RT8282BLGSP Equivalent & Substitute Parts

Part Overview

The RT8282BLGSP is a buck switching regulator IC manufactured by Richtek USA Inc., designed for positive adjustable output applications. This device operates as a step-down converter with a single adjustable output, delivering up to 2A of output current across an input voltage range of 4.5V to 23V. The part is packaged in an 8-SOIC (0.154", 3.90mm Width) with exposed pad configuration, suitable for surface mount applications.

The RT8282BLGSP is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

RT8282BLGSP

Richtek USA Inc.In Stock: 822RT8282BLGSP Datasheet

Current PartRFQ

TPS54335ADDA

Texas InstrumentsIn Stock: 2358TPS54335ADDA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT8282BLGSP is determined by the following critical parameters:

• Topology & Function: Buck switching regulator with step-down operation
• Output Configuration: Positive adjustable output with single output channel
• Voltage Specifications: Input range 4.5V to 23V minimum; output adjustable from 0.8V minimum
• Current Rating: Output current capability of 2A or greater
• Switching Frequency: 1.2MHz nominal operation
• Synchronous Rectification: Integrated synchronous rectifier required
• Package Compatibility: 8-pin SOIC or equivalent surface mount package with exposed pad
• Operating Temperature Range: -40°C to 85°C minimum

The TPS54335ADDA from Texas Instruments meets these substitution criteria. It maintains functional equivalence as a buck switching regulator with positive adjustable output, supports the required voltage and current specifications, and is available in a compatible 8-pin surface mount package. The substitute part exceeds the current rating (3A vs. 2A) and input voltage maximum (28V vs. 23V), providing design margin for the application.

Parameter Comparison

Engineering Selection Recommendations

The TPS54335ADDA is a direct functional substitute for the RT8282BLGSP based on the following engineering criteria:

Product Status & Availability: The RT8282BLGSP is obsolete, whereas the TPS54335ADDA is active and in production. This ensures long-term supply chain stability and availability for ongoing production and field support.

Compliance & Certifications: The TPS54335ADDA is ROHS3 compliant, meeting current regulatory requirements for electronic components. Both parts are REACH unaffected and carry EAR99 ECCN classification.

Electrical Compatibility: The substitute part maintains identical minimum input voltage (4.5V), minimum output voltage (0.8V), and switching frequency operation (1.2MHz within the TPS54335ADDA's 50kHz to 1.5MHz range). The higher output current rating (3A vs. 2A) and extended input voltage maximum (28V vs. 23V) provide design margin without requiring circuit modifications.

Package & Thermal Considerations: Both devices use 8-pin surface mount packages with 0.154" width. The TPS54335ADDA's extended operating temperature range (-40°C to 150°C junction temperature vs. -40°C to 85°C ambient) supports broader application environments. The improved moisture sensitivity level (MSL 2 vs. MSL 3) reduces handling and storage constraints.

Frequently Asked Questions (FAQ)

Q: Can the TPS54335ADDA directly replace the RT8282BLGSP without circuit modifications?

A: Yes. Both devices are buck switching regulators with positive adjustable output, identical minimum voltage specifications, and compatible 8-pin surface mount packages. The TPS54335ADDA's higher current rating and extended input voltage range do not require design changes for applications within the RT8282BLGSP's original specifications.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete vs. active), output current capability (2A vs. 3A), maximum input voltage (23V vs. 28V), operating temperature range (85°C vs. 150°C junction), and regulatory compliance (ROHS3 for the substitute). These differences favor the TPS54335ADDA for new designs and ongoing production.

Q: Are the packages physically identical?

A: Both parts use 8-pin surface mount packages with 0.154" (3.90mm) width. The RT8282BLGSP uses 8-SOIC with exposed pad; the TPS54335ADDA uses 8-PowerSOIC. These are mechanically compatible for PCB layout purposes, though the PowerSOIC variant may offer improved thermal performance due to enhanced pad design.

Q: What is the impact of the different switching frequency ranges?

A: The RT8282BLGSP operates at a fixed 1.2MHz switching frequency. The TPS54335ADDA operates across a 50kHz to 1.5MHz range, with 1.2MHz within this specification. For applications designed around the RT8282BLGSP's 1.2MHz operation, the TPS54335ADDA will function identically at this frequency point.

Q: Does the higher moisture sensitivity level (MSL) of the RT8282BLGSP affect substitution?

A: The TPS54335ADDA has a lower MSL rating (2 vs. 3), which is advantageous. MSL 3 requires reflow within 168 hours of moisture exposure; MSL 2 allows one year. The substitute part has less stringent handling requirements, simplifying supply chain and manufacturing processes.

Q: Are there any compliance or certification concerns with substitution?

A: No. The TPS54335ADDA is ROHS3 compliant and REACH unaffected, meeting current regulatory standards. Both parts carry identical ECCN (EAR99) and HTSUS classifications, ensuring no export or import compliance issues.