MIC2177-3.3BWM Equivalent & Substitute Parts

Part Overview

The MIC2177-3.3BWM is a buck switching regulator IC from Microchip Technology designed for step-down voltage conversion. It delivers a fixed 3.3V output at 2.5A maximum current, operating from a 4.5V to 16.5V input range. The device is housed in a 20-SOIC surface mount package with a switching frequency of 200kHz and operates across the industrial temperature range of -40°C to 125°C.

This part is discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

MIC2177-3.3BWM

Microchip TechnologyIn Stock: 697MIC2177-3.3BWM Datasheet

Current PartRFQ

MIC2177-5.0YWM

Microchip TechnologyIn Stock: 943MIC2177-5.0YWM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC2177-3.3BWM is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator
• Output Configuration: Positive fixed voltage
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Input Voltage Range: 4.5V to 16.5V
• Output Current Capability: 2.5A
• Switching Frequency: 200kHz
• Operating Temperature Range: -40°C to 125°C

The MIC2177-5.0YWM qualifies as a direct substitute within the MIC2177 product family. Both devices share identical mechanical packaging, electrical topology, input voltage specifications, output current rating, switching frequency, and operating temperature range. The primary difference is the fixed output voltage (5V versus 3.3V), which makes this part suitable only for applications requiring 5V output.

Parameter Comparison

Engineering Selection Recommendations

The MIC2177-5.0YWM is electrically and mechanically compatible with the MIC2177-3.3BWM for applications requiring a 5V output. Both devices are members of the same MIC2177 product family and share identical package geometry, input specifications, and current handling capabilities.

The MIC2177-5.0YWM offers improved regulatory compliance, meeting ROHS3 standards compared to the non-compliant status of the original part. However, both parts are now at end-of-life status. The MIC2177-5.0YWM carries a Moisture Sensitivity Level (MSL) of 2 with a 1-year shelf life requirement, whereas the MIC2177-3.3BWM has MSL 1 with unlimited shelf life.

Selection between these parts depends solely on output voltage requirements. The MIC2177-5.0YWM is appropriate only for designs requiring 5V output. For applications requiring 3.3V output, alternative sources or newer product families must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the MIC2177-5.0YWM be used as a direct replacement for the MIC2177-3.3BWM?

A: The MIC2177-5.0YWM is mechanically and electrically compatible only for applications requiring 5V output. The fixed output voltage difference (5V versus 3.3V) makes this substitution suitable only when the load circuit is designed for 5V operation. Direct pin-for-pin replacement is possible due to identical package geometry, but output voltage compatibility must be verified.

Q: Are there any package compatibility concerns?

A: Both parts use the 20-SOIC (0.295", 7.50mm Width) surface mount package. PCB footprints and land patterns are identical, allowing direct physical substitution without layout modifications.

Q: What is the significance of the RoHS compliance difference?

A: The MIC2177-3.3BWM is RoHS non-compliant, while the MIC2177-5.0YWM meets ROHS3 standards. For applications subject to RoHS regulations or customer requirements, the MIC2177-5.0YWM provides regulatory compliance. This difference does not affect electrical performance or functionality.

Q: How do the Moisture Sensitivity Levels differ?

A: The MIC2177-3.3BWM has MSL 1 (unlimited shelf life), while the MIC2177-5.0YWM has MSL 2 (1-year shelf life). MSL 2 components require controlled storage conditions and have a defined expiration date from the manufacturing date. This affects inventory management and handling procedures.

Q: What should be considered when both parts are discontinued?

A: Both the MIC2177-3.3BWM and MIC2177-5.0YWM are at end-of-life status. For new designs or long-term production requirements, evaluation of current-generation buck regulator ICs from Microchip Technology or alternative manufacturers is necessary to ensure sustained component availability.