RT8282ALGSP Equivalent & Substitute Parts

Part Overview

The RT8282ALGSP is a buck switching regulator IC manufactured by Richtek USA Inc., designed for positive adjustable step-down voltage regulation with a 2A output capacity. This component operates across an input voltage range of 4.5V to 23V and provides adjustable output from 0.8V to 20V, making it suitable for various power management applications requiring compact surface-mount solutions.

The RT8282ALGSP is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts is essential for design continuity, system maintenance, and procurement planning. The TPS54335ADDA from Texas Instruments serves as a direct functional equivalent with enhanced specifications and active product status.

Substiute Parts

RT8282ALGSP

Richtek USA Inc.In Stock: 803RT8282ALGSP Datasheet

Current PartRFQ

TPS54335ADDA

Texas InstrumentsIn Stock: 2358TPS54335ADDA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the RT8282ALGSP with the TPS54335ADDA is based on alignment of the following critical electrical and mechanical parameters:

• Topology & Function: Both devices implement buck (step-down) switching regulator topology with positive adjustable output configuration
• Output Characteristics: Both support single adjustable output with 0.8V minimum output voltage
• Input Voltage Range: Both accept 4.5V minimum input; TPS54335ADDA extends maximum input to 28V (versus 23V for RT8282ALGSP)
• Output Voltage Range: Both support adjustable output up to 20V or higher (TPS54335ADDA to 24V)
• Synchronous Rectification: Both incorporate synchronous rectifier functionality for improved efficiency
• Package Compatibility: Both use 8-pin SOIC-based packages with 0.154" (3.90mm) width, enabling direct PCB footprint compatibility
• Surface Mount: Both are surface-mount devices suitable for automated assembly

The TPS54335ADDA provides enhanced current capacity (3A versus 2A) and extended operating temperature range (-40°C to 150°C junction temperature versus -40°C to 85°C ambient), making it suitable for applications requiring higher output current or operation in elevated temperature environments.

Parameter Comparison

Engineering Selection Recommendations

The TPS54335ADDA is the appropriate substitute for the obsolete RT8282ALGSP based on the following engineering criteria:

Product Status & Availability: The RT8282ALGSP is obsolete, whereas the TPS54335ADDA maintains active product status with established supply chains and manufacturing continuity.

Regulatory Compliance: The TPS54335ADDA is ROHS3 compliant, meeting current environmental and regulatory requirements. Both devices are REACH unaffected and carry EAR99 ECCN classification.

Electrical Compatibility: The TPS54335ADDA maintains full compatibility with the RT8282ALGSP across all critical electrical parameters: identical input minimum (4.5V), identical output minimum (0.8V), and identical topology and output configuration. The extended input maximum (28V versus 23V) and output maximum (24V versus 20V) provide design margin without requiring circuit modification.

Thermal Performance: The TPS54335ADDA supports extended junction temperature operation (-40°C to 150°C) compared to the RT8282ALGSP ambient temperature range (-40°C to 85°C), enabling deployment in higher-temperature environments.

Current Capacity: The TPS54335ADDA provides 3A output current versus 2A for the RT8282ALGSP, offering increased headroom for existing 2A designs and enabling higher-power applications.

Package Compatibility: Both devices use 8-pin SOIC packages with identical 0.154" (3.90mm) width, ensuring direct PCB footprint compatibility without layout redesign.

Moisture Sensitivity: The TPS54335ADDA carries MSL 2 (1 Year) versus MSL 3 (168 Hours) for the RT8282ALGSP, reducing moisture-related handling constraints during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the TPS54335ADDA directly replace the RT8282ALGSP without circuit modification?

A: Yes. Both devices share identical buck topology, adjustable output configuration, input minimum voltage (4.5V), output minimum voltage (0.8V), and 8-pin SOIC package footprint. The TPS54335ADDA's extended input and output voltage ranges do not require circuit changes for applications operating within the RT8282ALGSP's original specifications.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Product status—RT8282ALGSP is obsolete; TPS54335ADDA is active; (2) Output current—2A versus 3A; (3) Input voltage maximum—23V versus 28V; (4) Output voltage maximum—20V versus 24V; (5) Operating temperature—-40°C to 85°C (ambient) versus -40°C to 150°C (junction); (6) Switching frequency—fixed 340kHz versus programmable 50kHz to 1.5MHz; (7) Regulatory compliance—TPS54335ADDA is ROHS3 compliant.

Q: Are the packages physically identical?

A: Both use 8-pin SOIC packages with 0.154" (3.90mm) width. The RT8282ALGSP uses 8-SOIC with exposed pad; the TPS54335ADDA uses 8-PowerSOIC. Both are compatible with standard 8-SOIC PCB footprints. Verify thermal pad design if maximum thermal performance is required.

Q: What is the impact of the different switching frequencies?

A: The RT8282ALGSP operates at fixed 340kHz, while the TPS54335ADDA supports programmable frequency from 50kHz to 1.5MHz. This provides design flexibility for the TPS54335ADDA but does not prevent substitution. Applications designed for 340kHz operation can configure the TPS54335ADDA to operate at or near this frequency.

Q: Does the higher current rating (3A) of the TPS54335ADDA affect compatibility?

A: No. Higher current rating indicates increased capability, not incompatibility. Applications requiring 2A or less will operate within the TPS54335ADDA's safe operating range. The substitute provides design margin and supports future higher-power variants without component change.

Q: Are there any moisture sensitivity considerations?

A: The TPS54335ADDA carries MSL 2 (1 Year) versus MSL 3 (168 Hours) for the RT8282ALGSP. This represents improved moisture tolerance, reducing handling constraints during storage and assembly. No additional precautions are required.

Q: Is the TPS54335ADDA suitable for high-temperature applications?

A: Yes. The TPS54335ADDA supports junction temperature operation to 150°C, compared to the RT8282ALGSP's 85°C ambient maximum. This enables deployment in elevated-temperature environments where the original part would be unsuitable.