MP6900DS-LF-Z Equivalent & Substitute Parts

Part Overview

The MP6900DS-LF-Z is a secondary-side controller IC manufactured by Monolithic Power Systems Inc., designed for power supply applications requiring synchronous rectifier control. This device operates with a supply voltage range of 8V to 24V and is housed in an 8-SOIC surface mount package.

The MP6900DS-LF-Z carries a "Not For New Designs" product status, indicating that Monolithic Power Systems Inc. has discontinued active development and support for this component. This status necessitates identifying functionally equivalent alternatives for new design implementations and ongoing production requirements where component availability or long-term support is a consideration.

Substiute Parts

MP6900DS-LF-Z

Monolithic Power Systems Inc.In Stock: 20156MP6900DS-LF-Z Datasheet

Current PartRFQ

TEA1791AT/N1,118

NXP USA Inc.In Stock: 2038TEA1791AT/N1,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP6900DS-LF-Z is determined by the following critical parameters:

Package Compatibility: The substitute part must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Functional Classification: The substitute must serve as a secondary-side controller for power supply applications, maintaining the same functional role within the power conversion circuit.

Supply Voltage Range: The substitute's supply voltage specification must encompass or exceed the original 8V to 24V operating range. A substitute with a wider or equal voltage range ensures compatibility across the intended application envelope.

Thermal Operating Range: The substitute must support the -40°C to 125°C operating temperature range or a range that fully contains it.

Regulatory Compliance: The substitute must maintain ROHS3 compliance and REACH unaffected status to satisfy current manufacturing and environmental regulations.

The TEA1791AT/N1,118 manufactured by NXP USA Inc. meets all substitution criteria, with the additional benefit of an "Active" product status and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The TEA1791AT/N1,118 is the qualified substitute for the MP6900DS-LF-Z based on the following engineering criteria:

Package Equivalence: Both devices utilize the 8-SOIC package, ensuring direct PCB compatibility without layout modifications.

Functional Alignment: Both components are classified as secondary-side controllers for power supply applications, maintaining identical functional roles.

Supply Voltage Coverage: The TEA1791AT/N1,118 supply voltage range of 8.5V to 38V encompasses the original 8V to 24V specification, providing broader application flexibility.

Thermal Performance: The TEA1791AT/N1,118 extends the upper operating temperature limit to 150°C compared to the original 125°C, supporting higher thermal environments.

Product Status: The TEA1791AT/N1,118 carries "Active" status, ensuring ongoing manufacturer support, availability, and continued development. This contrasts with the MP6900DS-LF-Z "Not For New Designs" status.

Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Moisture Handling: The TEA1791AT/N1,118 features MSL 1 (Unlimited) compared to MSL 2 (1 Year), providing superior moisture resistance and extended shelf life.

Frequently Asked Questions (FAQ)

Q: Can the TEA1791AT/N1,118 be used as a direct replacement for the MP6900DS-LF-Z without PCB modifications?

A: Yes. Both devices use the 8-SOIC (0.154", 3.90mm Width) package with identical pinout compatibility for secondary-side controller applications. No PCB layout changes are required.

Q: What is the significance of the "Not For New Designs" status on the MP6900DS-LF-Z?

A: This status indicates that Monolithic Power Systems Inc. has discontinued active development and support for this component. New designs should utilize the TEA1791AT/N1,118, which carries "Active" status and ensures long-term availability and manufacturer support.

Q: Does the TEA1791AT/N1,118 operate within the original supply voltage range?

A: Yes. The TEA1791AT/N1,118 supply voltage range of 8.5V to 38V fully encompasses the original MP6900DS-LF-Z range of 8V to 24V. The substitute provides extended voltage coverage for broader application flexibility.

Q: Are there thermal operating range differences between these devices?

A: The TEA1791AT/N1,118 supports -40°C to 150°C, extending the upper temperature limit by 25°C compared to the MP6900DS-LF-Z (-40°C to 125°C). Both devices maintain the same lower temperature limit.

Q: What is the difference in moisture sensitivity levels?

A: The MP6900DS-LF-Z carries MSL 2 (1 Year), while the TEA1791AT/N1,118 carries MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and eliminates the one-year shelf life limitation, reducing storage and handling constraints.

Q: Do both devices maintain the same regulatory compliance?

A: Yes. Both the MP6900DS-LF-Z and TEA1791AT/N1,118 are ROHS3 compliant and REACH unaffected, satisfying current environmental and regulatory requirements.

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

A: The MP6900DS-LF-Z draws 3 mA, while the TEA1791AT/N1,118 draws 950 µA. The lower supply current of the substitute may provide marginal power efficiency benefits in certain applications.