LP3875   
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
LP3875-ADJ▲Adjustable Output Verion
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
LP3875-ADJ▲Adjustable Output Verion
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 / ValuesLP3875 LP3875-ADJ LP38852 LP38855 LP38858
Output Current1500 mA 1500 mA 1500 mA 1500 mA 1500 mA
Output Min1.8, 2.5, 3.3, 5 Volt 1.216 Volt 0.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
Input Min Voltage2.5 Volt 2.5 Volt 1.38, 0.98 Volt 1.38, 0.98 Volt
Input Max Voltage7 Volt 7 Volt 5.5 Volt 5.5 Volt 5.5 Volt
Dropout Voltage0.38 Volt 0.38 Volt 0.130 Volt 0.130 Volt 0.18 Volt
Adjustable OutputNo Yes Yes No No
Quiescent Current6 mA 6 mA 10 mA 10 mA 10 mA
On/Off PinYes Yes Yes Yes No
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, 5 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt
Output Max1.8, 2.5, 3.3, 5 Volt 6.62 Volt 1.8 Volt 1.2, 0.8 Volt 1.2, 0.8 Volt

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


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
LP3875EMP-1.8/NOPB
LP3875EMP-1.8

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide1000
AVNET-EMWorldwide1000
DIGIKEYWorldwide2387
NEWARKAmericas578
RS COMPONENTSWorldwide12
$1.30 each at 1K+ pcsreel
of
1000
LP3875EMP-2.5/NOPB
LP3875EMP-2.5

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide2968
RS COMPONENTSWorldwide51
$1.30 each at 1K+ pcsreel
of
1000
LP3875EMP-3.3/NOPB
LP3875EMP-3.3

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide1000
AVNET-EMWorldwide890
DIGIKEYWorldwide956
FARNELLEurope and Asia183
FUTUREWorldwide1100
NEWARKAmericas260
$1.30 each at 1K+ pcsreel
of
1000
LP3875EMP-5.0/NOPB
LP3875EMP-5.0

RoHS Status



SOT-223		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1847
RS COMPONENTSWorldwide900
$1.30 each at 1K+ pcsreel
of
1000
LP3875ES-1.8/NOPB
LP3875ES-1.8

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide495
DIGIKEYWorldwide285
NEWARKAmericas199
$1.45 each at 1K+ pcsrail
of
45
LP3875ES-2.5/NOPB
LP3875ES-2.5

RoHS Status



TO-263		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide180
AVNET-EMWorldwide30
DIGIKEYWorldwide22
NEWARKAmericas65
$1.45 each at 1K+ pcsrail
of
45
LP3875ES-3.3/NOPB
LP3875ES-3.3

RoHS Status



TO-263		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide190
DIGIKEYWorldwide1002
NEWARKAmericas292
$1.45 each at 1K+ pcsrail
of
45
LP3875ESX-1.8/NOPB
LP3875ESX-1.8

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3875ESX-2.5/NOPB
LP3875ESX-2.5

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3875ESX-3.3/NOPB
LP3875ESX-3.3

RoHS Status



TO-263		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.45 each at 1K+ pcsreel
of
500
LP3875ET-3.3/NOPB
LP3875ET-3.3

RoHS Status



TO-220		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide225
DIGIKEYWorldwide336
FARNELLEurope and Asia23
FUTUREWorldwide225
RS COMPONENTSWorldwide36
$1.45 each at 1K+ pcsrail
of
45

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3875EMPX-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875EMPX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ES-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-ADJ
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
LP3875EMP-1.8/NOPB
LP3875EMP-1.8
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LHLB
LP3875EMP-2.5/NOPB
LP3875EMP-2.5
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LHNB
LP3875EMP-3.3/NOPB
LP3875EMP-3.3
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LHPB
LP3875EMP-5.0/NOPB
LP3875EMP-5.0
SOT-22351
1		260
260		DetailDownloadN/A
XYTT
LHRB
LP3875ES-1.8/NOPB
LP3875ES-1.8
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-1.8
LP3875ES-2.5/NOPB
LP3875ES-2.5
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-2.5
LP3875ES-3.3/NOPB
LP3875ES-3.3
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-3.3
LP3875ESX-1.8/NOPB
LP3875ESX-1.8
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-1.8
LP3875ESX-2.5/NOPB
LP3875ESX-2.5
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-2.5
LP3875ESX-3.3/NOPB
LP3875ESX-3.3
TO-26353
3		245
235		DetailDownloadN/A
NSUZXYTTE#
LP3875ES
-3.3
LP3875ET-3.3/NOPB
LP3875ET-3.3
TO-22051
1		NA
NA		DetailDownloadN/A
NSUZXYTTE#
LP3875ET
-3.3

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 LP3875 CAD Symbols
 Models
N/A

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3875EMP-1.8CS065238968520440200011249079519
LP3875EMP-2.5CS065238968520440200011249079519
LP3875EMP-3.3CS065238968520440200011249079519
LP3875EMP-5.0CS065238968520440200011249079519
LP3875EMPX-2.5CS065238968520440200011249079519
LP3875EMPX-5.0CS065238968520440200011249079519
LP3875ES-1.8CS065238968520440200011249079519
LP3875ES-2.5CS065238968520440200011249079519
LP3875ES-3.3CS065238968520440200011249079519
LP3875ES-5.0CS065238968520440200011249079519
LP3875ESX-1.8CS065238968520440200011249079519
LP3875ESX-2.5CS065238968520440200011249079519
LP3875ESX-3.3CS065238968520440200011249079519
LP3875ET-1.8CS065238968520440200011249079519
LP3875ET-2.5CS065238968520440200011249079519
LP3875ET-3.3CS065238968520440200011249079519
LP3875ET-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.


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
LP3875EMPX-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875EMPX-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ES-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-5.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3875ET-ADJ
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 21-Mar-2010]