MP2120DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2120DQ-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable output applications. This device delivers 2.5A output current with an adjustable output voltage range of 0.8V to 4.95V, operating from a 2.7V to 5.5V input supply. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute components is necessary for ongoing production support, design revisions, or when inventory becomes unavailable.

Substiute Parts

MP2120DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 2944MP2120DQ-LF-Z Datasheet

Current PartRFQ

MP2143HGD-Z

Monolithic Power Systems Inc.In Stock: 26490MP2143HGD-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The MP2143HGD-Z qualifies as a manufacturer-recommended substitute based on the following substitution criteria:

Functional Compatibility: Both devices are buck switching regulators with positive adjustable output configurations, identical topology, and synchronous rectification capability.

Electrical Parameters: The MP2143HGD-Z maintains compatibility across critical electrical specifications:

• Input voltage range (2.5V – 5.5V) encompasses the MP2120DQ-LF-Z requirement (2.7V – 5.5V)
• Output voltage range (0.6V – 5V) exceeds the original specification (0.8V – 4.95V)
• Output current (3A) exceeds the original specification (2.5A), providing design margin
• Switching frequency (1.8MHz – 3MHz) is comparable to the original (1.5MHz)

Package Compatibility: Both devices use 10-VFDFN packages with exposed pads, ensuring mechanical and thermal compatibility in existing PCB layouts.

Compliance & Status: The MP2143HGD-Z is Active product status with ROHS3 compliance, REACH unaffected, and unlimited moisture sensitivity level (MSL 1), matching the original part's compliance profile.

Parameter Comparison

Engineering Selection Recommendations

The MP2143HGD-Z is the manufacturer-recommended substitute for the MP2120DQ-LF-Z. Selection should be based on the following engineering criteria:

Product Lifecycle: The MP2120DQ-LF-Z is designated "Not For New Designs," indicating end-of-life status. The MP2143HGD-Z is Active product status, ensuring long-term availability and manufacturer support for new designs and production continuity.

Compliance & Certifications: Both parts maintain identical ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1). No compliance barriers exist for substitution.

Electrical Performance: The MP2143HGD-Z provides enhanced electrical specifications across all critical parameters. Higher output current (3A vs. 2.5A), expanded output voltage range (0.6V – 5V vs. 0.8V – 4.95V), and lower minimum input voltage (2.5V vs. 2.7V) offer design flexibility and margin. The wider operating temperature range (-40°C to 125°C vs. -40°C to 85°C) supports extended environmental applications.

Package Compatibility: Both devices use 10-VFDFN packages with exposed pads. PCB layouts designed for the MP2120DQ-LF-Z are mechanically and thermally compatible with the MP2143HGD-Z without redesign.

Frequently Asked Questions (FAQ)

Q: Can the MP2143HGD-Z directly replace the MP2120DQ-LF-Z in existing designs?

A: Yes. Both devices share identical package geometry (10-VFDFN with exposed pad), functional topology (buck regulator with positive adjustable output), and compliance certifications. The MP2143HGD-Z provides equal or superior electrical performance across all specified parameters. No PCB modifications are required.

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

A: The MP2143HGD-Z offers higher output current (3A vs. 2.5A), lower minimum output voltage (0.6V vs. 0.8V), lower minimum input voltage (2.5V vs. 2.7V), and a wider operating temperature range (-40°C to 125°C vs. -40°C to 85°C). These differences favor the substitute in terms of design flexibility and performance margin.

Q: Are there any package or pinout differences?

A: Both parts use 10-VFDFN packages with exposed pads. The MP2120DQ-LF-Z uses a 3x3mm footprint, while the MP2143HGD-Z uses a 3x2mm footprint. Verify PCB layout compatibility with the specific footprint dimensions before assembly.

Q: Why is the MP2120DQ-LF-Z marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing inventory may remain available, but long-term supply cannot be guaranteed. The MP2143HGD-Z is the active alternative for ongoing production and new designs.

Q: Are both parts RoHS compliant?

A: Yes. Both the MP2120DQ-LF-Z and MP2143HGD-Z are ROHS3 compliant with REACH unaffected status and unlimited moisture sensitivity level (MSL 1).

Q: What switching frequency should I expect from the MP2143HGD-Z?

A: The MP2143HGD-Z operates at a switching frequency range of 1.8MHz to 3MHz, compared to the fixed 1.5MHz of the MP2120DQ-LF-Z. This higher frequency may result in smaller output filter components and improved transient response in applications where frequency variation is acceptable.