MP2117DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2117DQ-LF-Z is a buck switching regulator IC from Monolithic Power Systems Inc., designed for positive adjustable step-down voltage regulation with a 2.2A output current capability. This component operates across a 2.5V to 6V input range and delivers adjustable output from 0.6V to 6V, making it suitable for portable and battery-powered applications requiring compact power management solutions.

The MP2117DQ-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity when original inventory becomes unavailable.

Substiute Parts

MP2117DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 10247MP2117DQ-LF-Z Datasheet

Current PartRFQ

MP2161AGJ-Z

Monolithic Power Systems Inc.In Stock: 1292MP2161AGJ-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP2117DQ-LF-Z is determined by the following critical parameters:

• Input voltage range compatibility (2.5V to 6V minimum requirement)
• Output voltage adjustability (0.6V to 6V range)
• Output current capability (minimum 2.2A)
• Synchronous rectifier topology
• Single output configuration
• Surface mount technology
• RoHS3 compliance and MSL Level 1 rating

The MP2161AGJ-Z qualifies as a manufacturer-recommended substitute based on these core electrical and mechanical specifications. While package form factor differs (TSOT-23-8 versus 10-VFDFN), the functional electrical parameters remain compatible for applications where board space and thermal management constraints permit package substitution.

Parameter Comparison

Engineering Selection Recommendations

The MP2161AGJ-Z is the manufacturer-recommended substitute for the MP2117DQ-LF-Z. Both devices maintain identical input and output voltage specifications, synchronous rectifier topology, and regulatory compliance (ROHS3, MSL Level 1).

Key considerations for substitution:

The MP2161AGJ-Z operates at a higher maximum junction temperature (125°C versus 85°C ambient), providing improved thermal margin in high-temperature environments. Output current capacity is 2A versus 2.2A on the original part; applications requiring the full 2.2A specification must be evaluated for current headroom.

The MP2161AGJ-Z uses TSOT-23-8 packaging instead of 10-VFDFN, resulting in a smaller footprint but reduced thermal dissipation capability through the package. Thermal management and PCB layout must be reassessed for the substitute package.

The MP2161AGJ-Z carries "Active" product status, ensuring long-term availability and continued manufacturer support, whereas the MP2117DQ-LF-Z is designated "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can the MP2161AGJ-Z directly replace the MP2117DQ-LF-Z without circuit modifications?

A: The MP2161AGJ-Z maintains electrical compatibility across input voltage range, output voltage adjustability, and control topology. However, the package change from 10-VFDFN to TSOT-23-8 requires PCB layout redesign. The reduced output current rating (2A versus 2.2A) must be verified against application load requirements.

Q: What are the thermal implications of switching from 10-VFDFN to TSOT-23-8 packaging?

A: The 10-VFDFN package includes an exposed pad for enhanced thermal dissipation, while TSOT-23-8 relies on lead-based heat transfer. Applications with high power dissipation may experience elevated junction temperatures with the substitute package. Thermal analysis and potentially increased heatsinking are necessary.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the MP2117DQ-LF-Z and MP2161AGJ-Z are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (unlimited moisture sensitivity). Both are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Q: Why is the MP2117DQ-LF-Z marked "Not For New Designs"?

A: This designation indicates the part has been superseded by newer alternatives in the manufacturer's product portfolio. The MP2161AGJ-Z represents the active replacement offering improved thermal performance and long-term availability assurance.

Q: What is the impact of the 0.2A current reduction (2.2A to 2A)?

A: Applications operating near the 2.2A maximum specification require margin analysis. If the design includes 10% or greater current headroom below 2A, substitution is feasible. Designs operating above 2A require alternative parts or circuit redesign.