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LP2951
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MFG:MICREL Package Cooled:DIP

LP2 Series Datasheet download

Five Points

Part Number: LP2951

MFG: MICREL

Package Cooled: DIP

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

LP2951 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)
LP2951ACM	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACM-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACM-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMM	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMM-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMM-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMMX	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMMX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMMX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMX	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACMX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACN	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACN-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACN-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSD	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSD-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSD-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSDX	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSDX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951ACSDX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951C MDC	SLM	0	42786	0	0	3352500	2	951281028
LP2951C MWC	SLM	0	42786	0	0	3352500	2	951281028
LP2951C-3.3 MDC	SLM	0	42786	0	0	3352500	2	951281028
LP2951C-3.3 MWC	SLM	0	42786	0	0	3352500	2	951281028
LP2951CM	SLM	0	42786	0	0	3352500	2	951281028
LP2951CM-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CM-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMM	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMM-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMM-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMMX	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMMX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMMX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMX	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CMX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CN	SLM	0	42786	0	0	3352500	2	951281028
LP2951CN-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CN-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSD	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSD-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSD-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSDX	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSDX-3.0	SLM	0	42786	0	0	3352500	2	951281028
LP2951CSDX-3.3	SLM	0	42786	0	0	3352500	2	951281028
LP2951E/883	SLM	0	42786	0	0	3352500	2	951281028
LP2951H/883	SLM	0	42786	0	0	3352500	2	951281028
LP2951J/883	SLM	0	42786	0	0	3352500	2	951281028
LP2951WG/883	SLM	0	42786	0	0	3352500	2	951281028

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

Title	Size in Kbytes	Date
Power Reference Design Library	0 Kbytes	28-Mar-2006	View

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

LP2951 Maximum Ratings

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

LP2951 Connection Diagram

LP2951 datasheet

LP2951
PDF/DataSheet Download

Datasheet: LP2951
File Size: 69046 KB
Manufacturer: FAIRCHILD [Fairchild Semiconductor]
Click here to Download

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Related Part Number

LP2951 Relative Products

LP2950CZ-5.0G
IC REG LDO 100MA 5V TO92
LP2950CZ-5.0/NOPB
IC VREG 5V MICRPWR TO-92
LP2950CZ-5.0
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LP2950CZ-3.3RAG
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