MP2112DQ-LF-P Equivalent & Substitute Parts

Part Overview

The MP2112DQ-LF-P is a buck switching regulator IC from Monolithic Power Systems Inc., designed for step-down voltage conversion with positive adjustable output. This device delivers 1A output current with an adjustable output range from 0.6V to 6V, operating from a 2.5V to 6V input supply. The part is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Finding equivalent or substitute parts is necessary for applications requiring continued support, design flexibility, or inventory optimization while maintaining functional compatibility.

Substiute Parts

MP2112DQ-LF-P

Monolithic Power Systems Inc.In Stock: 859MP2112DQ-LF-P Datasheet

Current PartRFQ

MP2148GQD-P

Monolithic Power SystemsIn Stock: 1142MP2148GQD-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP2112DQ-LF-P is determined by the following critical parameters:

• Topology & Function: Buck switching regulator with step-down conversion capability
• Output Configuration: Positive adjustable output from 0.6V minimum
• Output Current: 1A rated output current
• Input Voltage Range: Minimum 2.5V input support
• Synchronous Rectification: Integrated synchronous rectifier for efficiency
• Package Compatibility: 6-pin QFN surface mount package
• Compliance: ROHS3 compliant, REACH unaffected

The MP2148GQD-P qualifies as a manufacturer-recommended substitute based on matching these core functional and electrical parameters while offering enhanced specifications in certain areas.

Parameter Comparison

Engineering Selection Recommendations

The MP2148GQD-P is the manufacturer-recommended substitute for the MP2112DQ-LF-P. Both devices maintain identical output current capability (1A) and adjustable output voltage range starting at 0.6V, ensuring functional compatibility for most applications.

The MP2148GQD-P offers the following advantages:

• Active Product Status: The MP2148GQD-P is an active product, providing long-term availability and continued manufacturer support, whereas the MP2112DQ-LF-P is designated "Not For New Designs"
• Extended Operating Temperature Range: Operating to 125°C (TJ) versus 85°C (TA) on the main part, providing thermal margin for demanding environments
• Higher Switching Frequency: 2.2MHz operation enables smaller external component sizing compared to 1.05MHz
• Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status

Design considerations for substitution:

• Input voltage range differs slightly: MP2148GQD-P operates from 2.3V minimum (versus 2.5V) and maximum 5.5V (versus 6V). Verify input supply specifications fall within 2.3V to 5.5V for direct substitution
• Output voltage maximum is 5.5V on the substitute versus 6V on the main part. Applications requiring output above 5.5V require design review
• Package variants differ (6-VDFN versus 6-VFDFN); PCB layout compatibility must be confirmed despite both being 6-pin QFN surface mount devices

Frequently Asked Questions (FAQ)

Q: Can the MP2148GQD-P directly replace the MP2112DQ-LF-P in existing designs?

A: Direct replacement is possible if the application input voltage remains within 2.3V to 5.5V and output voltage does not exceed 5.5V. The higher switching frequency (2.2MHz) may require external component value adjustments for optimal performance. PCB layout modifications may be necessary due to package differences.

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

A: The primary differences are product status (active versus not for new designs), operating temperature range (125°C versus 85°C), switching frequency (2.2MHz versus 1.05MHz), and input/output voltage maximums (5.5V versus 6V). Core functionality—1A buck regulation with adjustable output from 0.6V—remains identical.

Q: Are there any package compatibility concerns?

A: Both parts use 6-pin QFN surface mount packages, but the specific package designations differ (6-VDFN Exposed Pad versus 6-VFDFN). Physical dimensions and pin layouts should be verified against PCB footprints before implementation.

Q: Does the higher switching frequency of the MP2148GQD-P affect circuit design?

A: The 2.2MHz switching frequency on the MP2148GQD-P is approximately double that of the MP2112DQ-LF-P at 1.05MHz. This allows for smaller inductor and capacitor values but may require component selection review and EMI assessment for the specific application.

Q: Are both parts RoHS and REACH compliant?

A: Yes, both the MP2112DQ-LF-P and MP2148GQD-P are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for industrial and commercial applications.