MP2117DN-LF-Z Equivalent & Substitute Parts

Part Overview

The MP2117DN-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 2.2A output current and operates across a 2.5V to 6V input range with adjustable output from 0.6V to 6V. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and designs requiring compatible buck regulator functionality with similar electrical and mechanical characteristics.

Substiute Parts

MP2117DN-LF-Z

Monolithic Power Systems Inc.In Stock: 2563MP2117DN-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 of the MP2117DN-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)
• Buck topology with synchronous rectification
• Single output configuration
• Surface mount technology
• RoHS3 compliance
• Operating temperature range support

The MP2161AGJ-Z qualifies as a manufacturer-recommended substitute based on matching these core electrical specifications while offering improved product status (Active vs. Not For New Designs) and enhanced environmental ratings.

Parameter Comparison

Engineering Selection Recommendations

The MP2161AGJ-Z is the manufacturer-recommended substitute for the MP2117DN-LF-Z. Both devices maintain identical input and output voltage specifications, enabling direct functional replacement in buck regulator applications. The MP2161AGJ-Z offers several advantages: Active product status ensures long-term availability and manufacturing support, extended operating temperature range (-40°C to 125°C junction temperature vs. -40°C to 85°C ambient), and improved moisture sensitivity rating (MSL 1 Unlimited vs. MSL 2A 4 Weeks).

The primary design consideration is package form factor: the MP2117DN-LF-Z uses 8-SOIC with 3.90mm width, while the MP2161AGJ-Z uses SOT-23-8 thin package. This requires PCB layout modification. Output current differs slightly (2.2A vs. 2A), which is acceptable for applications designed within the 2A specification envelope. Switching frequency increases from 1.25MHz to 1.5MHz, affecting filter component selection and EMI characteristics.

Both parts maintain ROHS3 compliance and identical electrical topology (buck with synchronous rectification), supporting seamless functional substitution with layout and component value adjustments.

Frequently Asked Questions (FAQ)

Q: Can the MP2161AGJ-Z directly replace the MP2117DN-LF-Z without PCB modifications?

A: Functional replacement is possible, but PCB layout modification is required due to different package types. The MP2117DN-LF-Z uses 8-SOIC (3.90mm width), while the MP2161AGJ-Z uses SOT-23-8 thin package. Pin assignments must be verified and the PCB footprint redesigned accordingly.

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

A: The MP2161AGJ-Z provides 2A output current versus 2.2A for the MP2117DN-LF-Z. Applications designed for 2A operation are fully compatible. Designs requiring the full 2.2A specification must evaluate whether the reduced margin is acceptable for the specific application.

Q: How does the switching frequency difference affect circuit design?

A: The MP2161AGJ-Z operates at 1.5MHz compared to 1.25MHz for the MP2117DN-LF-Z. This higher frequency typically allows smaller filter inductors and capacitors but increases switching losses. Output filter component values must be recalculated based on the new switching frequency to maintain equivalent ripple voltage and current characteristics.

Q: Are there compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant with identical REACH and ECCN classifications (EAR99). The MP2161AGJ-Z offers superior moisture sensitivity rating (MSL 1 Unlimited vs. MSL 2A 4 Weeks), reducing handling and storage constraints. The MP2161AGJ-Z also supports extended operating temperature range, beneficial for high-temperature applications.

Q: Is the MP2161AGJ-Z suitable for new designs?

A: Yes. The MP2161AGJ-Z carries Active product status, making it appropriate for new designs. The MP2117DN-LF-Z is classified as "Not For New Designs," making the MP2161AGJ-Z the recommended choice for ongoing and future development.