Startseite Energiemanagement Linear- und Low-Dropout-Regler (LDO)

LP2981A

AKTIV

Hochpräziser Low-Dropout-Spannungsregler, 100 mA, 16 V mit Aktivierungsfunktion

alarmBenachrichtigungen Jetzt bestellen

Produktdetails

Output options Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 16 Vin (min) (V) 2.2 Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 2.8, 2.9, 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 205 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Output options Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 16 Vin (min) (V) 2.2 Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 2.8, 2.9, 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 205 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input voltage (VIN) range:
    • Legacy chip: 2.2V to 16V
    • New chip: 2.5V to 16V
  • Output voltage (VOUT) range: 1.2V to 5.0V
  • Output voltage (VOUT) accuracy:
    • ±0.75% for A-grade legacy chip
    • ±1.25% for standard-grade legacy chip
    • ±0.5% for new chip (A-grade and standard grade)
  • Output Voltage (VOUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100mA
  • Low IQ (new chip): 69µA at ILOAD = 0mA
  • Low IQ (new chip): 620µA at ILOAD = 100mA
  • Shutdown current over temperature:
    • < 1µA (legacy chip)
    • ≤ 1.75µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75dB at 1kHz, 45dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • Input voltage (VIN) range:
    • Legacy chip: 2.2V to 16V
    • New chip: 2.5V to 16V
  • Output voltage (VOUT) range: 1.2V to 5.0V
  • Output voltage (VOUT) accuracy:
    • ±0.75% for A-grade legacy chip
    • ±1.25% for standard-grade legacy chip
    • ±0.5% for new chip (A-grade and standard grade)
  • Output Voltage (VOUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100mA
  • Low IQ (new chip): 69µA at ILOAD = 0mA
  • Low IQ (new chip): 620µA at ILOAD = 100mA
  • Shutdown current over temperature:
    • < 1µA (legacy chip)
    • ≤ 1.75µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75dB at 1kHz, 45dB at 1MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2981 and LP2981A (LP2981x) are fixed-output, low-dropout (LDO) voltage regulators supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981x support an output range of 1.2V to 5.0V (new chip).

Additionally, the LP2981x (new chip) has a ±1% output accuracy across load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

In the new chip, wide bandwidth PSRR performance is 75dB at 1kHz and 45dB at 1MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

In the new chip, the internal soft-start mechanism reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2981 and LP2981A (LP2981x) are fixed-output, low-dropout (LDO) voltage regulators supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981x support an output range of 1.2V to 5.0V (new chip).

Additionally, the LP2981x (new chip) has a ±1% output accuracy across load and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.

In the new chip, wide bandwidth PSRR performance is 75dB at 1kHz and 45dB at 1MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

In the new chip, the internal soft-start mechanism reduces inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

Herunterladen Video mit Transkript ansehen Video

Ähnliche Produkte, die für Sie interessant sein könnten

Selbe Funktionalität wie der verglichene Baustein bei gleicher Anschlussbelegung
TPS7A24 AKTIV Low-Dropout-Spannungsregler (LDO), 200 mA, 18 V, extrem niedriger Ruhestrom, mit Aktivierung Ultra-low-IQ (2 µA)

Technische Dokumentation

star =Von TI ausgewählte Top-Empfehlungen für dieses Produkt
Keine Ergebnisse gefunden. Bitte geben Sie einen anderen Begriff ein und versuchen Sie es erneut.
Alle anzeigen 16
Typ Titel Datum
* Data sheet LP2981x 100mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. I) PDF | HTML 11 Feb 2025
Application note LDO Noise Demystified (Rev. B) PDF | HTML 18 Aug 2020
Application note ESR, Stability, and the LDO Regulator (Rev. A) 07 Jan 2020
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 09 Aug 2017
Application note AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 24 Apr 2013
Application note 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) 14 Jun 2010
Application note 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) 14 Jun 2010
Application note Packaging Limits Range of Linear Regulators 08 Mai 2010
Application note Simple Power Solution Using LDOs for the DM365 (Rev. A) 11 Sep 2009
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 04 Jun 2008
Application note Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 13 Okt 2006
Application note Understanding LDO Dropout 09 Mai 2005
Application note Extending the Input Voltage Range of an LDO Regulator 16 Aug 2002
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 21 Okt 1999
Application note Technical Review of Low Dropout Voltage Regulator Operation And Performance 30 Aug 1999
Application brief Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range 11 Jun 1999

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOT-23 (DBV) 5 Ultra Librarian

Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

Empfohlene Produkte können Parameter, Evaluierungsmodule oder Referenzdesigns zu diesem TI-Produkt beinhalten.

Support und Schulungen

TI E2E™-Foren mit technischem Support von TI-Ingenieuren

Inhalte werden ohne Gewähr von TI und der Community bereitgestellt. Sie stellen keine Spezifikationen von TI dar. Siehe Nutzungsbedingungen.

Bei Fragen zu den Themen Qualität, Gehäuse oder Bestellung von TI-Produkten siehe TI-Support. ​​​​​​​​​​​​​​

Videos