MP6901DS-LF-Z Equivalent & Substitute Parts

Part Overview

The MP6901DS-LF-Z is a secondary-side controller IC manufactured by Monolithic Power Systems Inc., designed for power supply applications. This 8-SOIC surface mount device operates with a supply voltage range of 8V to 24V and a maximum supply current of 3 mA. The part carries a "Not For New Designs" status, indicating it is obsolete or in end-of-life phase. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this controller remains in use.

Substiute Parts

MP6901DS-LF-Z

Monolithic Power Systems Inc.In Stock: 40115MP6901DS-LF-Z Datasheet

Current PartRFQ

SG1548J

Microchip TechnologyIn Stock: 1426SG1548J Datasheet

MFR RecommendedRFQ

TEA1716T/1,518

NXP USA Inc.In Stock: 916TEA1716T/1,518 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MP6901DS-LF-Z is constrained by its specific functional role as a secondary-side controller and its electrical operating parameters. The primary substitution criteria are:

• Supply voltage compatibility within the 8V to 24V range
• Power management (PMIC) category classification
• Operating temperature range support (-40°C minimum to 125°C minimum)
• RoHS compliance status for regulatory alignment
• Functional equivalence in secondary-side control applications

The identified substitute parts represent alternatives that satisfy these core electrical and functional requirements. However, package and mounting type differences exist, which may require circuit board redesign or adapter solutions depending on application constraints.

Parameter Comparison

Engineering Selection Recommendations

SG1548J (Microchip Technology): This part offers extended supply voltage range (4.5V ~ 35V) that encompasses the MP6901DS-LF-Z operating window. However, it is RoHS non-compliant, which may conflict with regulatory requirements in applications subject to ROHS3 mandates. The through-hole mounting type requires PCB redesign compared to the surface mount original. The part is currently active in production, ensuring availability.

TEA1716T/1,518 (NXP USA Inc.): This part maintains ROHS3 compliance and surface mount compatibility, minimizing PCB redesign requirements. However, its supply voltage specification (70 ~ 276 VAC) indicates a different functional application focus (PFC controller) compared to the secondary-side controller role of the MP6901DS-LF-Z. The 24-SOIC package is larger than the original 8-SOIC, requiring board layout modifications. The part is currently active in production.

Selection between these substitutes depends on regulatory compliance requirements, PCB redesign tolerance, and functional application alignment.

Frequently Asked Questions (FAQ)

Q: Can SG1548J directly replace MP6901DS-LF-Z without PCB modifications?

A: No. SG1548J uses through-hole mounting (16-CDIP package) while MP6901DS-LF-Z uses surface mount (8-SOIC package). PCB redesign is required. Additionally, SG1548J is RoHS non-compliant, which may not meet regulatory requirements for your application.

Q: Is TEA1716T/1,518 functionally equivalent to MP6901DS-LF-Z?

A: Both are power management ICs, but TEA1716T/1,518 is specified as a PFC controller with AC input voltage range (70 ~ 276 VAC), while MP6901DS-LF-Z is a secondary-side controller with DC supply voltage (8V ~ 24V). Functional equivalence depends on your specific circuit requirements.

Q: What are the key differences in package size?

A: MP6901DS-LF-Z uses 8-SOIC (0.154" width), SG1548J uses 16-CDIP, and TEA1716T/1,518 uses 24-SOIC (0.295" width). Larger packages require more PCB real estate and may not fit existing board layouts designed for the original part.

Q: Does RoHS compliance matter for my application?

A: RoHS compliance is mandatory for products sold in the European Union and many other regulated markets. MP6901DS-LF-Z and TEA1716T/1,518 are ROHS3 compliant. SG1548J is RoHS non-compliant and may not be acceptable for regulated applications.

Q: What is the supply current difference between these parts?

A: MP6901DS-LF-Z draws 3 mA, SG1548J draws 4.8 mA, and TEA1716T/1,518 supply current is not specified. Higher supply current may affect power budget calculations in battery-powered or low-power applications.

Q: Are these parts currently available?

A: MP6901DS-LF-Z has 40,100 units in stock but is marked "Not For New Designs." SG1548J has 1,331 units in stock and is active. TEA1716T/1,518 has 863 units in stock and is active. Availability should be verified with your supplier for current inventory status.