 1K+ pcsreel
of
1000
LP3964EMPX-2.5/NOPB
LP3964EMPX-2.5

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide2000
DIGIKEYWorldwide0
$1.07 each at 1K+ pcsreel
of
2000
LP3964EMPX-ADJ/NOPB
LP3964EMPX-ADJ

RoHS Status



SOT-223		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.07 each at 1K+ pcsreel
of
2000
LP3964ES-1.8/NOPB
LP3964ES-1.8

RoHS Status



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide270
DIGIKEYWorldwide305
FARNELLEurope and Asia317
$1.22 each at 1K+ pcsrail
of
45
LP3964ES-2.5/NOPB
LP3964ES-2.5

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide489
AVNET-EMWorldwide85
DIGIKEYWorldwide598
NEWARKAmericas200
$1.22 each at 1K+ pcsrail
of
45
LP3964ES-3.3/NOPB
LP3964ES-3.3

RoHS Status



TO-263		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide270
DIGIKEYWorldwide559
FARNELLEurope and Asia641
$1.22 each at 1K+ pcsrail
of
45
LP3964ES-ADJ/NOPB
LP3964ES-ADJ

RoHS Status



TO-263		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide1171
AVNET-EMWorldwide124
DIGIKEYWorldwide395
FARNELLEurope and Asia929
FUTUREWorldwide60
RS COMPONENTSWorldwide10
$1.22 each at 1K+ pcsrail
of
45
LP3964ESX-2.5/NOPB
LP3964ESX-2.5

RoHS Status



TO-263		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AECO TECHAsia Pacific1000
DIGIKEYWorldwide0
$1.22 each at 1K+ pcsreel
of
500
LP3964ESX-3.3/NOPB
LP3964ESX-3.3

RoHS Status



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.22 each at 1K+ pcsreel
of
500
LP3964ESX-ADJ/NOPB
LP3964ESX-ADJ

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.22 each at 1K+ pcsreel
of
500
LP3964ET-ADJ/NOPB
LP3964ET-ADJ

RoHS Status



TO-220		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide40
RS COMPONENTSWorldwide89
$1.22 each at 1K+ pcsrail
of
45

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3964EMP-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ES-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LP3964EMP-1.8/NOPB
LP3964EMP-1.8
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBFB
LP3964EMP-2.5/NOPB
LP3964EMP-2.5
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBHB
LP3964EMP-3.3/NOPB
LP3964EMP-3.3
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBJB
LP3964EMP-ADJ/NOPB
LP3964EMP-ADJ
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBPB
LP3964EMPX-2.5/NOPB
LP3964EMPX-2.5
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBHB
LP3964EMPX-ADJ/NOPB
LP3964EMPX-ADJ
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LBPB
LP3964ES-1.8/NOPB
LP3964ES-1.8
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-1.8
LP3964ES-2.5/NOPB
LP3964ES-2.5
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-2.5
LP3964ES-3.3/NOPB
LP3964ES-3.3
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-3.3
LP3964ES-ADJ/NOPB
LP3964ES-ADJ
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-ADJ
LP3964ESX-2.5/NOPB
LP3964ESX-2.5
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-2.5
LP3964ESX-3.3/NOPB
LP3964ESX-3.3
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-3.3
LP3964ESX-ADJ/NOPB
LP3964ESX-ADJ
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3964ES
-ADJ
LP3964ET-ADJ/NOPB
LP3964ET-ADJ
TO-22051
1		NA
NA		DetailDownloadN/A
NSUZXYTTE#
LP3964ET
-ADJ

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models
Download LP3964 CAD Symbols
 Models
N/A

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3964EMP-1.8CS065238968520440200011249079519
LP3964EMP-2.5CS065238968520440200011249079519
LP3964EMP-3.3CS065238968520440200011249079519
LP3964EMP-5.0CS065238968520440200011249079519
LP3964EMP-ADJCS065238968520440200011249079519
LP3964EMPX-1.8CS065238968520440200011249079519
LP3964EMPX-2.5CS065238968520440200011249079519
LP3964EMPX-3.3CS065238968520440200011249079519
LP3964EMPX-5.0CS065238968520440200011249079519
LP3964EMPX-ADJCS065238968520440200011249079519
LP3964ES-1.8CS065238968520440200011249079519
LP3964ES-2.5CS065238968520440200011249079519
LP3964ES-3.3CS065238968520440200011249079519
LP3964ES-5.0CS065238968520440200011249079519
LP3964ES-ADJCS065238968520440200011249079519
LP3964ESX-1.8CS065238968520440200011249079519
LP3964ESX-2.5CS065238968520440200011249079519
LP3964ESX-3.3CS065238968520440200011249079519
LP3964ESX-5.0CS065238968520440200011249079519
LP3964ESX-ADJCS065238968520440200011249079519
LP3964ET-1.8CS065238968520440200011249079519
LP3964ET-2.5CS065238968520440200011249079519
LP3964ET-3.3CS065238968520440200011249079519
LP3964ET-5.0CS065238968520440200011249079519
LP3964ET-ADJCS065238968520440200011249079519

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.


All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3964EMP-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964EMPX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ES-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ESX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-2.7
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3964ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 22-Mar-2010]