myMectronic
myMectronic

A Premier B2B Part Search

STMICROELECTRONICS LD2981ABM33TR Low Noise Voltage Regulator

The LD2981 is a low-noise, ultra low-dropout voltage regulator designed for low power, battery-powered applications. It has a guaranteed output current up to 100 mA, with an output voltage of 3.3 V, and features a small package including SOT23-5L and SOT-89. The device offers very low quiescent current, fast dynamic response, and a logic-controlled enable/disable function, making it suitable for portable electronics like smartphones, laptops, PDAs, and digital cameras. Its internal current and thermal limits ensure reliable operation over a wide temperature range from -40°C to 125°C.

Authorized Distributors
Source:Newark
Part No:LD2981ABM33TR
Stock:43
Inv Date:06-11-2026
Price: Unit price: $0.752
Buy/RFQ:
Source:DigiKey
Part No:LD2981ABM33TR
Stock:18026
Inv Date:06-11-2026
Price: Unit price: $0.73
Buy/RFQ:
Part No:LD2981ABM33TR
Stock:2977
Inv Date:06-12-2026
Price: Unit price: $0.73
Buy/RFQ:
Part No:LD2981ABM33TR
Stock:0
Inv Date:06-11-2026
Price: Unit price: $0.72
Buy/RFQ:
Part No:LD2981ABM33TR
Stock:0
Inv Date:06-11-2026
Price: Unit price: $0.295
Buy/RFQ:
Source:Arrow EU
Part No:LD2981ABM33TR
Stock:15000
Inv Date:06-12-2026
Price: N/A
Buy/RFQ:
Part No:LD2981ABM33TR
Stock:12000
Inv Date:06-12-2026
Price: N/A
Buy/RFQ:

STMICROELECTRONICS LD2981ABM33TR Low Noise Voltage Regulator Specifications:

  • Output Voltage: 3.3 V
  • Guaranteed Output Current: 100 mA
  • Dropout Voltage: 0.17 V typ. at 100 mA load
  • Quiescent Current: 80 μA typ. at no load in on mode
  • Shutdown Quiescent Current: less than 1 μA
  • Input Voltage Range: 25 V maximum, with Dropout Voltage calculated based on minimum input voltage for stable operation
  • Temperature Range: -40°C to 125°C
  • Package Types: SOT23-5L and SOT-89
  • Output Noise Voltage: 160 μV RMS
  • Fast transient response to line and load changes
  • Internal current and thermal limit protections
  • Logic-controlled electronic shutdown via inhibit pin
  • Uses ceramic or tantalum capacitors compatible with low ESR for stability

Buy the STMicroelectronics Series LD2981 Low Noise Voltage Regulator: LD2981ABM33TR

Order the STMicroelectronics LD2981ABM33TR online today and enhance your electronic projects with this low noise, ultra low-dropout voltage regulator. Its compact SOT23-5L package, guaranteed 100 mA output current, and low quiescent current make it ideal for battery-powered and portable applications such as smartphones, PDAs, and digital cameras. With excellent line and load transient response, internal thermal and current limits, and low output noise voltage of 160 μV RMS, you will experience reliable performance and power efficiency in every deployment. Shop now for quick delivery and trusted quality.

Buy STMicroelectronics LD2981ABM33TR now and experience unmatched reliability, ultra low noise, compact design, and exceptional efficiency for your portable device needs.

Frequently Asked Questions

Where can I buy STMICROELECTRONICS LD2981ABM33TR?

You can click on the BUY or RFQ button to purchase LD2981ABM33TR from an authorized STMICROELECTRONICS distributor.

How do I troubleshoot issues or seek technical support for part LD2981ABM33TR?

You can download the LD2981ABM33TR datasheet or visit the STMICROELECTRONICS website for support.

Who is the manufacturer of LD2981ABM33TR?

STMICROELECTRONICS

STMICROELECTRONICS Part List

Browse and search other STMICROELECTRONICS parts, locate datasheets and stock

Sponsored by