Datasheet Texas Instruments LP2981A-33

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Application Notes

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  Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A)
  PDF, 509 Kb, Revision: A, File published: Jun 4, 2008
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  3.6V - 5.5V Input LDO Reference Design for MSP430 (Rev. A)
  PDF, 110 Kb, Revision: A, File published: Jun 14, 2010
  This reference design is presented to help application designers and others who are trying to use the MSP430 in a system with an input voltage in the range of 3.6 V to 5.5 V and who are also interested in using an easy-to-use low-dropout linear regulator (LDO) for a simple design but may not be as concerned about maintaining the highest possible efficiency or longest battery life.
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  LDO PSRR Measurement Simplified (Rev. A)
  PDF, 131 Kb, Revision: A, File published: Aug 9, 2017
  This applicationreportexplainsdifferentmethodsof measuringthe PowerSupplyRejectionRatio(PSRR)of a Low-Dropout(LDO)regulatorand includesthe prosand consof thesemeasuringmethods
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  Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range
  PDF, 41 Kb, File published: Jun 11, 1999
  The TPS76301 low-dropout (LDO) adjustable linear regulator generates a regulated 1-V output from an input voltage ranging from 3 V to 6 V. The application circuit is based on the application detailed in the TPS76301 data sheet (TI Literature number SLVS181A Figure 21) except for the auxiliary circuit which is shown here in Figure 1.
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  ESR Stability and the LDO Regulator
  PDF, 83 Kb, File published: May 7, 2002
  Choosing an output capacitor for LDO regulators with PNP or PMOS pass element can be difficult to specific ESR requirements. This application note explains why higher ESR capacitors are necessary how to chose them and how to determine whether or not the regulator is stable.
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  LDO Noise Demystified (Rev. A)
  PDF, 785 Kb, Revision: A, File published: Aug 9, 2017
  Thisapplicationreportexplainsthe differencebetweennoiseand PSRRof an LDO.It also explainsthedifferentwaysnoiseis specifiedin LDOdatasheetsandwhichspecificationshouldbe usedin theapplication.Finallyit explainshow LDOnoiseis reduced.
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  Extending the Input Voltage Range of an LDO Regulator
  PDF, 32 Kb, File published: Aug 16, 2002
  This application report explains how to use a FET to overcome the input voltage limitation of a linear regulator.
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  3.6V - 5.5V Input LDO with Dual-Level Output Reference Design for MSP430 (Rev. A)
  PDF, 199 Kb, Revision: A, File published: Jun 14, 2010
  This reference design is presented to help application designers and others who are trying to use the MSP430 in a system with an input voltage in the range of 3.6 V to 5.5 V and who are also interested in using an easy-to-use low-dropout linear regulator (LDO) for a simple design with extended battery life by putting the MSP430 into a low-power state between operating states.
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  Understanding the Terms and Definitions of LDO Voltage Regulators
  PDF, 197 Kb, File published: Oct 21, 1999
  This report provides an understanding of the terms and definitions of low dropout (LDO) voltage regulators and describes fundamental concepts including dropout voltage quiescent current standby current efficiency transient response line/load regulation power supply rejection output noise voltage accuracy and power dissipation. Each section includes an example to increase the understandab
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  Simple Power Solution Using LDOs for the DM365 (Rev. A)
  PDF, 104 Kb, Revision: A, File published: Sep 11, 2009
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  Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A)
  PDF, 44 Kb, Revision: A, File published: Oct 13, 2006
  With the proper considerations ceramic output capacitors can be used with low dropout regulators (LDO) and DC/DC switching converters that require tantulum output capacitors.
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  Understanding LDO Dropout
  PDF, 52 Kb, File published: May 9, 2005
  Not all low dropout (LDO) linear regulator data sheets provide the voltage dropout information needed for all applications. This application report shows a designer how to use an LDO data sheet's specified dropout performance to determine the dropout voltage at other operating conditions.
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  Technical Review of Low Dropout Voltage Regulator Operation And Performance
  PDF, 284 Kb, File published: Aug 30, 1999
  This application report provides a technical review of low dropout (LDO) voltage regulators and describes fundamental concepts including dropout voltage quiescent current and topologies. The report also includes detailed discussions of load/line regulation efficiency frequency response range of stable ESR and accuracy of LDO voltage regulators.
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  AN-1815 LDOs Ease the Stress of Start-Up (Rev. A)
  PDF, 81 Kb, Revision: A, File published: Apr 24, 2013
  The LP38851/52/53 devices with soft-start provide a reliable way to ensure that start-up into highcapacitive loads is uneventful and stress free.
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  Packaging Limits Range of Linear Regulators
  PDF, 75 Kb, File published: May 8, 2010
  The power limitations of the physical packaging for a linear regulator device can limit the total output current or the input-to-output voltage differential. This inherent limitation is not always apparent from the product data sheet and must be evaluated during the design phase. This application note shows how the package can limit the operating envelope of a linear regulator.

Manufacturer's Classification

• Semiconductors> Power Management> Linear Regulator (LDO)> Single Channel LDO