TPS40422RHAT Equivalent & Substitute Parts

Part Overview

The TPS40422RHAT is a buck regulator positive output step-down PMBus DC-DC controller IC manufactured by Texas Instruments in a 40-VQFN (6x6) package. This power management IC functions as a transistor driver for step-down topology applications with dual output phases and PMBus serial interface control. The part is currently in active production status with 6550 units available in cut tape packaging. Alternative part numbers are necessary when specific packaging formats, inventory availability, or minor functional enhancements are required for production schedules or system requirements.

Substiute Parts

TPS40422RHAT

Texas InstrumentsIn Stock: 6654TPS40422RHAT Datasheet

Current PartRFQ

TPS40422RHAR

Texas InstrumentsIn Stock: 18504TPS40422RHAR Datasheet

Parametric EquivalentRFQ

TPS40425RHAT

Texas InstrumentsIn Stock: 2220TPS40425RHAT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS40422RHAT are determined by strict equivalence in the following core parameters:

Mandatory Equivalence Parameters:

• Manufacturer: Texas Instruments
• Package Type: 40-VQFN (6x6) Exposed Pad
• Output Type: Transistor Driver
• Function: Step-Down
• Output Configuration: Positive
• Topology: Buck
• Number of Outputs: 2
• Output Phases: 2
• Voltage Supply Range: 4.5V ~ 20V
• Synchronous Rectifier: Yes
• Clock Sync: Yes
• Serial Interface: PMBus
• Operating Temperature Range: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• MSL Rating: 3 (168 Hours)

Variable Parameters (Allowed Differences):

• Packaging format (Cut Tape vs. Tape & Reel)
• Switching frequency range (within compatible operational bounds)
• Control features (additional features permitted)
• Base product number (related product lines)
• Inventory availability

The TPS40422RHAR and TPS40425RHAT meet these substitution criteria with variations in packaging and switching frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status with full ROHS3 compliance and identical MSL ratings. Selection between TPS40422RHAT, TPS40422RHAR, and TPS40425RHAT is determined by packaging requirements and operational frequency specifications.

TPS40422RHAT is specified for applications requiring cut tape packaging format with standard switching frequency operation between 100kHz and 1MHz.

TPS40422RHAR provides identical electrical and functional specifications to the TPS40422RHAT with tape and reel packaging, suitable for high-volume automated assembly processes. This variant offers the highest current inventory availability at 18488 units.

TPS40425RHAT extends the switching frequency range to 200kHz ~ 1.5MHz and adds phase control capability to the standard control feature set. This variant is appropriate for applications requiring higher frequency operation or enhanced phase management. Tape and reel packaging is standard for this part number.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are electrically and functionally identical. The difference is packaging format: TPS40422RHAT is supplied in cut tape while TPS40422RHAR is supplied in tape and reel. Both maintain the same 40-VQFN (6x6) package footprint, pinout, and electrical specifications. Selection depends on assembly process requirements.

Q: What is the primary difference between TPS40425RHAT and TPS40422RHAT?

A: The TPS40425RHAT supports an extended switching frequency range of 200kHz ~ 1.5MHz compared to the TPS40422RHAT range of 100kHz ~ 1MHz. Additionally, TPS40425RHAT includes phase control as a control feature, whereas TPS40422RHAT provides frequency control and power good functions. Both maintain identical package type, supply voltage range, and operating temperature specifications.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the identical 40-VQFN (6x6) Exposed Pad package with the same pinout and footprint. PCB layout and schematic connections remain unchanged across all three part numbers.

Q: What packaging format should be selected for high-volume production?

A: Tape and reel packaging (TPS40422RHAR or TPS40425RHAT) is standard for high-volume automated assembly. Cut tape packaging (TPS40422RHAT) is suitable for lower-volume or manual assembly processes.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts maintain identical RoHS3 compliance status, MSL rating of 3 (168 Hours), REACH unaffected status, and ECCN/HTSUS classifications.

Q: Which part should be selected for applications requiring higher switching frequencies?

A: TPS40425RHAT supports switching frequencies up to 1.5MHz, compared to 1MHz maximum for TPS40422RHAT and TPS40422RHAR. Selection of TPS40425RHAT is appropriate when the application requires operation in the 1MHz to 1.5MHz frequency range.