MP20043DGT-C-LF-Z Equivalent & Substitute Parts

Part Overview

The MP20043DGT-C-LF-Z is a linear voltage regulator IC from Monolithic Power Systems Inc. designed for positive programmable dual-output applications. This device delivers 300mA per output channel in an 8-TQFN (2x2) surface mount package with integrated protection features including over-current, over-temperature, and short-circuit protection.

The MP20043DGT-C-LF-Z carries a "Not For New Designs" product status. Identifying equivalent substitute parts is necessary for design continuity, inventory management, and ensuring long-term supply chain reliability for existing applications.

Substiute Parts

MP20043DGT-C-LF-Z

Monolithic Power Systems Inc.In Stock: 10335MP20043DGT-C-LF-Z Datasheet

Current PartRFQ

MP20041DGT-SS-LF-Z

Monolithic Power Systems Inc.In Stock: 40196MP20041DGT-SS-LF-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP20043DGT-C-LF-Z is determined by the following critical parameters:

• Identical package type: 8-TQFN (2x2) with exposed pad
• Dual positive output configuration with 300mA per channel capability
• Compatible input voltage range (maximum 5.5V or higher)
• Output voltage compatibility within the 1.8V to 3.3V range
• Matching or superior dropout voltage performance
• Identical operating temperature range: -40°C to 125°C
• Surface mount technology (SMT)
• RoHS3 compliance and MSL Level 1 rating

The MP20041DGT-SS-LF-Z qualifies as a substitute based on these parameters. While it features fixed output voltages (3.3V/3.3V) rather than programmable outputs, it maintains electrical and mechanical compatibility for applications requiring fixed 3.3V dual outputs.

Parameter Comparison

Engineering Selection Recommendations

The MP20041DGT-SS-LF-Z is the manufacturer-recommended substitute for the MP20043DGT-C-LF-Z. Selection between these parts depends on application requirements:

Choose MP20041DGT-SS-LF-Z when:

• Fixed 3.3V dual outputs meet application requirements
• Active product status and ongoing supply chain support are required
• Lower typical dropout voltage (0.22V vs 0.28V) provides design margin benefits
• Higher maximum input voltage (6V vs 5.5V) is advantageous

Retain MP20043DGT-C-LF-Z only when:

• Programmable output voltage selection (1.8V, 2.8V, or 3.3V) is mandatory
• Existing inventory supports current production needs
• Short-circuit protection is a critical requirement

Both parts maintain identical package geometry, thermal characteristics, compliance certifications (ROHS3, MSL Level 1), and operating temperature range, ensuring mechanical and thermal compatibility in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can MP20041DGT-SS-LF-Z directly replace MP20043DGT-C-LF-Z in existing designs?

A: Direct replacement is possible only if your application requires fixed 3.3V outputs on both channels. The MP20041DGT-SS-LF-Z cannot provide the programmable voltage selection (1.8V, 2.8V options) of the MP20043DGT-C-LF-Z. Verify your output voltage requirements before substitution.

Q: Are the packages physically identical?

A: Yes. Both parts use the 8-TQFN (2x2) package with exposed pad (8-VFDFN). Pin-to-pin compatibility and PCB footprint are identical, requiring no layout modifications.

Q: What is the difference in dropout voltage performance?

A: The MP20041DGT-SS-LF-Z has a typical dropout voltage of 0.22V @ 300mA, compared to the MP20043DGT-C-LF-Z maximum of 0.28V @ 300mA. This represents improved efficiency in the substitute part.

Q: Why is MP20043DGT-C-LF-Z marked "Not For New Designs"?

A: This status indicates the part is in mature/legacy phase. Monolithic Power Systems recommends the MP20041DGT-SS-LF-Z for new designs. Existing designs may continue using MP20043DGT-C-LF-Z inventory, but long-term supply cannot be guaranteed.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity), REACH Unaffected status, and identical ECCN/HTSUS classifications.

Q: What protection features differ between these parts?

A: The MP20043DGT-C-LF-Z includes short-circuit protection in addition to over-current and over-temperature protection. The MP20041DGT-SS-LF-Z provides over-current and over-temperature protection. Verify if short-circuit protection is required for your application.