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LP2981A

ACTIVO

Regulador de voltaje de baja caída de 100 mA, 16 V, con alta precisión y habilitación

Detalles del producto

Rating Catalog Vin (max) (V) 16 Vin (min) (V) 2.2 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 2.8, 2.9, 3, 3.3, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 205 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) 2.2 Iout (max) (A) 0.1 Output options Fixed Output Vout (max) (V) 5 Vout (min) (V) 2.8 Fixed output options (V) 2.8, 2.9, 3, 3.3, 5 Noise (µVrms) 160 PSRR at 100 KHz (dB) 41 Iq (typ) (mA) 0.065 Features Enable Thermal resistance θJA (°C/W) 205 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: 2.2V 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.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LP2981x 100mA, Low-Dropout Regulator in SOT-23 Package datasheet (Rev. I) PDF | HTML 11/02/2025
Nota sobre la aplicación LDO Noise Demystified (Rev. B) PDF | HTML 18/08/2020
Nota sobre la aplicación ESR, Stability, and the LDO Regulator (Rev. A) 7/01/2020
Nota sobre la aplicación LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 9/08/2017
Nota sobre la aplicación AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 24/04/2013
Nota sobre la aplicación 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) 14/06/2010
Nota sobre la aplicación 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) 14/06/2010
Nota sobre la aplicación Packaging Limits Range of Linear Regulators 8/05/2010
Nota sobre la aplicación Simple Power Solution Using LDOs for the DM365 (Rev. A) 11/09/2009
Nota sobre la aplicación Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 4/06/2008
Nota sobre la aplicación Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 13/10/2006
Nota sobre la aplicación Understanding LDO Dropout 9/05/2005
Nota sobre la aplicación Extending the Input Voltage Range of an LDO Regulator 16/08/2002
Nota sobre la aplicación Understanding the Terms and Definitions of LDO Voltage Regulators 21/10/1999
Nota sobre la aplicación Technical Review of Low Dropout Voltage Regulator Operation And Performance 30/08/1999
Application brief Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range 11/06/1999

Diseño y desarrollo

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