TPS40428RHAR Equivalent & Substitute Parts

Part Overview

The TPS40428RHAR is a Buck Regulator Positive Output Step-Down PMBus DC-DC Controller IC manufactured by Texas Instruments in a 40-VQFN (6x6) package. This device functions as a PWM signal output step-down controller with dual output phases and PMBus serial interface capability. The part is currently in active production status with 26,882 units available in new original inventory. Alternative part numbers are necessary when primary inventory is depleted or when supply chain optimization requires sourcing from available stock.

Substiute Parts

TPS40428RHAR

Texas InstrumentsIn Stock: 26892TPS40428RHAR Datasheet

Current PartRFQ

TPS40428RHAT

Texas InstrumentsIn Stock: 1758TPS40428RHAT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS40428RHAT qualifies as a parametric equivalent to the TPS40428RHAR based on identical electrical and mechanical specifications. Substitution is valid when the following criteria are met:

• Identical base product number (TPS40428)
• Matching package designation (40-VQFN 6x6 Exposed Pad)
• Identical voltage supply range (4.5V ~ 20V)
• Identical switching frequency capability (200kHz ~ 1.5MHz)
• Matching output configuration (2 outputs, 2 phases, positive polarity)
• Identical control interface (PMBus with Frequency Control, Phase Control, Power Good)
• Identical operating temperature range (-40°C ~ 125°C)
• Matching compliance certifications (ROHS3, REACH Unaffected, EAR99)
• Identical moisture sensitivity level (MSL 3)

Both parts are manufactured by Texas Instruments and maintain active product status, ensuring long-term availability and consistent quality standards.

Parameter Comparison

Engineering Selection Recommendations

Both the TPS40428RHAR and TPS40428RHAT are suitable for direct substitution in applications requiring a dual-phase buck regulator controller with PMBus interface. Selection between these parts should be based on inventory availability and supply chain requirements.

The TPS40428RHAR maintains higher inventory levels (26,882 units), making it the preferred choice for standard procurement. The TPS40428RHAT serves as a secondary source option with adequate stock (1,678 units) for continued supply assurance.

Both parts carry identical compliance certifications (ROHS3 Compliant, REACH Unaffected, EAR99), ensuring regulatory compliance across all applications. Active product status for both variants confirms ongoing manufacturer support and consistent quality standards.

Frequently Asked Questions (FAQ)

Q: Can TPS40428RHAT replace TPS40428RHAR in existing designs?

A: Yes. Both parts share identical electrical specifications, package dimensions, and control interfaces. Direct substitution is valid without design modifications.

Q: Are there differences in pin configuration between these parts?

A: No. Both parts use the 40-VQFN (6x6) package with exposed pad. Pin assignments and functionality are identical.

Q: Do both parts support the same operating temperature range?

A: Yes. Both parts operate across -40°C to 125°C junction temperature, meeting identical thermal specifications.

Q: What is the significance of the different part number suffixes (RHAR vs RHAT)?

A: The suffix designates the tape and reel packaging configuration. Both are surface mount variants with identical electrical and functional characteristics.

Q: Are moisture sensitivity requirements the same for both parts?

A: Yes. Both parts carry MSL 3 rating with 168-hour floor life, requiring identical handling and storage protocols.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Identical package specifications, pin assignments, and electrical characteristics enable direct PCB-level substitution without layout modifications.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes.