XR76115ELTR-F Equivalent & Substitute Parts

Part Overview

The XR76115ELTR-F is a buck switching regulator IC from MaxLinear's Power Blox™ series, designed for positive adjustable step-down voltage regulation with a 15A output current capability. This component operates across an input voltage range of 4.5V to 22V and provides adjustable output voltage from 0.6V to 18V, making it suitable for diverse power management applications requiring high current density in compact form factors.

The XR76115ELTR-F is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems currently utilizing this regulator.

Substiute Parts

XR76115ELTR-F

MaxLinear, Inc.In Stock: 3164XR76115ELTR-F Datasheet

Current PartRFQ

XR76121ELTR-F

MaxLinear, Inc.In Stock: 706XR76121ELTR-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the XR76115ELTR-F is determined by the following critical parameters:

• Input voltage range compatibility (minimum 4.5V, maximum 22V or higher)
• Output voltage adjustability range (minimum 0.6V floor required)
• Output current capability (minimum 15A required for direct substitution)
• Switching frequency range (200kHz minimum)
• Synchronous rectifier presence (required for efficiency equivalence)
• Operating temperature range (-40°C to 125°C minimum)
• RoHS compliance status
• Manufacturer series alignment (Power Blox™)

The XR76121ELTR-F qualifies as a manufacturer-recommended substitute based on these parameters. It maintains compatibility across all critical electrical specifications while offering enhanced performance characteristics in specific areas.

Parameter Comparison

Engineering Selection Recommendations

The XR76121ELTR-F is the manufacturer-recommended substitute for the obsolete XR76115ELTR-F. Both components maintain identical input voltage specifications (4.5V to 22V) and minimum output voltage floor (0.6V), ensuring functional compatibility in existing circuit topologies.

The XR76121ELTR-F provides enhanced specifications: 20A output current (versus 15A), extended maximum output voltage to 22V (versus 18V), and increased switching frequency capability to 1MHz (versus 800kHz). These improvements deliver greater design flexibility and performance headroom for new implementations.

Both parts carry RoHS compliance certification and operate across the full industrial temperature range (-40°C to 125°C). The transition from the 37-PowerVFQFN package to the 16-PowerVQFN package requires PCB layout modification but maintains the same mounting technology (surface mount).

The active product status of the XR76121ELTR-F ensures long-term supply availability and ongoing manufacturer support, addressing the supply chain risk associated with the obsolete XR76115ELTR-F.

Frequently Asked Questions (FAQ)

Q: Can the XR76121ELTR-F directly replace the XR76115ELTR-F without circuit modifications?

A: Electrical substitution is valid for applications where output current does not exceed 15A and output voltage remains within 18V maximum. The identical input voltage range, output voltage floor, and synchronous rectifier architecture ensure functional compatibility. However, PCB layout redesign is required due to package differences (37-PowerVFQFN versus 16-PowerVQFN).

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

A: The XR76121ELTR-F offers higher output current (20A versus 15A), extended maximum output voltage (22V versus 18V), and wider switching frequency range (200kHz to 1MHz versus 200kHz to 800kHz). The substitute uses a smaller package footprint (16-PowerVQFN versus 37-PowerVFQFN).

Q: Are there any compliance or certification differences?

A: Both parts maintain identical RoHS compliance status and operate across the same industrial temperature range (-40°C to 125°C). No compliance barriers exist for substitution.

Q: Why is the package different if these are equivalent parts?

A: The XR76121ELTR-F achieves higher current capability (20A) through improved die design and thermal management within a more compact package. This represents a technology advancement within the Power Blox™ series rather than a direct pin-for-pin replacement.

Q: Is the XR76121ELTR-F suitable for all applications currently using the XR76115ELTR-F?

A: Yes, for applications operating within the original specifications (15A maximum output current, 18V maximum output voltage). Applications requiring the extended specifications of the XR76121ELTR-F benefit from additional performance margin and design flexibility.