LP3855   
1.5A Fast Ultra Low Dropout Linear Regulator 		Click link to Download

Features
•Ultra low dropout voltage
•Stable with selected ceramic capacitors
•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
•Overtemperature/overcurrent protection
•-40°C to +125°C junction temperature range

Description

The LP3852/LP3855 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 LP3852/LP3855 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3852/LP3855 to operate under extremely low dropout conditions.

Dropout Voltage: Ultra low dropout voltage; typically 24mV at 150mA load current and 240mV at 1.5A load current.

Ground Pin Current: Typically 4mA 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
LP3855-ADJAdjustable Output Version
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
LP3855-ADJAdjustable Output Version
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 / ValuesLP3855 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 Voltage0.24 Volt 0.130 Volt 0.130 Volt 0.18 Volt
Adjustable OutputNo Yes No No
Quiescent Current3 mA 10 mA 10 mA 10 mA
On/Off PinYes Yes Yes No
Error FlagNo 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
LP3852/LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators767
Kbytes		15-Sep-06日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-1670: Application Note 1670 LP38513TJ-ADJ Evaluation Board356
Kbytes		23-Jan-09 
AN-1797: Application Note 1797 TO-263 THIN Package2716
Kbytes		10-Mar-08日本語
中文


More Application Notes
TitleSizeDateOther
Language
AN-1676: Application Note 1676 LP38512TS-1.8 Evaluation Board344
Kbytes		5-Nov-07 
AN-1675: Application Note 1675 LP38511TS-1.8 Evaluation Board437
Kbytes		5-Nov-07 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3855EMP-1.8/NOPB
LP3855EMP-1.8

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1522
RS COMPONENTSWorldwide30
$1.88 each at 1K+ pcsreel
of
1000
LP3855EMP-2.5/NOPB
LP3855EMP-2.5

RoHS

Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1996
NEWARKAmericas437
RS COMPONENTSWorldwide602
$1.88 each at 1K+ pcsreel
of
1000
LP3855EMP-3.3/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1702
FARNELLEurope and Asia626
NEWARKAmericas347
RS COMPONENTSWorldwide25
$1.88 each at 1K+ pcsreel
of
1000
LP3855EMP-5.0/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1818
FARNELLEurope and Asia233
RS COMPONENTSWorldwide861
$1.88 each at 1K+ pcsreel
of
1000
LP3855EMPX-1.8/NOPB

RoHS

Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.88 each at 1K+ pcsreel
of
2000
LP3855EMPX-2.5/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.88 each at 1K+ pcsreel
of
2000
LP3855EMPX-3.3/NOPB

RoHS

Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.88 each at 1K+ pcsreel
of
2000
LP3855EMPX-5.0/NOPB

RoHS

Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.88 each at 1K+ pcsreel
of
2000
LP3855ET-1.8/NOPB

RoHS



TO-220		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FARNELLEurope and Asia32
RS COMPONENTSWorldwide12
$1.95 each at 1K+ pcsrail
of
45
LP3855ET-2.5/NOPB

RoHS



TO-220		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide169
FARNELLEurope and Asia7
RS COMPONENTSWorldwide7
$1.95 each at 1K+ pcsrail
of
45
LP3855ET-3.3/NOPB

RoHS



TO-220		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide68
FARNELLEurope and Asia12
RS COMPONENTSWorldwide2
$1.95 each at 1K+ pcsrail
of
45
LP3855ET-5.0/NOPB

RoHS



TO-220		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide239
FUTUREWorldwide180
RS COMPONENTSWorldwide42
$1.95 each at 1K+ pcsrail
of
45
LP3855ES-1.8/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
AVNET-EMWorldwide15
DIGIKEYWorldwide77
FARNELLEurope and Asia192
FUTUREWorldwide180
RS COMPONENTSWorldwide24
$1.95 each at 1K+ pcsrail
of
45
LP3855ES-2.5/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
AVNET-EMWorldwide153
DIGIKEYWorldwide473
$1.95 each at 1K+ pcsrail
of
45
LP3855ES-3.3/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide20
DIGIKEYWorldwide50
FARNELLEurope and Asia336
NEWARKAmericas177
RS COMPONENTSWorldwide27
$1.95 each at 1K+ pcsrail
of
45
LP3855ES-5.0/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide50
DIGIKEYWorldwide227
$1.95 each at 1K+ pcsrail
of
45
LP3855ESX-1.8/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.95 each at 1K+ pcsreel
of
500
LP3855ESX-2.5/NOPB
LP3855ESX-2.5

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.95 each at 1K+ pcsreel
of
500
LP3855ESX-3.3/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.95 each at 1K+ pcsreel
of
500
LP3855ESX-5.0/NOPB

RoHS



TO-263		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.95 each at 1K+ pcsreel
of
500

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3855EMP-1.8/NOPB
LP3855EMP-1.8
SOT-22351
1		260
260		RoHSDownloadN/A
XYTT
LHYB
LP3855EMP-2.5/NOPB
LP3855EMP-2.5
SOT-22351
1		260
260		RoHSDownloadN/A
XYTT
LHZB
LP3855EMP-3.3/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LJ1B
LP3855EMP-5.0/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LJ2B
LP3855EMPX-1.8/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHYB
LP3855EMPX-2.5/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LHZB
LP3855EMPX-3.3/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LJ1B
LP3855EMPX-5.0/NOPB
SOT-22351260RoHSDownloadN/A
XYTT
LJ2B
LP3855ET-1.8/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3855ET
-1.8
LP3855ET-2.5/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3855ET
-2.5
LP3855ET-3.3/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3855ET
-3.3
LP3855ET-5.0/NOPB
TO-22051NARoHSDownloadN/A
NSUZXYTTE#
LP3855ET
-5.0
LP3855ES-1.8/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-1.8
LP3855ES-2.5/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-2.5
LP3855ES-3.3/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-3.3
LP3855ES-5.0/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-5.0
LP3855ESX-1.8/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-1.8
LP3855ESX-2.5/NOPB
LP3855ESX-2.5
TO-26353
3		245
235		RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-2.5
LP3855ESX-3.3/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-3.3
LP3855ESX-5.0/NOPB
TO-26353245RoHSDownloadN/A
NSUZXYTTE#
LP3855ES
-5.0

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3855EMP-1.8CS065238968520440200011249079519
LP3855EMP-2.5CS065238968520440200011249079519
LP3855EMP-3.3CS065238968520440200011249079519
LP3855EMP-5.0CS065238968520440200011249079519
LP3855EMPX-1.8CS065238968520440200011249079519
LP3855EMPX-2.5CS065238968520440200011249079519
LP3855EMPX-3.3CS065238968520440200011249079519
LP3855EMPX-5.0CS065238968520440200011249079519
LP3855ES-1.8CS065238968520440200011249079519
LP3855ES-2.5CS065238968520440200011249079519
LP3855ES-3.3CS065238968520440200011249079519
LP3855ES-5.0CS065238968520440200011249079519
LP3855ESX-1.8CS065238968520440200011249079519
LP3855ESX-2.5CS065238968520440200011249079519
LP3855ESX-3.3CS065238968520440200011249079519
LP3855ESX-5.0CS065238968520440200011249079519
LP3855ET-1.8CS065238968520440200011249079519
LP3855ET-2.5CS065238968520440200011249079519
LP3855ET-3.3CS065238968520440200011249079519
LP3855ET-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.


[Information as of 22-Nov-2009]