LP3990   
150mA Linear Voltage Regulator for Digital Applications 		Click link to Download

Features
•1% Voltage Accuracy at Room Temperature
•Stable with Ceramic Capacitor
•Logic Controlled Enable
•No Noise Bypass Capacitor Required
•Thermal-Overload and Short-Circuit Protection

Description

The LP3990 regulator is designed to meet the requirements of portable, battery-powered systems providing an accurate output voltage, low noise, and low quiescent current. The LP3990 will provide a 0.8V output from the low input voltage of 2V at up to 150mA load current. When switched into shutdown mode via a logic signal at the enable pin, the power consumption is reduced to virtually zero.

The LP3990 is designed to be stable with space saving ceramic capacitors as small as 1.0µF.

Performance is specified for a -40°C to 125°C junction temperature range.

For output voltages other than 0.8V, 1.2, 1.35V, 1.5V, 1.8V, 2.5V, 2.8V, or 3.3V please contact your local NSC sales office.

Key Specification

Input Voltage Range

2.0 to 6.0V

Output Voltage Range

0.8 to 3.3V

Output Current

150mA

Output Stable - Capacitors

1.0uF

Virtually Zero IQ (Disabled)

<10nA

Very Low IQ (Enabled)

43uA

Low Output Noise

150uVRMS

PSRR

55dB at 1kHz

Fast Start Up

105us

Applications
•Cellular Handsets
•Hand-Held Information Appliances
Also Recommended
LP3878-ADJ▲800Ma Ldo, Adj Output Down To 1.0V



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Also Recommended
LP3878-ADJ▲800Ma Ldo, Adj Output Down To 1.0V

Typical Application
click for larger image


Connection Diagram
click for larger image



Typical Performance
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Paramaters / ValuesLP3990 LP3878-ADJ
Output Current150 mA 800 mA
Output Min1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt 1 Volt
Input Min Voltage2, 2.3, 3.3, 3, 3.8 Volt 2.5 Volt
Input Max Voltage6 Volt 16 Volt
Dropout Voltage0.06 Volt 0.475 Volt
Adjustable OutputNo Yes
Quiescent Current0.043 mA 0.18 mA
On/Off PinYes Yes
Error FlagNo No
RegTypeLDO LDO
Temperature Min-40 deg C -40 deg C
Temperature Max125 deg C 125 deg C
Output Voltage1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt Undefined Volt
Output Max1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt 5.5 Volt

Datasheets
TitleSizeDateOther
Language
LP3990 150mA Linear Voltage Regulator for Digital Applications337
Kbytes		16-Oct-08 


Featured Application Notes
TitleSizeDateOther
Language
AN-1228: Application Note 1228 LP3986 microSMD Evaluation Board Instruction29
Kbytes		14-May-04 


More Application Notes
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AN-1342: Application Note 1342 LP3994 microSMD Evaluation Board Information79
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AN-1416: Application Note 1416 LP3991TL micro SMD Evaluation Board Information1212
Kbytes		11-Mar-07 中文
AN-1377: Application Note 1377 LP3996 / LP5996 Application Board Information514
Kbytes		3-Nov-06 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LP3990MF-1.2/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide613
FARNELLEurope and Asia1116
FUTUREWorldwide1100
NEWARKAmericas161
RS COMPONENTSWorldwide275
$0.32 each at 1K+ pcsreel
of
1000
LP3990MF-1.5/NOPB

RoHS



SOT-23		Lifetime buy
Lead Time: 12 weeks

 
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide98
FARNELLEurope and Asia1303
RS COMPONENTSWorldwide950
$0.32 each at 1K+ pcsreel
of
1000
LP3990MF-1.8/NOPB

RoHS



SOT-23		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
AITGAsia Pacific900
ARROWWorldwide5000
DIGIKEYWorldwide3160
FARNELLEurope and Asia2220
FUTUREWorldwide1100
NEWARKAmericas564
RS COMPONENTSWorldwide580
$0.32 each at 1K+ pcsreel
of
1000
LP3990MF-2.5/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1903
FARNELLEurope and Asia2565
FUTUREWorldwide1100
NEWARKAmericas761
RS COMPONENTSWorldwide170
$0.32 each at 1K+ pcsreel
of
1000
LP3990MF-2.8/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AVNET-EMWorldwide4000
DIGIKEYWorldwide1273
FARNELLEurope and Asia766
RS COMPONENTSWorldwide480
$0.32 each at 1K+ pcsreel
of
1000
LP3990MF-3.3/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide3000
AVNET-EMWorldwide1000
DIGIKEYWorldwide1278
FARNELLEurope and Asia809
FUTUREWorldwide1100
NEWARKAmericas53
RS COMPONENTSWorldwide180
$0.32 each at 1K+ pcsreel
of
1000
LP3990MFX-1.2/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990MFX-1.8/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AVNET-EMWorldwide3000
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990MFX-2.5/NOPB

RoHS



SOT-23		Lifetime buy
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990MFX-3.3/NOPB

RoHS



SOT-23		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990SD-0.8/NOPB

RoHS



LLP		Lifetime buy
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.34 each at 1K+ pcsreel
of
1000
LP3990SD-1.2/NOPB

RoHS



LLP		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
AVNET-EMWorldwide2000
DIGIKEYWorldwide2105
$0.34 each at 1K+ pcsreel
of
1000
LP3990SD-1.5/NOPB

RoHS



LLP		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1995
$0.34 each at 1K+ pcsreel
of
1000
LP3990SD-1.8/NOPB

RoHS



LLP		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide2000
$0.34 each at 1K+ pcsreel
of
1000
LP3990SD-2.5/NOPB

RoHS



LLP		Lifetime buy
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.34 each at 1K+ pcsreel
of
1000
LP3990SD-2.8/NOPB

RoHS



LLP		Lifetime buy
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.34 each at 1K+ pcsreel
of
1000
LP3990TL-0.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide1059
FARNELLEurope and Asia948
RS COMPONENTSWorldwide5
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-1.2/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 10 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide226
FUTUREWorldwide1100
RS COMPONENTSWorldwide10
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-1.35/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1243
FARNELLEurope and Asia1152
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-1.5/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide439
FARNELLEurope and Asia1141
RS COMPONENTSWorldwide5
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-1.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide2896
FUTUREWorldwide500
NEWARKAmericas233
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-2.5/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide6263
$0.32 each at 1K+ pcsreel
of
250
LP3990TL-2.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
DIGIKEYWorldwide1280
FARNELLEurope and Asia656
RS COMPONENTSWorldwide240
$0.32 each at 1K+ pcsreel
of
250
LP3990TLX-0.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-1.2/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-1.35/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-1.5/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-1.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide1100
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-2.5/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000
LP3990TLX-2.8/NOPB

RoHS



MICRO SMD		Full production
Lead Time: 12 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$0.32 each at 1K+ pcsreel
of
3000

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP3990MF-1.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990MFX-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-0.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990YD-1.2
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990YD-1.5
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008
LP3990YD-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LP3990MF-1.2/NOPB
SOT-2351260RoHSDownloadN/A
SCDB
XTT
LP3990MF-1.5/NOPB
SOT-2351260RoHSDownloadN/A
SCEB
XTT
LP3990MF-1.8/NOPB
SOT-2351260RoHSDownloadN/A
SCFB
XTT
LP3990MF-2.5/NOPB
SOT-2351260RoHSDownloadN/A
SCJB
XTT
LP3990MF-2.8/NOPB
SOT-2351260RoHSDownloadN/A
SCKB
XTT
LP3990MF-3.3/NOPB
SOT-2351260RoHSDownloadN/A
SCLB
XTT
LP3990MFX-1.2/NOPB
SOT-2351260RoHSDownloadN/A
SCDB
XTT
LP3990MFX-1.8/NOPB
SOT-2351260RoHSDownloadN/A
SCFB
XTT
LP3990MFX-2.5/NOPB
SOT-2351260RoHSDownloadN/A
SCJB
XTT
LP3990MFX-3.3/NOPB
SOT-2351260RoHSDownloadN/A
SCLB
XTT
LP3990SD-0.8/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L085B
LP3990SD-1.2/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L086B
LP3990SD-1.5/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L087B
LP3990SD-1.8/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L088B
LP3990SD-2.5/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L090B
LP3990SD-2.8/NOPB
LLP61260RoHSDownloadN/A
ZXYTT
L091B
LP3990TL-0.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-1.2/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-1.35/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-1.5/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-1.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-2.5/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TL-2.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-0.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-1.2/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-1.35/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-1.5/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-1.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-2.5/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I
LP3990TLX-2.8/NOPB
MICRO SMD41260RoHSDownloadN/A
X
I

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP3990MF-1.2CMOS70184060010890004309006723
LP3990MF-1.5CMOS70184060010890004309006723
LP3990MF-1.8CMOS70184060010890004309006723
LP3990MF-2.5CMOS70184060010890004309006723
LP3990MF-2.8CMOS70184060010890004309006723
LP3990MF-3.3CMOS70184060010890004309006723
LP3990MFX-1.2CMOS70184060010890004309006723
LP3990MFX-1.8CMOS70184060010890004309006723
LP3990MFX-2.5CMOS70184060010890004309006723
LP3990MFX-3.3CMOS70184060010890004309006723
LP3990SD-0.8CMOS70184060010890004309006723
LP3990SD-1.2CMOS70184060010890004309006723
LP3990SD-1.35CMOS70184060010890004309006723
LP3990SD-1.5CMOS70184060010890004309006723
LP3990SD-1.8CMOS70184060010890004309006723
LP3990SD-2.5CMOS70184060010890004309006723
LP3990SD-2.8CMOS70184060010890004309006723
LP3990SDX-1.35CMOS70184060010890004309006723
LP3990TL-0.8CMOS70184060010890004309006723
LP3990TL-1.2CMOS70184060010890004309006723
LP3990TL-1.35CMOS70184060010890004309006723
LP3990TL-1.5CMOS70184060010890004309006723
LP3990TL-1.8CMOS70184060010890004309006723
LP3990TL-2.5CMOS70184060010890004309006723
LP3990TL-2.8CMOS70184060010890004309006723
LP3990TLX-0.8CMOS70184060010890004309006723
LP3990TLX-1.2CMOS70184060010890004309006723
LP3990TLX-1.35CMOS70184060010890004309006723
LP3990TLX-1.5CMOS70184060010890004309006723
LP3990TLX-1.8CMOS70184060010890004309006723
LP3990TLX-2.5CMOS70184060010890004309006723
LP3990TLX-2.8CMOS70184060010890004309006723

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
LP3990MF-1.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990MFX-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-0.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-2.5
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990SD-2.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990YD-1.2
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP3990YD-1.5
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008
LP3990YD-1.8
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 24-Nov-2009]