LP3872   
1.5A Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
•Ultra low dropout voltage
•Low ground pin current
•Load regulation of 0.06%
•10nA quiescent current in shutdown mode
•Guaranteed output current of 1.5A DC
•Available in TO-263, TO-220 and SOT-223 packages
•Output voltage accuracy ± 1.5%
•Error# flag indicates output status
•Sense option improves load regulation
•Minimum output capacitor requirements
•Overtemperature/overcurrent protection
•-40°C to +125°C junction temperature range

Description

The LP3872/LP3875 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 quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3872/LP3875 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3872/LP3875 to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 38mV at 150mA load current and 380mV at 1.5A load current.

Ground Pin Current: Typically 6mA at 1.5A load current.

Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.

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

SENSE: Sense pin improves regulation at remote loads.

Precision Output Voltage: Multiple output voltage options are available ranging from 1.8V to 5.0V 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
LP38852▲New! National's LP38k Family Of High
LP38855▲Performance LDOs Power Digital ICs
LP38858▲See More At LDO.NATIONAL.COM



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Also Recommended
LP38852▲New! National's LP38k Family Of High
LP38855▲Performance LDOs Power Digital ICs
LP38858▲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 / ValuesLP3872 LP38852 LP38855 LP38858
Output Current1500 mA 1500 mA 1500 mA 1500 mA
Output Min1.8, 2.5, 3.3, 5 Volt 0.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
Input Min Voltage2.5 Volt 1.38, 0.98 Volt 1.38, 0.98 Volt
Input Max Voltage7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
Dropout Voltage0.38 Volt 0.130 Volt 0.130 Volt 0.18 Volt
Adjustable OutputNo Yes No No
Quiescent Current6 mA 10 mA 10 mA 10 mA
On/Off PinYes Yes Yes No
Error FlagYes No No No
RegTypeLDO LDO LDO LDO
Temperature Min-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
Output Voltage1.8, 2.5, 3.3, 5 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
Output Max1.8, 2.5, 3.3, 5 Volt 1.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt

Datasheet
TitleSizeDateOther
Language
LP3872/LP3875 1.5A Fast Ultra Low Dropout Linear Regulators745
Kbytes		18-Sep-06日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1841: Application Note 1841 LMH1982 Evaluation Board User Guide913
Kbytes		21-May-08 中文


More Application Notes
TitleSizeDateOther
Language
AN-1409: Application Note 1409 LP3878-ADJ Evaluation Board430
Kbytes		14-Oct-05 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3872EMP-1.8/NOPB

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide616
RS COMPONENTSWorldwide999
$1.21 each at 1K+ pcsreel
of
1000
LP3872EMP-2.5/NOPB

RoHS

Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide1266
FARNELLEurope and Asia850
RS COMPONENTSWorldwide768
$1.21 each at 1K+ pcsreel
of
1000
LP3872EMP-3.3/NOPB

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide1000
DIGIKEYWorldwide2798
FARNELLEurope and Asia1033
NEWARKAmericas203
RS COMPONENTSWorldwide44
$1.21 each at 1K+ pcsreel
of
1000
LP3872EMP-5.0/NOPB
LP3872EMP-5.0

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide2031
RS COMPONENTSWorldwide944
$1.21 each at 1K+ pcsreel
of
1000
LP3872EMPX-2.5/NOPB

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FARNELLEurope and Asia1410
$1.21 each at 1K+ pcsreel
of
2000
LP3872EMPX-3.3/NOPB

RoHS

Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.21 each at 1K+ pcsreel
of
2000
LP3872ET-1.8/NOPB

RoHS



TO-220		Lifetime buy
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FARNELLEurope and Asia29
$1.45 each at 1K+ pcsrail
of
45
LP3872ET-2.5/NOPB

RoHS



TO-220		Lifetime buy
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsrail
of
45
LP3872ET-3.3/NOPB
LP3872ET-3.3

RoHS



TO-220		Lifetime buy
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide942
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsrail
of
45
LP3872ET-5.0/NOPB

RoHS



TO-220		Lifetime buy
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
RS COMPONENTSWorldwide32
$1.45 each at 1K+ pcsrail
of
45
LP3872ES-1.8/NOPB
LP3872ES-1.8

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
AVNET-EMWorldwide175
DIGIKEYWorldwide1322
FUTUREWorldwide360
RS COMPONENTSWorldwide6
$1.45 each at 1K+ pcsrail
of
45
LP3872ES-2.5/NOPB
LP3872ES-2.5

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide191
AVNET-EMWorldwide11650
DIGIKEYWorldwide227
FUTUREWorldwide315
KEIKONGAsia Pacific450
$1.45 each at 1K+ pcsrail
of
45
LP3872ES-3.3/NOPB
LP3872ES-3.3

RoHS



TO-263		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide73
DIGIKEYWorldwide280
FARNELLEurope and Asia165
FUTUREWorldwide805
KEIKONGAsia Pacific450
NEWARKAmericas101
RS COMPONENTSWorldwide27
$1.45 each at 1K+ pcsrail
of
45
LP3872ES-5.0/NOPB
LP3872ES-5.0

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide180
DIGIKEYWorldwide78
FUTUREWorldwide305
KEIKONGAsia Pacific385
$1.45 each at 1K+ pcsrail
of
45
LP3872ESX-1.8/NOPB
LP3872ESX-1.8

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide500
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3872ESX-2.5/NOPB

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3872ESX-3.3/NOPB

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3872ESX-5.0/NOPB

RoHS



TO-263		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3872ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3872EMP-1.8/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHAB
LP3872EMP-2.5/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHBB
LP3872EMP-3.3/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHCB
LP3872EMP-5.0/NOPB
LP3872EMP-5.0
SOT-22351
1		260
260		RoHSDownloadN/A
XYTT
LHDB
LP3872EMPX-2.5/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHBB
LP3872EMPX-3.3/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHCB
LP3872ET-1.8/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3872ET
-1.8
LP3872ET-2.5/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3872ET
-2.5
LP3872ET-3.3/NOPB
LP3872ET-3.3
TO-22051
1		NA
NA		RoHSDownloadN/A
NSUZXYTTE#
LP3872ET
-3.3
LP3872ET-5.0/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3872ET
-5.0
LP3872ES-1.8/NOPB
LP3872ES-1.8
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-1.8
LP3872ES-2.5/NOPB
LP3872ES-2.5
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-2.5
LP3872ES-3.3/NOPB
LP3872ES-3.3
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-3.3
LP3872ES-5.0/NOPB
LP3872ES-5.0
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-5.0
LP3872ESX-1.8/NOPB
LP3872ESX-1.8
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-1.8
LP3872ESX-2.5/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-2.5
LP3872ESX-3.3/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-3.3
LP3872ESX-5.0/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3872ES
-5.0

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3872EMP-1.8CS065238968520440200011249079519
LP3872EMP-2.5CS065238968520440200011249079519
LP3872EMP-3.3CS065238968520440200011249079519
LP3872EMP-5.0CS065238968520440200011249079519
LP3872EMPX-2.5CS065238968520440200011249079519
LP3872EMPX-3.3CS065238968520440200011249079519
LP3872ES-1.8CS065238968520440200011249079519
LP3872ES-2.5CS065238968520440200011249079519
LP3872ES-3.3CS065238968520440200011249079519
LP3872ES-5.0CS065238968520440200011249079519
LP3872ESX-1.8CS065238968520440200011249079519
LP3872ESX-2.5CS065238968520440200011249079519
LP3872ESX-3.3CS065238968520440200011249079519
LP3872ESX-5.0CS065238968520440200011249079519
LP3872ET-1.8CS065238968520440200011249079519
LP3872ET-2.5CS065238968520440200011249079519
LP3872ET-3.3CS065238968520440200011249079519
LP3872ET-5.0CS065238968520440200011249079519

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
LP3872ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3872ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 22-Nov-2009]