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

LP2981-N

AKTIV

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

Produktdetails

Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.7 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 176 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.7 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.5 Fixed output options (V) 2.5, 3, 3.3, 3.6, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 176 Load capacitance (min) (µF) 2.2 Regulated outputs (#) 1 Accuracy (%) 2 Dropout voltage (Vdo) (typ) (mV) 200 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm)
  • Input voltage (VIN) range:
    • Legacy chip: 2.1V 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: 2.1V 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-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981-N supports an output range of 1.2V to 5.0V (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 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-N is a fixed-output, low-dropout (LDO) voltage regulator supporting an input voltage range from 2.5V to 16V (for new chip only) and up to 100mA of load current. The LP2981-N supports an output range of 1.2V to 5.0V (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 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.

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LP2981-N 100mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. P) PDF | HTML 27.02.2025
Anwendungshinweis AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B) 25.04.2013
Anwendungshinweis AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 23.04.2013

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