MP28114DG-LF-Z Equivalent & Substitute Parts

Part Overview

The MP28114DG-LF-Z is an active buck switching regulator IC manufactured by Monolithic Power Systems Inc., designed for positive adjustable voltage regulation with 600mA output current capability. This component operates across a 2.5V to 6V input range with adjustable output from 0.6V to 6V, utilizing a 1.7MHz switching frequency and integrated synchronous rectification. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and commercial applications requiring compact surface-mount power management solutions.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining compatibility with the target application's mechanical and thermal requirements.

Substiute Parts

MP28114DG-LF-Z

Monolithic Power Systems Inc.In Stock: 30368MP28114DG-LF-Z Datasheet

Current PartRFQ

RT5707AWSC

Richtek USA Inc.In Stock: 183514RT5707AWSC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP28114DG-LF-Z is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Function: Step-down (buck) topology required
• Output Configuration: Positive adjustable or programmable output
• Input Voltage Range: Must encompass or overlap the 2.5V to 6V specification
• Output Voltage Range: Must support the 0.6V minimum output requirement
• Output Current: Minimum 600mA capability
• Synchronous Rectifier: Integrated synchronous rectification required
• Operating Temperature: Must maintain -40°C to 85°C range

Mechanical & Compliance Criteria:

• Mounting Type: Surface mount only
• Product Status: Active status required
• RoHS Compliance: ROHS3 compliant
• MSL Rating: Level 1 (Unlimited) preferred for supply chain flexibility

The RT5707AWSC qualifies as a substitute based on matching buck topology, positive output configuration, overlapping input voltage range (2.2V to 5.5V encompasses the lower portion of the MP28114 range), integrated synchronous rectification, identical operating temperature range, active product status, and equivalent RoHS3 compliance. Package differences (8-WLCSP vs. 8-TFDFN) require PCB layout redesign but do not affect electrical substitution validity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution Validity:

The RT5707AWSC is qualified as an electrical substitute for the MP28114DG-LF-Z based on matching buck topology, positive output configuration, overlapping input voltage specifications, integrated synchronous rectification, and identical thermal operating range. Both components maintain active product status with full RoHS3 compliance and unlimited moisture sensitivity ratings, ensuring supply chain continuity and regulatory compliance.

Application-Specific Constraints:

Selection between these components must account for the following parameter differences:

1. Input Voltage Maximum: The RT5707AWSC specifies 5.5V maximum input versus 6V for the MP28114. Applications operating near the 6V upper limit require verification that the RT5707 input range provides adequate system margin.

2. Output Voltage Maximum: The RT5707AWSC maximum output of 3.1V is substantially lower than the MP28114's 6V capability. This limitation restricts the RT5707 to applications requiring output voltages not exceeding 3.1V.

3. Switching Frequency: The RT5707 operates at 1.2MHz compared to the MP28114's 1.7MHz. This frequency difference affects inductor and capacitor selection, PCB layout considerations, and electromagnetic interference characteristics.

4. Package Transition: Migration from 8-TFDFN to 8-WLCSP packaging requires PCB layout redesign, including modified trace routing, via placement, and thermal management provisions.

Compliance Assurance:

Both components satisfy RoHS3 requirements and maintain unlimited moisture sensitivity ratings, eliminating compliance barriers to substitution. Active product status for both parts ensures long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the RT5707AWSC directly replace the MP28114DG-LF-Z without PCB modifications?

A: No. While both components are electrically compatible buck regulators, they use different package types (8-TFDFN versus 8-WLCSP). PCB layout redesign is required, including trace routing, via placement, and thermal pad configuration adjustments specific to the WLCSP package geometry.

Q: What is the significance of the output voltage maximum difference (6V vs. 3.1V)?

A: The MP28114 supports adjustable output up to 6V, while the RT5707 is limited to 3.1V maximum output. Applications requiring output voltages above 3.1V cannot use the RT5707 as a substitute. Verify your target output voltage specification before selecting either component.

Q: How does the switching frequency difference (1.7MHz vs. 1.2MHz) affect component selection?

A: The lower switching frequency of the RT5707 requires larger inductor and capacitor values compared to the MP28114 design. This impacts PCB board space, component cost, and electromagnetic interference characteristics. Recalculate filter component values based on the 1.2MHz frequency when transitioning to the RT5707.

Q: Are both components suitable for industrial temperature applications?

A: Yes. Both the MP28114DG-LF-Z and RT5707AWSC operate across the -40°C to 85°C temperature range, meeting industrial and commercial application requirements.

Q: What are the RoHS and moisture sensitivity implications of substitution?

A: Both components are ROHS3 compliant with MSL Level 1 (Unlimited) ratings. No compliance barriers exist for substitution. Supply chain handling and storage procedures remain identical for both parts.

Q: Does the programmable output configuration of the RT5707 provide advantages over the adjustable output of the MP28114?

A: The programmable output of the RT5707 offers design flexibility through digital control interfaces, while the MP28114's adjustable output uses resistor-based configuration. Selection depends on whether your application requires digital programmability or fixed resistor-based voltage setting.

Q: What input voltage range overlap exists between these components?

A: The MP28114 specifies 2.5V to 6V input, while the RT5707 specifies 2.2V to 5.5V input. The overlap range is 2.5V to 5.5V. Applications operating above 5.5V input cannot use the RT5707.