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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.1 Vin (Max) (V) 30 Vin (Min) (V) 2 Vout (Max) (V) 5 Vout (Min) (V) 3 Fixed output options (V) 3, 3.3, 5 Noise (uVrms) 100 Iq (Typ) (mA) 0.075 Thermal resistance θJA (°C/W) 97 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 3 PSRR @ 100 KHz (dB) 57 Dropout voltage (Vdo) (Typ) (mV) 110 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-92 (LP) 3 19 mm² 5.2 x 3.68 open-in-new Find other Linear regulators (LDO)

Features

  • Wide Input Range: Up to 30 V
  • Rated Output Current of 100 mA
  • Low Dropout: 380 mV (Typ) at 100 mA
  • Low Quiescent Current: 75 µA (Typ)
  • Tight Line Regulation: 0.03% (Typ)
  • Tight Load Regulation: 0.04% (Typ)
  • High VO Accuracy
    • 1.4% at 25°C
    • 2% Over Temperature
  • Can Be Used as a Regulator or Reference
  • Stable With Low ESR (>12 mΩ) Capacitors
  • Current- and Thermal-Limiting Features
  • LP2950 Only (3-Pin)
    • Fixed-Output Voltages of 5 V, 3.3 V, and 3 V
  • LP2951 Only (8-Pin Package)
    • Fixed- or Adjustable-Output Voltages:
      5 V/ADJ, 3.3 V/ADJ, and 3 V/ADJ
    • Low-Voltage Error Signal on Falling Output
    • Shutdown Capability
    • Remote Sense Capability for Optimal Output
      Regulation and Accuracy
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Description

The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.

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Technical documentation

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Type Title Date
* Datasheet LP295x Adjustable Micropower Voltage Regulators with Shutdown datasheet (Rev. I) Nov. 12, 2014
Application notes ESR, Stability, and the LDO Regulator (Rev. A) Jan. 07, 2020
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Application notes LDO Noise Demystified (Rev. A) Aug. 09, 2017
Application notes LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Application notes AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) Apr. 24, 2013
Application notes 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) Jun. 14, 2010
Application notes 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) Jun. 14, 2010
Application notes Packaging Limits Range of Linear Regulators May 08, 2010
Application notes Simple Power Solution Using LDOs for the DM365 (Rev. A) Sep. 11, 2009
Application notes Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) Jun. 04, 2008
Application notes Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) Oct. 13, 2006
Application notes Understanding LDO Dropout May 09, 2005
Application notes Extending the Input Voltage Range of an LDO Regulator Aug. 16, 2002
Application notes Understanding the Terms and Definitions of LDO Voltage Regulators Oct. 21, 1999
Application notes Technical Review of Low Dropout Voltage Regulator Operation And Performance Aug. 30, 1999
Application notes Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range Jun. 11, 1999

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SLVM953.ZIP (22 KB) - PSpice Model

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Package Pins Download
TO-92 (LP) 3 View options

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