LP3990 - 150mA Linear Voltage Regulator for Digital Applications
Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

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

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

General 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. More...


Applications

•Cellular Handsets
•Hand-Held Information Appliances
  Typical Application
click for larger image


ParametersValues
Output Current 150 mA
Output Min 1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt
Input Min Voltage 2, 2.3, 3.3, 3, 3.8 Volt
Input Max Voltage 6 Volt
Dropout Voltage 0.06 Volt
Adjustable Output No
Quiescent Current 0.043 mA
On/Off Pin Yes
Error Flag No
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Voltage 1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt
Output Max 1.8, 1.35, 2.5, 0.8, 1.2, 3.3, 2.8, 1.5 Volt


Typical Performance

click for larger image


  Also Recommended
LP3878-ADJ▲800Ma Ldo, Adj Output Down To 1.0V
Additional Resources
Online Seminars Application Notes


Connection Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP3990 150mA Linear Voltage Regulator for Digital Applications 337
Kbytes		 16-Oct-08 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LP3990MF-1.5SOT-235NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.32reel
of
1000		SCEB
XTT
12 weeks2000
LP3990MF-1.2SOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		SCDB
XTT
12 weeks2000
LP3990MF-1.8SOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		SCFB
XTT
8 weeks3000
LP3990MF-2.5SOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		SCJB
XTT
12 weeks2500
LP3990MF-2.8SOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
1000		SCKB
XTT
12 weeks2000
LP3990MF-3.3SOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		SCLB
XTT
12 weeks2000
LP3990MFX-2.5SOT-235NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.32reel
of
3000		SCJB
XTT
12 weeks5000
LP3990MFX-1.2SOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		SCDB
XTT
12 weeks7500
LP3990MFX-1.8SOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		SCFB
XTT
12 weeks5000
LP3990MFX-3.3SOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		SCLB
XTT
12 weeks5000
LP3990SD-0.8LLP6NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L085B
12 weeksN/A
LP3990SD-2.5LLP6NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L090B
12 weeksN/A
LP3990SD-2.8LLP6NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L091B
12 weeksN/A
LP3990SD-1.2LLP6NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L086B
12 weeks2000
LP3990SD-1.5LLP6NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L087B
12 weeks2000
LP3990SD-1.8LLP6NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.34reel
of
1000		ZXYTT
L088B
12 weeks5000
LP3990TL-0.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TL-1.2MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
10 weeksN/A
LP3990TL-1.35MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TL-1.5MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TL-1.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TL-2.5MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TL-2.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LP3990TLX-0.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
12 weeksN/A
LP3990TLX-1.2MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
12 weeksN/A
LP3990TLX-1.35MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
8 weeksN/A
LP3990TLX-1.5MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
12 weeksN/A
LP3990TLX-1.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
6 weeksN/A
LP3990TLX-2.5MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
6 weeksN/A
LP3990TLX-2.8MICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
12 weeksN/A

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

General 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.

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.


More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1342: Application Note 1342 LP3994 microSMD Evaluation Board Information 79
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AN-1416: Application Note 1416 LP3991TL micro SMD Evaluation Board Information 1212
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AN-1416 (Chinese): Application Note 1416 LP3991TL micro SMD Evaluation Board Information
 210 Kbytes  
AN-1377: Application Note 1377 LP3996 / LP5996 Application Board Information 514
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AN-1377 (Chinese): Application Note 1377 LP3996 / LP5996 Application Board Information
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If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 8-Nov-2009]