LP2951

100mA Low Dropout Voltage Regulator (LDOs)

Description

The LP2950 and LP2951 are low power voltage regulators. These devices are an excellent choice for use in battery powered application such as cordless telephones, radio control systems and portable computers. The LP2950 and LP2951 feature low quiescent current and low dropout voltage (typical 50mV at light load and 380mV at 100mA). This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical) and very low output temperature coefficient (20 ppm/ºC typical), making the LP2950/LP2951 useful as a low power voltage reference.

The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling input voltage. The logic-compatible shutdown feature enables the regulator to be switched on and off. The LP2950 is offered in a 3-pin TO-92 package compatible with other 5V, 3.3V regulators. The LP2951 is available in an 8-lead SOIC package.

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Features

  • 5.0V and 3.3V versions at 100mA output
  • Very low quiescent current
  • Low dropout voltage: 380mV at 100mA
  • Extremely tight load and line regulation
  • Very low temperature coefficient
  • Current and thermal limiting
  • Need only 1 uF for stability
  • Error flag warns of output dropout
  • Logic controlled electronic shutdown
  • 5.0V part allows adjustable output from 1.25V to 29V

Application

Design Tools

Technical Library

Packaging

Pkg Code Details Quantities Dimensions PDF
NSOIC8
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.65 max
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
LP2951ACS-3-3 NSOIC8 OBS
LP2951ACS-3-3/TR NSOIC8 OBS
LP2951ACS-5-0 NSOIC8 OBS
LP2951ACS-5-0/TR NSOIC8 OBS
LP2951ACS-L-3-3 NSOIC8 OBS Suggested:
LP2951CS-L
LP2951ACS-L-3-3/TR NSOIC8 OBS Suggested:
LP2951CS-L
LP2951ACS-L-5-0 NSOIC8 OBS Suggested:
LP2951CS-L
LP2951ACS-L-5-0/TR NSOIC8 OBS Suggested:
LP2951CS-L
LP2951CS-3-3 NSOIC8 OBS
LP2951CS-3-3/TR NSOIC8 OBS
LP2951CS-5-0 NSOIC8 OBS
LP2951CS-5-0/TR NSOIC8 OBS
LP2951CS-L-3-3 NSOIC8 OBS Suggested:
LP2951CS-L-3-3/TR
LP2951CS-L-3-3/TR NSOIC8 Active
LP2951CS-L-5-0 NSOIC8 OBS Suggested:
LP2951CS-L-5-0/TR
LP2951CS-L-5-0/TR NSOIC8 Active
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Distribution Date Description File
02/23/2017 Qualification of alternate assembly subcon, ANST, China. PCN 16-1149-02-01 ANST-1033.pdf
02/15/2017 Qualification of alternate assembly subcon, ANST. PCN 16-1149-02 ANST-1033.pdf
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
04/13/2016 Qualification of alternate assembly subcon, JCET. PCN 16-0207-02 JCET-1033.pdf
07/02/2013 Qualification of an alternate qualified assembly supplier, ASE Chung-Li (Taiwan) for the 8L NSOIC package using copper wire bonding. Material change and alternate assembly supplier qualified. PCN_12-1107-01-1033.pdf
03/23/2010 Alternate qualified assembly supplier Capacity enhancement PCN_10-0311-01-1033.pdf
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free). PCN_09-0911-01-1033.pdf
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand PDN_090304-01-1033.pdf
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued. POL_022807-1033.pdf
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site PCN-06-0130-52-1033.pdf