SN0401093PWPR Equivalent & Substitute Parts

Part Overview

The SN0401093PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive adjustable step-down voltage regulation with 9A output current capability. This device operates across a 4V input range and delivers adjustable output voltage from 0.9V to 3.6V, featuring synchronous rectification and a switching frequency range of 280kHz to 700kHz. The part is currently in Last Time Buy status, making identification of functionally equivalent alternatives necessary for design continuity and long-term supply chain planning.

Substiute Parts

SN0401093PWPR

Texas InstrumentsIn Stock: 1036SN0401093PWPR Datasheet

Current PartRFQ

TPS62871QWRXSRQ1

Texas InstrumentsIn Stock: 2703TPS62871QWRXSRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS62871QWRXSRQ1 qualifies as a functional substitute for the SN0401093PWPR based on the following critical parameters:

Core Functional Alignment:

• Both devices are buck switching regulators with positive adjustable output configuration
• Both deliver 9A output current capability
• Both feature synchronous rectification
• Both are manufactured by Texas Instruments
• Both are surface mount devices with RoHS3 compliance

Substitution Criteria: The TPS62871QWRXSRQ1 maintains functional equivalence through matching output current (9A), topology (buck converter), and output configuration (positive adjustable). The substitute part extends the input voltage range (2.7V to 6V versus 4V fixed) and output voltage range (0.4V to 3.35V versus 0.9V to 3.6V), providing broader operational flexibility. The substitute operates at higher switching frequencies (1.5MHz to 3MHz) and supports an extended temperature range (-40°C to 125°C), with automotive-grade qualification (AEC-Q100).

Package Consideration: The substitute uses a 16-TFQFN package versus the original 28-PowerTSSOP package, requiring PCB layout redesign but offering reduced footprint and improved thermal performance through exposed pad design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution: The TPS62871QWRXSRQ1 is suitable for applications where the SN0401093PWPR is reaching end-of-life. The substitute maintains 9A output current and adjustable positive output configuration. Both devices are ROHS3 compliant and manufactured by Texas Instruments, ensuring regulatory alignment.

Advantages of TPS62871QWRXSRQ1:

• Active product status ensures long-term availability
• Extended input voltage range (2.7V to 6V) accommodates broader supply conditions
• Higher switching frequency reduces external component size
• Extended operating temperature range (-40°C to 125°C) supports wider environmental conditions
• AEC-Q100 automotive qualification provides additional reliability assurance

Design Considerations: Package transition from 28-PowerTSSOP to 16-TFQFN requires PCB layout modification. The exposed pad on the TFQFN package improves thermal dissipation compared to the PowerTSSOP variant. Output voltage range differences (0.9V to 3.6V versus 0.4V to 3.35V) must be evaluated for specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can TPS62871QWRXSRQ1 directly replace SN0401093PWPR without circuit modification?

A: Functional replacement is possible with circuit redesign. Both devices deliver 9A output current with adjustable positive output and synchronous rectification. However, the package change from 28-PowerTSSOP to 16-TFQFN requires PCB layout modification. Feedback network design may require adjustment due to different output voltage ranges and switching frequency characteristics.

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

A: The primary differences are input voltage range (4V fixed versus 2.7V to 6V variable), output voltage range (0.9V to 3.6V versus 0.4V to 3.35V), and switching frequency (280kHz to 700kHz versus 1.5MHz to 3MHz). The substitute supports extended operating temperature to 125°C and includes automotive-grade qualification.

Q: Is the package change from 28-PowerTSSOP to 16-TFQFN significant?

A: Yes. The 16-TFQFN package is substantially smaller with an exposed pad for improved thermal performance. PCB layout redesign is required, including trace routing, thermal via placement, and component placement around the regulator. The wettable flank design on the TFQFN improves solder joint inspection capability.

Q: Are both parts RoHS compliant?

A: Yes. Both SN0401093PWPR and TPS62871QWRXSRQ1 are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements for industrial and commercial applications.

Q: Why is the substitute part in Active status while the original is Last Time Buy?

A: The SN0401093PWPR has reached end-of-life in Texas Instruments' product portfolio. The TPS62871QWRXSRQ1 represents the active successor in the SWIFT™ regulator family, offering enhanced specifications and extended availability for new designs and production continuity.