LP2951 - Series of Adjustable Micropower Voltage Regulators

Datasheet Packaging Samples & Pricing Reliability Design Tools Knowledge Base

Features
•5V, 3V, and 3.3V versions available
•High accuracy output voltage
•Guaranteed 100mA output current
•Extremely low quiescent current
•Low dropout voltage
•Extremely tight load and line regulation
•Very low temperature coefficient
•Use as Regulator or Reference
•Needs minimum capacitance for stability
•Current and Thermal Limiting
•Stable with low-ESR output capacitors (10mΩ to 6Ω)

General Description

The LP2950 and LP2951 are micropower voltage regulators with very low quiescent current (75μA typ.) and very low dropout voltage (typ. More...


  Typical Application
*click for larger image

Typical Application for LP2951

Parametric Table     expand
Parametric Table    collapse
Output Current 100 mA
Output Min 3.3, 3, 1.24 Volt
Input Min Voltage -0.3 Volt
Input Max Voltage 30 Volt
Dropout Voltage 0.38 Volt
Adjustable Output No, Yes
Quiescent Current 0.075 mA
Output Current 100 mA
Output Min 3.3, 3, 1.24 Volt
Input Min Voltage -0.3 Volt
Input Max Voltage 30 Volt
Dropout Voltage 0.38 Volt
Adjustable Output No, Yes
Quiescent Current 0.075 mA
On/Off Pin Yes
Error Flag Yes
RegType LDO
Temperature Min -40 deg C
Temperature Max 125 deg C
Output Max 3.3, 3, 29 Volt
Output Voltage 3.3, 3 Volt
View Using Catalog


Typical Performance

click for larger image


  Also Recommended
LP38691Higher Load Capability & Lower Ground Current
LP38693Higher Load Capability & Lower Ground Current
LP3878-ADJImproved Output Current
LP5900Wide Selection Of Voltage Options

Additional Resources

Design Tools (see below)


Connection Diagram

*click for larger image

8-Lead Dual In-Line Connection Diagram

*click for larger image

8-Lead LLP Connection Diagram (Top View)

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators 723 Kbytes 17-Jun-09 Download
LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators (Japanese)
 1012 Kbytes   Download
LP2951 Mil-Aero (JAN) Datasheet MJLP2951-X 268 Kbytes   Download
LP2951 Mil-Aero Datasheet MNLP2951-X 267 Kbytes   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
LP2951ACMSOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32rail
of
95		NSZXTT
2951
ACMDD
12 weeks5000
LP2951ACM-3.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32rail
of
95		NSZXTT
2951A
CM30DD
8 weeks2500
LP2951ACM-3.3SOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32rail
of
95		NSZXTT
2951A
CM33DD
8 weeks2000
LP2951CMSOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.27rail
of
95		NSZXTT
2951
CMDD
8 weeks5000
LP2951CM-3.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.27rail
of
95		NSZXTT
2951C
M30DD
8 weeks10000
LP2951CM-3.3SOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.27rail
of
95		NSZXTT
2951C
M33DD
8 weeks2000
LP2951ACMXSOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
2500		NSZXTT
2951
ACMDD
6 weeks25000
LP2951ACMX-3.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
2500		NSZXTT
2951A
CM30DD
8 weeks10000
LP2951ACMX-3.3SOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
2500		NSZXTT
2951A
CM33DD
8 weeks10000
LP2951CMXSOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.27reel
of
2500		NSZXTT
2951
CMDD
8 weeks15000
LP2951CMX-3.0SOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.27reel
of
2500		NSZXTT
2951C
M30DD
8 weeks7500
LP2951CMX-3.3SOIC NARROW8STD
NOPB		1
1		235
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.27reel
of
2500		NSZXTT
2951C
M33DD
16 weeks75000
LP2951ACMMMINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.36reel
of
1000		ZXTT
L0DA
16 weeks15000
LP2951ACMM-3.0MINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.36reel
of
1000		ZXTT
L0BA
16 weeks15000
LP2951ACMM-3.3MINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.36reel
of
1000		ZXTT
L0CA
16 weeks7500
LP2951CMMMINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		ZXTT
L0DB
16 weeks15000
LP2951CMM-3.0MINI SOIC8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		ZXTT
L0BB
8 weeks2500
LP2951CMM-3.3MINI SOIC8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		ZXTT
L0CB
8 weeks5000
LP2951ACMMXMINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.36reel
of
3500		ZXTT
L0DA
16 weeks40000
LP2951ACMMX-3.0MINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.36reel
of
3500		ZXTT
L0BA
16 weeks5000
LP2951ACMMX-3.3MINI SOIC8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.36reel
of
3500		ZXTT
L0CA
16 weeks7500
LP2951CMMXMINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3500		ZXTT
L0DB
16 weeks25000
LP2951CMMX-3.0MINI SOIC8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3500		ZXTT
L0BB
8 weeksN/A
LP2951CMMX-3.3MINI SOIC8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3500		ZXTT
L0CB
16 weeks15000
LP2951ACN-3.0MDIP8RoHS Download ObsoleteN/A
 
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP2951
ACN-3.0
16 weeksN/A
LP2951ACN-3.3MDIP8NOPB1NARoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP2951
ACN-3.3
8 weeks2000
LP2951CN-3.0MDIP8NOPB1NARoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP2951
CN-3.0
8 weeks2000
LP2951CN-3.3MDIP8NOPB1NARoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP2951
CN-3.3
8 weeks1000
LP2951ACNMDIP8STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP
2951ACN
8 weeks5000
LP2951CNMDIP8STD
NOPB		1
1		NA
NA		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.49rail
of
40		NSUZXYTT
LP
2951CN
8 weeks2000
LP2951ACSD-3.0LLP8NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.41reel
of
1000		NS
UZXYTT
51AC30
8 weeks7500
LP2951ACSD-3.3LLP8NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.41reel
of
1000		NS
UZXYTT
51AC33
8 weeks3000
LP2951ACSDLLP8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.41reel
of
1000		NS
UZXYTT
2951AC
8 weeks5000
LP2951CSDLLP8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.38reel
of
1000		NS
UZXYTT
2951ACB
8 weeks3000
LP2951CSD-3.0LLP8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.38reel
of
1000		NS
UZXYTT
51AC30B
8 weeks2000
LP2951CSD-3.3LLP8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.38reel
of
1000		NS
UZXYTT
51AC33B
8 weeks20000
LP2951ACSDX-3.0LLP8NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now 		1K+$0.41reel
of
4500		NS
UZXYTT
51AC30
8 weeksN/A
LP2951ACSDXLLP8STD
NOPB		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.41reel
of
4500		NS
UZXYTT
2951AC
8 weeksN/A
LP2951ACSDX-3.3LLP8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.41reel
of
4500		NS
UZXYTT
51AC33
8 weeks5000
LP2951CSDXLLP8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.38reel
of
4500		NS
UZXYTT
2951ACB
8 weeks75000
LP2951CSDX-3.0LLP8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.38reel
of
4500		NS
UZXYTT
51AC30B
8 weeksN/A
LP2951CSDX-3.3LLP8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.38reel
of
4500		NS
UZXYTT
51AC33B
8 weeksN/A
5962-3870501M2A
(LP2951E/883)		LCC20RoHS Download ObsoleteN/A
 
Buy Now 		25+$24.90rail
of
50		NSZSSXXYYA
LP2951E/883
Q
3870501M2A
10 weeks1000
5962-3870501MGA
(LP2951H/883)		TO-998RoHS Download Lifetime buyN/A
 
Buy Now 		25+$23.90tray
of
20		NS ZSSXXYYA LP2951H/883 Q
5962-3870501MGA
10 weeks100
5962-3870501MPA
(LP2951J/883)		CERDIP8RoHS Download Lifetime buyN/A
 
Buy Now 		25+$14.40rail
of
40		NSZSSXXYYA
LP2951J/883
Q
3870501MPA
8 weeks500
5962-3870501MXA
(LP2951WG/883)		CERPACK10RoHS Download Lifetime buyN/A
 
Buy Now 		25+$18.10tray
of
54		NS
ZSSXXYYA
LP2951WG
Q 5962-38
70501MXA
25 weeks100
5962-3870501BPA
(JL2951BPA)		CERDIP8RoHS Download Full productionN/A
 
Buy Now 		50+$36.10rail
of
40		NS 5962-
3870501BPA
27014 Q
ZSSXXYYA
6 weeks50
JL2951S2ALCC20STD1NARoHS Download Lifetime buyN/A
  CALLrail
of
N/A		NSZSSXXYYA
27014 Q
5962-
3870501S2A
N/AN/A
JL2951SPACERDIP8STD1NARoHS Download ObsoleteN/A
  CALLrail
of
N/A		NSZSSXXYYA
27014 Q
5962-
3870501SPA
N/A50
LP2951C MDCUnpackaged DieObsoleteN/A
  CALLtray
of
N/A		-
N/AN/A
LP2951C-3.3 MDCUnpackaged DieLifetime buyN/A
  CALLtray
of
N/A		-
N/AN/A
LP2951C-3.3 MWCWaferObsoleteN/A
  CALLwafer jar
of
N/A		-
N/AN/A
LP2951C MWCWaferLifetime buyN/A
  CALLwafer jar
of
N/A		-
N/A10000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP2951ACM-MPC
NONE
NONE
08 Jun 1999
LP2951ACN-3.0
MIC2951
MICRO-REL
16 Nov 2008
LP2951ACN-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951ACSD-3.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951ACSD-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951ACSDX-3.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951C-3.3 MDC
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951C-3.3 MWC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LP2951C MDC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LP2951C MWC
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951CN-3.0
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951CN-3.3
NONE
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951E/883
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LP2951H/883
LP2953AMWG/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951J/883
LP2953AMWG/883
NATIONAL SEMICONDUCTOR
01 Dec 2009
LP2951WG/883
LP2953AMWG/883
NATIONAL SEMICONDUCTOR
01 Dec 2009

General Description

The LP2950 and LP2951 are micropower voltage regulators with very low quiescent current (75μA typ.) and very low dropout voltage (typ. 40mV at light loads and 380mV at 100mA). They are ideally suited for use in battery-powered systems. Furthermore, the quiescent current of the LP2950/LP2951 increases only slightly in dropout, prolonging battery life.

The LP2950-5.0 is available in the surface-mount D-Pak package, and in the popular 3-pin TO-92 package for pin-compatibility with older 5V regulators. The 8-lead LP2951 is available in plastic, ceramic dual-in-line, LLP, or metal can packages and offers additional system functions.

One such feature is an error flag output which warns of a low output voltage, often due to falling batteries on the input. It may be used for a power-on reset. A second feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. Also, the part may be pin-strapped for a 5V, 3V, or 3.3V output (depending on the version), or programmed from 1.24V to 29V with an external pair of resistors.

Careful design of the LP2950/LP2951 has minimized all contributions to the error budget. This includes a tight initial tolerance (.5% typ.), extremely good load and line regulation (.05% typ.) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LP2951ACMSLM0427860033525002951281028
LP2951ACM-3.0SLM0427860033525002951281028
LP2951ACM-3.3SLM0427860033525002951281028
LP2951ACMMSLM0427860033525002951281028
LP2951ACMM-3.0SLM0427860033525002951281028
LP2951ACMM-3.3SLM0427860033525002951281028
LP2951ACMMXSLM0427860033525002951281028
LP2951ACMMX-3.0SLM0427860033525002951281028
LP2951ACMMX-3.3SLM0427860033525002951281028
LP2951ACMXSLM0427860033525002951281028
LP2951ACMX-3.0SLM0427860033525002951281028
LP2951ACMX-3.3SLM0427860033525002951281028
LP2951ACNSLM0427860033525002951281028
LP2951ACN-3.0SLM0427860033525002951281028
LP2951ACN-3.3SLM0427860033525002951281028
LP2951ACSDSLM0427860033525002951281028
LP2951ACSD-3.0SLM0427860033525002951281028
LP2951ACSD-3.3SLM0427860033525002951281028
LP2951ACSDXSLM0427860033525002951281028
LP2951ACSDX-3.0SLM0427860033525002951281028
LP2951ACSDX-3.3SLM0427860033525002951281028
LP2951C MDCSLM0427860033525002951281028
LP2951C MWCSLM0427860033525002951281028
LP2951C-3.3 MDCSLM0427860033525002951281028
LP2951C-3.3 MWCSLM0427860033525002951281028
LP2951CMSLM0427860033525002951281028
LP2951CM-3.0SLM0427860033525002951281028
LP2951CM-3.3SLM0427860033525002951281028
LP2951CMMSLM0427860033525002951281028
LP2951CMM-3.0SLM0427860033525002951281028
LP2951CMM-3.3SLM0427860033525002951281028
LP2951CMMXSLM0427860033525002951281028
LP2951CMMX-3.0SLM0427860033525002951281028
LP2951CMMX-3.3SLM0427860033525002951281028
LP2951CMXSLM0427860033525002951281028
LP2951CMX-3.0SLM0427860033525002951281028
LP2951CMX-3.3SLM0427860033525002951281028
LP2951CNSLM0427860033525002951281028
LP2951CN-3.0SLM0427860033525002951281028
LP2951CN-3.3SLM0427860033525002951281028
LP2951CSDSLM0427860033525002951281028
LP2951CSD-3.0SLM0427860033525002951281028
LP2951CSD-3.3SLM0427860033525002951281028
LP2951CSDXSLM0427860033525002951281028
LP2951CSDX-3.0SLM0427860033525002951281028
LP2951CSDX-3.3SLM0427860033525002951281028
LP2951E/883SLM0427860033525002951281028
LP2951H/883SLM0427860033525002951281028
LP2951J/883SLM0427860033525002951281028
LP2951WG/883SLM0427860033525002951281028

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.


Design Tools

TitleSize in Kbytes Date Click link below to Download    
Power Reference Design Library 0 Kbytes 28-Mar-2006 View    

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

[Information as of 5-Jul-2009]