TPS40422RHAR Equivalent & Substitute Parts

Part Overview

The TPS40422RHAR is a buck regulator positive output step-down PMBus DC-DC controller IC manufactured by Texas Instruments in a 40-VQFN (6x6) package. This active product functions as a transistor driver for two-phase buck topology applications with PMBus serial interface control. The device operates across a 4.5V to 20V supply voltage range with switching frequencies from 100kHz to 1MHz, incorporating synchronous rectification and clock synchronization capabilities. Finding equivalent substitute parts may be necessary due to inventory constraints, packaging format requirements, or specific application needs while maintaining electrical and mechanical compatibility.

Substiute Parts

TPS40422RHAR

Texas InstrumentsIn Stock: 18504TPS40422RHAR Datasheet

Current PartRFQ

TPS40422RHAT

Texas InstrumentsIn Stock: 6654TPS40422RHAT Datasheet

Parametric EquivalentRFQ

TPS40425RHAT

Texas InstrumentsIn Stock: 2220TPS40425RHAT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS40422RHAR are determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Identical output type (Transistor Driver)
• Identical topology (Buck, Step-Down)
• Identical number of outputs and phases (2 Outputs, 2 Phases)
• Overlapping or identical supply voltage range (4.5V ~ 20V minimum)
• Compatible switching frequency range (100kHz ~ 1MHz minimum coverage)
• Identical synchronous rectifier capability (Yes)
• Identical clock synchronization (Yes)
• Identical serial interface (PMBus)
• Identical control features (Frequency Control, Power Good)
• Identical operating temperature range (-40°C ~ 125°C)

Mechanical & Packaging Compatibility:

• Identical package type (40-VFQFN Exposed Pad)
• Identical mounting type (Surface Mount)
• Identical supplier device package (40-VQFN 6x6)

Compliance & Regulatory:

• ROHS3 Compliant
• Identical MSL rating (3, 168 Hours)
• REACH Unaffected status
• EAR99 ECCN classification

Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) does not affect electrical or mechanical substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

TPS40422RHAT is a direct parametric equivalent to TPS40422RHAR. Both devices share identical electrical specifications, control features, and package configuration. The primary distinction is packaging format: TPS40422RHAT is supplied in Cut Tape and Digi-Reel format, while TPS40422RHAR is supplied in Tape & Reel format. Selection between these two should be based on procurement and assembly line requirements. Both maintain active product status and full ROHS3 compliance.

TPS40425RHAT is a parametric equivalent with extended switching frequency capability (200kHz ~ 1.5MHz versus 100kHz ~ 1MHz) and includes Phase Control as an additional control feature. This device is suitable for applications requiring higher switching frequency operation or phase management functionality. The TPS40425RHAT maintains identical supply voltage range, package configuration, and compliance certifications. Selection of TPS40425RHAT should be based on application requirements for extended frequency range or phase control capability.

All three devices are manufactured by Texas Instruments, maintain active product status, and comply with ROHS3 and REACH requirements. Selection among these substitutes should be driven by packaging format availability, switching frequency requirements, and control feature needs specific to the application.

Frequently Asked Questions (FAQ)

Q: Can TPS40422RHAT be used as a direct replacement for TPS40422RHAR?

A: Yes. TPS40422RHAT is a parametric equivalent with identical electrical specifications, control features, package type, and compliance ratings. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Electrical and mechanical compatibility is complete.

Q: What is the difference between TPS40425RHAT and TPS40422RHAR?

A: TPS40425RHAT has an extended switching frequency range (200kHz ~ 1.5MHz versus 100kHz ~ 1MHz) and includes Phase Control as an additional control feature. All other electrical parameters, package configuration, and compliance ratings are identical. Selection depends on whether the application requires higher switching frequency operation or phase management capability.

Q: Are all three parts pin-compatible?

A: Yes. All three devices use the identical 40-VFQFN Exposed Pad package (40-VQFN 6x6) with surface mount configuration. Pin compatibility is complete.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape & Digi-Reel packaging formats do not affect electrical performance or functionality. The difference is in supply and handling format only.

Q: Are all substitute parts currently in active production?

A: Yes. TPS40422RHAR, TPS40422RHAT, and TPS40425RHAT all maintain active product status with Texas Instruments.

Q: Do all parts meet the same compliance requirements?

A: Yes. All three devices are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry identical MSL ratings (3, 168 Hours).

Q: Which part should I select if I need higher switching frequency capability?

A: TPS40425RHAT supports switching frequencies up to 1.5MHz compared to 1MHz for the TPS40422 variants. Selection should be based on application frequency requirements.