MP2112DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2112DQ-LF-Z 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 input voltage range of 2.5V to 6V and adjustable output from 0.6V to 6V. The part operates at a switching frequency of 1.05MHz and includes a synchronous rectifier for improved efficiency.

The MP2112DQ-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this regulator is already deployed.

Substiute Parts

MP2112DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 24343MP2112DQ-LF-Z Datasheet

Current PartRFQ

MP2148GQD-Z

Monolithic Power Systems Inc.In Stock: 25281MP2148GQD-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP2112DQ-LF-Z is determined by the following critical parameters:

• Function and topology (step-down buck converter)
• Output configuration (positive adjustable)
• Output current capability (1A minimum)
• Output voltage range compatibility (0.6V to 6V minimum)
• Input voltage range overlap (minimum 2.5V to 6V)
• Synchronous rectifier presence
• Surface mount packaging in QFN form factor
• RoHS3 compliance and MSL rating

The MP2148GQD-Z qualifies as a manufacturer-recommended substitute based on these criteria. Both devices share the same functional topology, output current rating, adjustable output voltage floor, and compliance certifications. Differences in input voltage range, switching frequency, operating temperature range, and package footprint are secondary considerations that do not preclude substitution in applications where the MP2112DQ-LF-Z was originally specified.

Parameter Comparison

Engineering Selection Recommendations

The MP2148GQD-Z is the manufacturer-recommended substitute for the MP2112DQ-LF-Z. Both devices maintain ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring equivalent environmental and regulatory qualification.

The MP2148GQD-Z carries an "Active" product status, providing ongoing manufacturer support and availability. The MP2112DQ-LF-Z is designated "Not For New Designs," making the MP2148GQD-Z the appropriate choice for production continuity and long-term supply assurance.

Key differences exist in input voltage maximum (5.5V vs. 6V), output voltage maximum (5.5V vs. 6V), switching frequency (2.2MHz vs. 1.05MHz), and operating temperature range (-40°C to 125°C vs. -40°C to 85°C). These differences must be evaluated against specific application requirements to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the MP2148GQD-Z directly replace the MP2112DQ-LF-Z without circuit modifications?

A: Both devices share identical output current (1A), adjustable output voltage floor (0.6V), and synchronous rectifier architecture. Direct substitution is possible if the application input voltage does not exceed 5.5V and output voltage does not exceed 5.5V. Circuit layout may require adjustment due to package footprint differences (6-VDFN vs. 6-VFDFN).

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

A: The MP2112DQ-LF-Z uses a 6-VDFN Exposed Pad package (3x3mm), while the MP2148GQD-Z uses a 6-VFDFN package (1x1.5mm). The MP2148GQD-Z has a smaller footprint. PCB layout and thermal management considerations may differ.

Q: Are there input voltage limitations when substituting?

A: The MP2112DQ-LF-Z accepts input up to 6V, while the MP2148GQD-Z is rated to 5.5V maximum. Applications requiring input voltages above 5.5V cannot use the MP2148GQD-Z as a substitute.

Q: How do the switching frequencies affect substitution?

A: The MP2112DQ-LF-Z operates at 1.05MHz, while the MP2148GQD-Z operates at 2.2MHz. Higher switching frequency in the substitute may affect output filter design, EMI characteristics, and efficiency. Application-specific evaluation is required.

Q: What is the temperature range difference?

A: The MP2112DQ-LF-Z operates from -40°C to 85°C (TA), while the MP2148GQD-Z operates from -40°C to 125°C (TJ). The MP2148GQD-Z provides extended high-temperature capability, suitable for applications requiring higher thermal margins.