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Name: LD2981ABU33TR
Brand: STMicroelectronics
SKU: LD2981ABU33TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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STMicroelectronics LD2981ABU33TR

Part No.:: LD2981ABU33TR

Manufacturer:: STMicroelectronics

Package:: TO-243AA

Datasheet:: LD2981ABU33TR.pdf

Description:: IC REG LINEAR 3.3V 100MA SOT89-3

In Stock:: 11966

Quantity:: Add To Cart

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LD2981ABU33TR Specifications

Package/Case:
TO-243AA
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
OutputConfiguration:
Positive
OutputType:
Fixed
NumberofRegulators:
1
Voltage-Input(Max):
16V
Voltage-Output(Min/Fixed):
3.3V
Voltage-Output(Max):
-
VoltageDropout(Max):
0.375V @ 100mA
Current-Output:
100mA
Current-Quiescent(Iq):
150 µA
Current-Supply(Max):
2.6 mA
PSRR:
63dB (1kHz)
ControlFeatures:
-
ProtectionFeatures:
Over Current, Over Temperature
OperatingTemperature:
-40°C ~ 125°C
MountingType:
Surface Mount

LD2981ABU33TR this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including LD2981ABU33TR price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for LD2981ABU33TR to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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LD2981ABU33TR information

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LD2981ABU33TR Typical application Circuitry

LD2981ABU33TR

The LD2981ABU33TR is part of the LD2981 series, renowned for its low-dropout (LDO) voltage regulators. These devices are designed to provide precise voltage regulation with a minimal difference between the input and output voltages, making them ideal for battery-operated devices, portable electronics, and applications where power efficiency is crucial. The LD2981ABU33TR, in particular, is tailored to deliver a fixed output voltage of 3.3V, suitable for powering low-voltage digital circuits and microcontrollers.

1. Low-Dropout Voltage Regulator Design: The essence of the LD2981ABU33TR's functionality lies in its ability to maintain a stable 3.3V output even when the input voltage is very close to the output voltage, minimizing power loss and enhancing energy efficiency. This LDO regulator is optimized for applications that require a stable power supply with minimal voltage overhead.

2. Pin Configuration for Efficient Circuit Integration: The LD2981ABU33TR is designed with a straightforward pin layout typically consisting of three main pins: the Input (Vin), Output (Vout), and Ground (GND). Vin is connected to the unregulated input power source, Vout provides the regulated 3.3V output to the load, and GND is connected to the system ground, offering a reference point and completing the circuit.

3. Power Supply and Load Connection: To achieve optimal performance from the LD2981ABU33TR, it's crucial to provide a stable input voltage that is slightly higher than the desired 3.3V output, taking into account the regulator's dropout voltage. The output should be connected to the load that requires regulation, ensuring that the current demand does not exceed the regulator's specified maximum output current.

4. Bypass Capacitors for Stability: To enhance the stability and noise performance of the LD2981ABU33TR, it is recommended to use bypass capacitors at the input and output. A capacitor connected close to the Vin pin helps filter input noise and supply variations, while a capacitor at the Vout pin improves transient response and output noise characteristics. The specific values for these capacitors can vary based on the application but are typically in the range of 1µF to 10µF.

5. Thermal Considerations for Reliable Operation: The LD2981ABU33TR, like all voltage regulators, can dissipate heat depending on the voltage drop and the current it supplies. Ensuring adequate thermal management, such as providing sufficient PCB copper area for heat spreading or using external heat sinks in high-power applications, is essential to prevent overheating and ensure reliable operation.

6. Application-Specific Design Considerations: The LD2981ABU33TR's versatility makes it suitable for a wide array of applications, from powering microcontrollers and digital logic to providing a stable voltage for RF circuits. Depending on the specific application, considerations such as the need for additional filtering, protection diodes for reverse voltage protection, or isolation techniques might be necessary to tailor the regulator's performance to the particular requirements of the system.

In summary, the LD2981ABU33TR is a fixed-output LDO voltage regulator from the LD2981 series, designed to provide stable and efficient power regulation with a minimal voltage dropout. Implementing this device involves understanding its pin functions, ensuring a stable input voltage, managing the load connection, utilizing bypass capacitors for enhanced performance, addressing thermal management, and considering application-specific requirements. By following these guidelines, engineers can effectively utilize the LD2981ABU33TR to enhance the power efficiency and reliability of a wide range of electronic systems.

LD2981ABU33TR FAQ

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6. What is the process for return or replacement of LD2981ABU33TR?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LD2981ABU33TR we delivered, we will accept the replacement or return of the LD2981ABU33TR only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LD2981ABU33TR.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations