RT8282BHGSP Equivalent & Substitute Parts

Part Overview

The RT8282BHGSP is a buck switching regulator IC manufactured by Richtek USA Inc., designed for positive adjustable step-down voltage regulation with a 2A output current capability. This component operates across an input voltage range of 4.5V to 23V and provides adjustable output voltage from 0.8V to 20V, making it suitable for various power management applications requiring compact surface-mount solutions.

The RT8282BHGSP is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for design continuity, system maintenance, and procurement planning. Active alternatives with comparable electrical characteristics and package compatibility are available to support ongoing production and field service requirements.

Substiute Parts

RT8282BHGSP

Richtek USA Inc.In Stock: 41074RT8282BHGSP Datasheet

Current PartRFQ

TPS54335ADDA

Texas InstrumentsIn Stock: 2358TPS54335ADDA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT8282BHGSP is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Output Characteristics: Single adjustable output with minimum voltage of 0.8V
• Input Voltage Range: Minimum 4.5V input support; maximum input voltage must meet or exceed 23V
• Output Current: Minimum 2A capability required
• Switching Frequency: 1.2MHz nominal operation
• Synchronous Rectification: Integrated synchronous rectifier required
• Package Compatibility: 8-pin SOIC-based package with exposed pad, 0.154" width (3.90mm)
• Temperature Range: Operating range must support -40°C to 85°C minimum

The TPS54335ADDA meets these substitution criteria across all critical electrical parameters and maintains package-level compatibility within the 8-pin SOIC family.

Parameter Comparison

Engineering Selection Recommendations

The TPS54335ADDA is a qualified substitute for the obsolete RT8282BHGSP based on the following engineering criteria:

Product Status & Availability: The RT8282BHGSP is obsolete, while the TPS54335ADDA is active and maintains current production inventory (2300 pcs in stock). This ensures long-term availability and supply chain continuity.

Electrical Compatibility: The TPS54335ADDA meets or exceeds all critical electrical specifications of the original part. Input voltage range (4.5V to 28V), output voltage range (0.8V to 24V), and switching frequency (50kHz to 1.5MHz) all encompass the original operating parameters. The substitute provides 3A output current versus the original 2A, offering design margin for thermal and load considerations.

Package & Mechanical Compatibility: Both parts utilize 8-pin SOIC packages with 0.154" (3.90mm) width and exposed pad configurations. The TPS54335ADDA (8-PowerSOIC) maintains pin-compatible footprints with the RT8282BHGSP (8-SOIC), enabling direct PCB layout substitution without redesign.

Compliance & Certifications: Both parts carry REACH Unaffected and EAR99 ECCN classifications. The TPS54335ADDA is RoHS3 compliant with MSL 2 rating, providing improved moisture handling compared to the original MSL 3 specification.

Temperature Performance: The TPS54335ADDA supports extended junction temperature operation (-40°C to 150°C) compared to the original ambient temperature range (-40°C to 85°C), enabling deployment in higher thermal environments.

Frequently Asked Questions (FAQ)

Q: Can the TPS54335ADDA directly replace the RT8282BHGSP without PCB modifications?

A: Yes. Both parts share 8-pin SOIC package geometry with 0.154" width and exposed pad configurations. Pin assignments are compatible, allowing direct footprint substitution. However, verify final application performance through standard design validation procedures.

Q: What are the key differences between these parts?

A: The TPS54335ADDA provides higher output current (3A vs. 2A), extended input voltage support (28V vs. 23V), higher maximum output voltage (24V vs. 20V), and improved temperature range (-40°C to 150°C vs. -40°C to 85°C). These represent design improvements rather than functional deviations.

Q: Are there any thermal or layout considerations when substituting?

A: The TPS54335ADDA's higher current capability and extended temperature range may require thermal management evaluation in existing designs. Verify that PCB thermal design (copper area, via placement) remains adequate for the application's power dissipation profile.

Q: What is the switching frequency relationship between these parts?

A: The RT8282BHGSP operates at a fixed 1.2MHz switching frequency. The TPS54335ADDA supports a programmable range of 50kHz to 1.5MHz, which encompasses the original frequency. Confirm that frequency selection in the substitute design matches the original application requirements.

Q: Are both parts RoHS compliant?

A: The RT8282BHGSP status is not specified in the provided data. The TPS54335ADDA is RoHS3 compliant, meeting current environmental regulations for new designs and procurement.

Q: What is the moisture sensitivity difference?

A: The RT8282BHGSP carries MSL 3 (168 hours), while the TPS54335ADDA carries MSL 2 (1 year). MSL 2 provides extended shelf life and reduced moisture-related failures during storage and assembly processes.