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

LP2981-N

AKTIV

Low-Dropout-Spannungsregler, 100 mA, 16 V, mit Aktivierung

Eine neuere Version dieses Produkts ist verfügbar

Dieses Produkt ist weiterhin für Bestandskunden erhältlich. Neue Designs sollten ein alternatives Produkt erwägen.
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)

Produktdetails

Output options Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 16 Vin (min) (V) 2.7 Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 176 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 41 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) 2.7 Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 Iq (typ) (mA) 0.065 Thermal resistance θJA (°C/W) 176 Rating Catalog Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR at 100 KHz (dB) 41 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 (V IN) Range:
    • Legacy chip: 2.1 V to 16 V
    • New chip: 2.5 V to 16 V
  • Output Voltage (V OUT) Range: 1.2 V to 5.0 V
  • Output Voltage (V OUT) 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 (V OUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100 mA
  • Low I Q (new chip): 69 µA at I LOAD = 0 mA
  • Low I Q (new chip): 620 µA at I LOAD = 100 mA
  • Shutdown current over temperature:
    • < 1 µA (legacy chip)
    • ≤ 1.75 µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75 dB at 1 kHz, 45 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)
  • Input Voltage (V IN) Range:
    • Legacy chip: 2.1 V to 16 V
    • New chip: 2.5 V to 16 V
  • Output Voltage (V OUT) Range: 1.2 V to 5.0 V
  • Output Voltage (V OUT) 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 (V OUT) accuracy over load, and temperature: ±1% (new chip)
  • Output current: Up to 100 mA
  • Low I Q (new chip): 69 µA at I LOAD = 0 mA
  • Low I Q (new chip): 620 µA at I LOAD = 100 mA
  • Shutdown current over temperature:
    • < 1 µA (legacy chip)
    • ≤ 1.75 µA (new chip)
  • Output current limiting and thermal protection
  • Stable with 2.2-µF ceramic capacitors (new chip)
  • High PSRR (new chip):
    • 75 dB at 1 kHz, 45 dB at 1 MHz
  • Operating junction temperature: –40°C to +125°C
  • Package: 5-pin SOT-23 (DBV)

The LP2981-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981-N supports an output range of 1.2 V to 5.0 V (new chip).

Additionally, the LP2981-N (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 75 dB at 1 kHz and 45 dB at 1 MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current-limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

The LP2981-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5 V to 16 V (for new chip only) and up to 100 mA of load current. The LP2981-N supports an output range of 1.2 V to 5.0 V (new chip).

Additionally, the LP2981-N (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 75 dB at 1 kHz and 45 dB at 1 MHz to help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current-limit protection reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are included.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LP2981-N 100-mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. O) PDF | HTML 06 Dez 2023
Application note AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) 25 Apr 2013
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 23 Apr 2013

Design und Entwicklung

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