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Product details

Parameters

Output options Fixed Output Iout (Max) (A) 0.1 Vin (Max) (V) 30 Vin (Min) (V) 2.3 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) 51 Load capacitance (Min) (µF) 1 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 3 PSRR @ 100 KHz (dB) 51 Dropout voltage (Vdo) (Typ) (mV) 380 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

TO-252 (NDP) 3 40 mm² 7.3 x 6.58 TO-92 (LP) 3 19 mm² 5.2 x 3.68 open-in-new Find other Linear regulators (LDO)

Features

  • Input Voltage Range: 2.3 V to 30 V
  • 5-V, 3-V, and 3.3-V Output Voltage Versions Available
  • High Accuracy Output Voltage
  • Ensured 100-mA 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 (10 mΩ to 6 Ω)
  • LP2951-N Versions Only:
    • Error Flag Warns of Output Dropout
    • Logic-Controlled Electronic Shutdown
    • Output Programmable From 1.24 V to 29 V

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Description

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

Careful design of the LP2950-N/LP2951-N has minimized all contributions to the error budget. This includes a tight initial tolerance (0.5% typical), extremely good load and line regulation (0.05% typical) and a very low output voltage temperature coefficient, making the part useful as a low-power voltage reference.

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 5-V, 3-V, or 3.3-V output (depending on the version), or programmed from 1.24 V to 29 V with an external pair of resistors.

The LP2950-N is available in the surface-mount TO-252 package and in the popular 3-pin TO-92 package for pin-compatibility with older 5-V regulators. The 8-pin LP2951-N is available in plastic, ceramic dual-in-line, WSON, or metal can packages and offers additional system functions.

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Technical documentation

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Type Title Date
* Datasheet LP295x-N Series of Adjustable Micropower Voltage Regulators datasheet (Rev. Q) Dec. 08, 2017
User guides MLTLDO2EVM-037 Evaluation Module User's Guide May 22, 2020
Application notes A Topical Index of TI LDO Application Notes (Rev. F) Jun. 27, 2019
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
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Application notes AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) Apr. 23, 2013
Application notes TO-92 Packing Options / Ordering Instructions (Rev. A) Jun. 23, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
29
Description

The MLTLDO2EVM-037 multipackage low-dropout (LDO) evaluation module (EVM) allows design engineers to evaluate the operation and performance of several common packages of linear regulators for possible use in their own circuit application. This EVM configuration contains a DDA, 3-pin and 5-pin KVU (...)

Features
  • Supports most LDO linear regulators in
    • DDA package
    • 3-pin and 5-pin KVU package
    • DCY package

CAD/CAE symbols

Package Pins Download
TO-252 (NDP) 3 View options
TO-92 (LP) 3 View options

Ordering & quality

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