LP3879   
Micropower 800mA Low Noise 'Ceramic Stable' Voltage Regulator for Low Voltage Applications 		Click link to Download

Features
•Standard output voltage: 1.00V, 1.20V
•Custom voltages available from 1.0V to 1.2V (50 mV increments)
•Input voltage: 2.5 to 6V
•1% initial output accuracy
•Designed for use with low ESR ceramic capacitors
•Very low output noise
•Sense option improves load regulation
•8 Lead PSOP and LLP surface mount packages
•<10 µA quiescent current in shutdown
•Low ground pin current at all loads
•High peak current capability
•Over-temperature/over-current protection
•-40°C to +125°C junction temperature range

Description

The LP3879 is a 800 mA fixed-output voltage regulator designed to provide high performance and low noise in applications requiring output voltages between 1.0V and 1.2V.

Using an optimized VIP™ (Vertically Integrated PNP) process, the LP3879 delivers superior performance:

Ground Pin Current: Typically 5.5 mA @ 800 mA load, and 200 µA @ 100 µA load.

Low Power Shutdown: The LP3879 draws less than 10 µA quiescent current when shutdown pin is pulled low.

Precision Output: Guaranteed output voltage accuracy is 1% at room temperature.

Low Noise: Broadband output noise is only 18 µV (typical) with 10 nF bypass capacitor.

Applications
•ASIC Power Supplies In: - Desktops, Notebooks and Graphic Cards - Set Top Boxes, Printers and Copiers
•DSP and FPGA Power Supplies
•SMPS Post-Regulator
•Medical Instrumentation
Also Recommended
LP3878-ADJ▲Adjustable Voltage For 1V To 5V Applications
LP3881▲Vin Down To 1.3V, Vout Down To 1.2V
LP38841▲Vin Down To 1.05V, Vout Down To 0.56V
LP3891▲Vin Down To 1.6V, Vout Down To 1.2V



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Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLP3879 LP3878-ADJ LP3881 LP38841 LP3891
Output Current800 mA 800 mA 800 mA 800 mA 800 mA
Output Min1, 1.2 Volt 1 Volt 1.2 Volt 1.2, 0.8, 1.5 Volt 1.8, 1.2, 1.5 Volt
Input Min Voltage2.5 Volt 2.5 Volt 1.575, 1.875, 1.291 Volt 1.575, 1.275, 0.875 Volt 1.9, 1.3, 1.6 Volt
Input Max Voltage6 Volt 16 Volt 5.5 Volt 5.5 Volt 5.5 Volt
Dropout VoltageUndefined Volt 0.475 Volt 0.075 Volt 0.075 Volt 0.1 Volt
Adjustable OutputNo Yes No No No
Quiescent Current0.2 mA 0.18 mA 4 mA 32 mA 4 mA
PSRR60 dB 60 dB
Voltage Noise (rms)18 uV 18 uV
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, 1.2 Volt Undefined Volt 1.8, 1.2, 1.5 Volt 1.2, 0.8, 1.5 Volt 1.8, 1.2, 1.5 Volt
Output Max1, 1.2 Volt 5.5 Volt 1.8, 1.2, 1.5 Volt 1.2, 0.8, 1.5 Volt 1.8, 1.2, 1.5 Volt

Datasheet
TitleSizeDateOther
Language
LP3879 Micropower 800mA Low Noise 'Ceramic Stable' Voltage Regulator for Low Voltage Applications708
Kbytes		9-Jun-06 


Featured Application Notes
TitleSizeDateOther
Language
AN-1409: Application Note 1409 LP3878-ADJ Evaluation Board430
Kbytes		14-Oct-05 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
LP3879MR-1.0/NOPB

RoHS



PSOP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide437
FUTUREWorldwide260
NEWARKAmericas47
$0.85 each at 1K+ pcsrail
of
95
LP3879MR-1.2/NOPB
LP3879MR-1.2

RoHS



PSOP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide304
DIGIKEYWorldwide0
FUTUREWorldwide760
$0.85 each at 1K+ pcsrail
of
95
LP3879MRX-1.0/NOPB

RoHS



PSOP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.85 each at 1K+ pcsreel
of
2500
LP3879MRX-1.2/NOPB

RoHS



PSOP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.85 each at 1K+ pcsreel
of
2500
LP3879SD-1.0/NOPB

RoHS



LLP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide2722
$0.85 each at 1K+ pcsreel
of
1000
LP3879SD-1.2/NOPB

RoHS



LLP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide1391
FUTUREWorldwide1100
NEWARKAmericas563
$0.85 each at 1K+ pcsreel
of
1000
LP3879SDX-1.0/NOPB

RoHS



LLP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.85 each at 1K+ pcsreel
of
4500
LP3879SDX-1.2/NOPB

RoHS



LLP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.85 each at 1K+ pcsreel
of
4500

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3879MR-1.0/NOPB
PSOP83260RoHSDownloadN/A
NSXYTT
3879
MR1.0
LP3879MR-1.2/NOPB
LP3879MR-1.2
PSOP83
3		260
260		RoHSDownloadN/A
NSXYTT
LP3879
MR1.2
LP3879MRX-1.0/NOPB
PSOP83260RoHSDownloadN/A
NSXYTT
3879
MR1.0
LP3879MRX-1.2/NOPB
PSOP83260RoHSDownloadN/A
NSXYTT
LP3879
MR1.2
LP3879SD-1.0/NOPB
LLP81260RoHSDownloadN/A
NS
UZXYTT
79SD1.0
LP3879SD-1.2/NOPB
LLP81260RoHSDownloadN/A
NS
UZXYTT
79SD1.2
LP3879SDX-1.0/NOPB
LLP81260RoHSDownloadN/A
NS
UZXYTT
79SD1.0
LP3879SDX-1.2/NOPB
LLP81260RoHSDownloadN/A
NS
UZXYTT
79SD1.2

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3879MR-1.0VIP1+0241000027850002790251354
LP3879MR-1.2VIP1+0241000027850002790251354
LP3879MRX-1.0VIP1+0241000027850002790251354
LP3879MRX-1.2VIP1+0241000027850002790251354
LP3879SD-1.0VIP1+0241000027850002790251354
LP3879SD-1.2VIP1+0241000027850002790251354
LP3879SDX-1.0VIP1+0241000027850002790251354
LP3879SDX-1.2VIP1+0241000027850002790251354

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]