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LD2981ABU33TR The STMicroelectronics LD2981ABU33TR is a linear voltage regulator providing a fixed 3.3V output at 100mA. It features over-current and over-temperature protection.
Mfr Part #:

LD2981ABU33TR

Available from 7 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics LD2981ABU33TR is a linear voltage regulator providing a fixed 3.3V output at 100mA. It features over-current and over-temperature protection.
✓ Total Stock: 114,347 pcs
$ Price Range: $0.28

LD2981ABU33TR Available from 7 distributors

✓ Authorised
✓ Non-Authorised
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LD2981ABU33TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Lead Spacing
Lead Style
Mounting Type
Number of Regulators
Operating Temperature
Output Configuration
Output Type
PSRR
Protection Features
Supplier Device Package
Voltage
Voltage Dropout (Max)
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LD2981ABU33TR Description

Short technical summary and product information.

The STMicroelectronics LD2981ABU33TR is a positive, fixed output linear voltage regulator designed for efficient power management. It delivers a stable 3.3V output voltage with a maximum output current of 100mA.

 

Key electrical specifications include a low quiescent current of 150µA and a supply voltage range up to 16V. The regulator offers protection features such as over-current and over-temperature shutdown, enhancing system reliability. Its PSRR is rated at 63dB at 1kHz, indicating good noise rejection.

 

Packaged in a surface-mount SOT-89-3 (TO-243AA) case, this component is suitable for space-constrained applications. The operating temperature range is from -40°C to +125°C, making it versatile for various environmental conditions.

 

This device is ideal for applications requiring a stable, low-dropout voltage supply with moderate current capabilities.

LD2981ABU33TR Quick Information

Product Type: Voltage Regulator - Linear
Series: LD2981
Canonical Name: STMicroelectronics LD2981ABU33TR Linear Voltage Regulator
Subcategory: Voltage Regulators - Linear

LD2981ABU33TR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

LD2981ABU33TR Estimated Pricing

Qty Low High
1+ $0.28 $0.28

Estimated market price range - modelled values for guidance only, not live distributor offers.

LD2981ABU33TR Features

  • Fixed 3.3V output voltage.
  • 100mA maximum output current.
  • Low 150µA quiescent current.
  • Over current and temperature protection.
  • Surface mount SOT-89-3 package.

LD2981ABU33TR Applications

  • Powering sensitive analog circuits.
  • Battery-powered portable devices.
  • Low-power embedded systems.
  • General voltage regulation needs.

LD2981ABU33TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the output voltage?

3.3V fixed.

What is the maximum output current?

100mA.

What is the package type?

SOT-89-3 (TO-243AA).

What is the operating temperature range?

-40°C to +125°C.

What is the quiescent current?

150µA.

What is the PSRR at 1kHz?

63dB.

What protection features are included?

Over-current and over-temperature protection.

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