TPS79425DCQ Equivalent & Substitute Parts

Part Overview

The TPS79425DCQ is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output applications with 250mA current capacity in SOT-223-6 surface mount packaging. This device is classified as Last Time Buy, indicating end-of-life status. Finding equivalent substitute parts is necessary to ensure continued design support, maintain supply chain flexibility, and access components with active production status and improved availability.

Substiute Parts

TPS79425DCQ

Texas InstrumentsIn Stock: 2136TPS79425DCQ Datasheet

Current PartRFQ

TPS7A2025PDBVR

Texas InstrumentsIn Stock: 27298TPS7A2025PDBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS79425DCQ is determined by the following critical parameters:

• Fixed output voltage of 2.5V
• Positive output configuration
• Single regulator output
• Surface mount technology
• Operating temperature range of -40°C to 125°C
• Protection features including over current and over temperature protection
• ROHS3 compliance and REACH unaffected status

The TPS7A2025PDBVR qualifies as a direct substitute based on matching all critical electrical and functional parameters. While package geometry differs (SOT-23-5 versus SOT-223-6), both are surface mount packages suitable for PCB integration with appropriate footprint redesign. The substitute part offers enhanced specifications including higher output current capacity (300mA versus 250mA), lower quiescent current (15µA versus 220µA), and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TPS7A2025PDBVR is the qualified substitute for the TPS79425DCQ based on the following engineering criteria:

• Both devices maintain identical fixed output voltage (2.5V) and positive output configuration
• Both comply with ROHS3 and REACH requirements
• The substitute part carries Active product status, ensuring long-term availability and supply chain continuity
• The substitute offers superior performance characteristics: reduced quiescent current (15µA vs 220µA), higher maximum output current (300mA vs 250mA), and extended PSRR bandwidth (1MHz vs 100kHz)
• Package transition from SOT-223-6 to SOT-23-5 requires PCB footprint modification but maintains surface mount compatibility
• The substitute part features improved moisture sensitivity level (MSL 1 vs MSL 2), providing superior shelf life and handling flexibility

Selection of the TPS7A2025PDBVR is appropriate for new designs and end-of-life replacement scenarios where PCB redesign is feasible.

Frequently Asked Questions (FAQ)

Q: Can the TPS7A2025PDBVR directly replace the TPS79425DCQ without PCB modifications?

A: The TPS7A2025PDBVR provides electrical equivalence but requires PCB footprint redesign due to package differences. The TPS79425DCQ uses SOT-223-6 packaging while the substitute uses SOT-23-5 (SC-74A). Pin configurations differ, necessitating layout changes.

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

A: The substitute part offers three primary improvements: quiescent current reduced from 220µA to 15µA, maximum output current increased from 250mA to 300mA, and PSRR bandwidth extended from 100kHz to 1MHz. Output voltage and operating temperature range remain identical.

Q: Why is the TPS79425DCQ marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line. The TPS7A2025PDBVR represents the active replacement within the TPS7A series, offering improved specifications and continued manufacturing support.

Q: Are there compliance differences between the two parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. The substitute part features superior moisture sensitivity rating (MSL 1 with unlimited shelf life versus MSL 2 with 1-year shelf life), providing better long-term storage characteristics.

Q: What is the impact of the higher maximum input voltage on the substitute part?

A: The TPS7A2025PDBVR accepts input voltages up to 6V compared to 5.5V for the original part. This provides additional design margin for input supply variations and is fully backward compatible with applications designed for the lower voltage specification.

Q: Should I consider the package change as a significant design constraint?

A: Package transition requires PCB redesign but is not a functional constraint. Both packages are industry-standard surface mount types. The SOT-23-5 package is widely supported by PCB manufacturers and assembly services, making redesign straightforward for most applications.