HOME HOME SELECT DESIGN BUY EXPLORE About Us Support My Profile Search

 Products > Analog - Regulators > Linear Regulators - Low Dropout Voltage > Positive Voltage - Adjustable > LP2951

LP2951  Product Folder

Series of Adjustable Micropower Voltage Regulators
Generic P/N 2951
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics		 Application
Notes

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 125 
Multiple Output Capability No 
On/Off Pin Yes 
Error Flag Yes 
InputMin Voltage (Volt) -.30 
InputMax Voltage (Volt) 30 
Output Current (mA) 100 
Dropout Voltage (Volt) .38 
Quiescent Current (mA) .0750 
SecondaryOutput Voltage (Volt) - 
SecondaryOutput Current (Amp) - 
RegType LDO 
Output Min (Volt) 1.24 
Output Max (Volt) 29 
Watchdog No 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LP2950 LP2951 Series of Adjustable Micropower Voltage Regulators 778 Kbytes 18-Sep-03 View Online Download Receive via Email
LP2950 LP2951 Series of Adjustable Micropower Voltage Regulators (JAPANESE)
 704 Kbytes   View Online Download Receive via Email
LP2951 Mil-Aero (JAN) Datasheet MJLP2951-X 268 Kbytes   View Online Download Receive via Email
LP2951 Mil-Aero Datasheet MNLP2951-X 267 Kbytes   View Online Download Receive via Email

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

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LP2951ACMSOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.31rail
of
95		NSXYTT
2951
ACMDD
11-13 weeks150000
LP2951ACM-3.0SOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.31rail
of
95		NSXYTT
2951A
CM30DD
3-5 weeks45000
LP2951ACM-3.3SOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.31rail
of
95		NSXYTT
2951A
CM33DD
10-12 weeks45000
LP2951CMSOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.28rail
of
95		NSXYTT
2951
CMDD
12-14 weeks150000
LP2951CM-3.0SOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.28rail
of
95		NSXYTT
2951C
M30DD
3-5 weeks30000
LP2951CM-3.3SOIC NARROW8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.28rail
of
95		NSXYTT
2951C
M33DD
9-11 weeks75000
LP2951ACMXSOIC NARROW8StatusFull productionN/AN/A 
Buy Now 		1K+$0.31reel
of
2500		NSXYTT
2951
ACMDD
12-14 weeks75000
LP2951ACMX-3.0SOIC NARROW8StatusFull productionN/AN/A 
Buy Now		1K+$0.31reel
of
2500		NSXYTT
2951A
CM30DD
3-5 weeks45000
LP2951ACMX-3.3SOIC NARROW8StatusFull productionN/AN/A 1K+$0.31reel
of
2500		NSXYTT
2951A
CM33DD
9-11 weeks45000
LP2951CMXSOIC NARROW8StatusFull productionN/AN/A 
Buy Now 		1K+$0.28reel
of
2500		NSXYTT
2951
CMDD
12-14 weeks250000
LP2951CMX-3.0SOIC NARROW8StatusFull productionN/AN/A 
Buy Now 		1K+$0.28reel
of
2500		NSXYTT
2951C
M30DD
3-5 weeks45000
LP2951CMX-3.3SOIC NARROW8StatusFull productionN/AN/A 1K+$0.28reel
of
2500		NSXYTT
2951C
M33DD
10-12 weeks75000
LP2951ACMMMINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.40reel
of
1000		ZXTT
L0DA
14 weeks0
LP2951ACMM-3.0MINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.40reel
of
1000		ZXTT
L0BA
13 weeks0
LP2951ACMM-3.3MINI SOIC8StatusFull productionN/AN/ASamples
Buy Now		1K+$0.40reel
of
1000		ZXTT
L0CA
14 weeks0
LP2951CMMMINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now		1K+$0.37reel
of
1000		ZXTT
L0DB
14 weeks0
LP2951CMM-3.0MINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.37reel
of
1000		ZXTT
L0BB
13 weeks0
LP2951CMM-3.3MINI SOIC8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.37reel
of
1000		ZXTT
L0CB
14 weeks0
LP2951ACMMXMINI SOIC8StatusFull productionN/AN/A 1K+$0.40reel
of
3500		ZXTT
L0DA
13 weeks0
LP2951ACMMX-3.0MINI SOIC8StatusFull productionN/AN/A 1K+$0.40reel
of
3500		ZXTT
L0BA
13 weeks0
LP2951ACMMX-3.3MINI SOIC8StatusFull productionN/AN/A 
Buy Now 		1K+$0.40reel
of
3500		ZXTT
L0CA
14 weeks0
LP2951CMMXMINI SOIC8StatusFull productionN/AN/A 
Buy Now		1K+$0.37reel
of
3500		ZXTT
L0DB
13 weeks0
LP2951CMMX-3.0MINI SOIC8StatusFull productionN/AN/A 1K+$0.37reel
of
3500		ZXTT
L0BB
13 weeks0
LP2951CMMX-3.3MINI SOIC8StatusFull productionN/AN/A 1K+$0.37reel
of
3500		ZXTT
L0CB
14 weeks0
LP2951ACNMDIP8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.34rail
of
40		NSUZXYTT
LP
2951ACN
11-13 weeks100000
LP2951ACN-3.0MDIP8StatusFull productionN/AN/A 1K+$0.34rail
of
40		NSUZXYTT
LP2951
ACN-3.0
3-5 weeks100000
LP2951ACN-3.3MDIP8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.34rail
of
40		NSUZXYTT
LP2951
ACN-3.3
9-11 weeks100000
LP2951CNMDIP8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.37rail
of
40		NSUZXYTT
LP
2951CN
11-13 weeks60000
LP2951CN-3.0MDIP8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.37rail
of
40		NSUZXYTT
LP2951
CN-3.0
3-5 weeks30000
LP2951CN-3.3MDIP8StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$0.37rail
of
40		NSUZXYTT
LP2951
CN-3.3
9-11 weeks100000
5962-3870501M2ALCC20StatusFull productionN/AN/A 
Buy Now		25+$24.20rail
of
50		NSZSSXXYYA
LP2951E/883
QL>
3870501M2A
12-15 weeks500
5962-3870501MGATO-58StatusFull productionN/AN/A 
Buy Now		25+$22.80tray
of
20		NS ZSSXXYYA LP2951H/883QL
5962-3870501MGA >
8-10 weeks500
5962-3870501MPACERDIP8StatusFull productionN/AN/A 
Buy Now		25+$13.70rail
of
40		NSZSSXXYYA>
LP2951J/883
Q
3870501MPA
6-10 weeks500
5962-3870501MXACERPACK10StatusFull productionN/AN/A 25+$16.90tray
of
54		NS
ZSSXXYYA
LP2951WG
/Q5962-38
70501MXA
10-13 weeks500
5962-3870501BPACERDIP8StatusFull productionN/AN/A 
Buy Now		50+$35.20rail
of
40		NS 5962-
3870501BPA
27014 Q
ZSSXXYYA>
6-8 weeks500
JL2951S2ALCC20StatusFull productionN/AN/A   rail
of
N/A		NSZSSXXYYA
27014 QL>
5962-
3870501S2A
13-15 weeks500
5962-3870501SPACERDIP8StatusFull productionN/AN/A 50+$207.00rail
of
40		NSZSSXXYYA>
27014 Q
5962-
3870501SPA
13-15 weeks0
LP2951A MDCUnpackaged DieFull productionN/AN/A   tray
of
N/A		-
N/A0
LP2951A-3.3 MDCUnpackaged DieFull productionN/AN/ASamples  tray
of
N/A		-
N/A0
LP2951C MDCUnpackaged DieFull productionN/AN/ASamples  tray
of
N/A		-
N/A0
LP2951C-3.3 MDCUnpackaged DieFull productionN/AN/ASamples  tray
of
N/A		-
N/A0
LP2951A MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0
LP2951A-3.3 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0
LP2951C MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
4 weeks0
LP2951C-3.3 MWCWaferFull productionN/AN/A   wafer jar
of
N/A		-
N/A0

Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LP2951ACM-MPC
LP2951WG/883
NATIONAL SEMICONDUCTOR
06/08/99
LP2951C DICE
LM2951C DWF
NATIONAL SEMICONDUCTOR
04/04/95
LP2951H
LP2951J
NATIONAL SEMICONDUCTOR
07/15/95
LP2951J
NSC LP2951J/883
NATIONAL SEMICONDUCTOR
07/14/96

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, 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.

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

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LP2951A MDCSLM0350000015000003424108012
LP2951A MWCSLM0350000015000003424108012
LP2951A-3.3 MDCSLM0350000015000003424108012
LP2951A-3.3 MWCSLM0350000015000003424108012
LP2951ACMSLM0350000015000003424108012
LP2951ACM-3.0SLM0350000015000003424108012
LP2951ACM-3.3SLM0350000015000003424108012
LP2951ACMMSLM0350000015000003424108012
LP2951ACMM-3.0SLM0350000015000003424108012
LP2951ACMM-3.3SLM0350000015000003424108012
LP2951ACMMXSLM0350000015000003424108012
LP2951ACMMX-3.0SLM0350000015000003424108012
LP2951ACMMX-3.3SLM0350000015000003424108012
LP2951ACMXSLM0350000015000003424108012
LP2951ACMX-3.0SLM0350000015000003424108012
LP2951ACMX-3.3SLM0350000015000003424108012
LP2951ACNSLM0350000015000003424108012
LP2951ACN-3.0SLM0350000015000003424108012
LP2951ACN-3.3SLM0350000015000003424108012
LP2951C MDCSLM0350000015000003424108012
LP2951C MWCSLM0350000015000003424108012
LP2951C-3.3 MDCSLM0350000015000003424108012
LP2951C-3.3 MWCSLM0350000015000003424108012
LP2951CMSLM0350000015000003424108012
LP2951CM-3.0SLM0350000015000003424108012
LP2951CM-3.3SLM0350000015000003424108012
LP2951CMMSLM0350000015000003424108012
LP2951CMM-3.0SLM0350000015000003424108012
LP2951CMM-3.3SLM0350000015000003424108012
LP2951CMMXSLM0350000015000003424108012
LP2951CMMX-3.0SLM0350000015000003424108012
LP2951CMMX-3.3SLM0350000015000003424108012
LP2951CMXSLM0350000015000003424108012
LP2951CMX-3.0SLM0350000015000003424108012
LP2951CMX-3.3SLM0350000015000003424108012
LP2951CNSLM0350000015000003424108012
LP2951CN-3.0SLM0350000015000003424108012
LP2951CN-3.3SLM0350000015000003424108012
LP2951E/883SLM0350000015000003424108012
LP2951H/883SLM0350000015000003424108012
LP2951J/883SLM0350000015000003424108012
LP2951WG/883SLM0350000015000003424108012

For more information on Reliablitity Metrics, please click here.


Application Notes

TitleSize in KbytesDate
View Online
Download
Receive via Email
AN-1148: Application Note 1148 Linear Regulators: Theory of Operation and Compensation 200 Kbytes 25-Sep-02 View Online Download Receive via Email
AN-853: Power Fail Circuit-Working with NS32FX200 67 Kbytes 5-Aug-95 View Online Download Receive via Email
AN-893: Using External Oscillators for the DP857X Real Time Clocks with the Battery Backed Mode Selection 73 Kbytes 5-Aug-95 View Online Download Receive via Email
AN-908: Specification for the DECT ARi Interface to the Radio Frequency Front End 143 Kbytes 5-Aug-95 View Online Download Receive via Email

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

[Information as of 15-Jan-2004]

Website Guide • About "Cookies" • National is QS 9000 Certified • Privacy/Security Statement • Contact Us/Feedback
Site Terms & Conditions of Use • Copyright 2003© National Semiconductor Corporation