MIC58P42BWM Equivalent & Substitute Parts

Part Overview

The MIC58P42BWM is a Power Switch/Driver IC from Microchip Technology designed for 1:8 bipolar output applications with 500mA maximum output current. This component operates across a 4.5V to 15V load voltage range and features latched driver functionality with strobe and serial interface capabilities. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

MIC58P42BWM

Microchip TechnologyIn Stock: 1391MIC58P42BWM Datasheet

Current PartRFQ

MIC58P42YWM

Microchip TechnologyIn Stock: 2014MIC58P42YWM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MIC58P42YWM qualifies as a direct substitute for the MIC58P42BWM based on the following critical parameters:

Matching Parameters:

• Identical manufacturer (Microchip Technology)
• Same base product number (MIC58P42)
• Identical switch type (Latched Driver)
• Same output configuration (1:8 ratio, Low Side, Bipolar)
• Identical interface (Strobe, Serial)
• Same maximum output current (500mA)
• Identical operating temperature range (-55°C ~ 125°C)
• Identical package and mounting type (18-SOIC, Surface Mount)

Allowable Variations:

• Load voltage range: MIC58P42YWM operates 5V ~ 12V (subset of MIC58P42BWM's 4.5V ~ 15V range). This represents a narrower operating window but maintains compatibility for applications within the 5V to 12V band.
• Fault protection: MIC58P42YWM adds Current Limiting (Fixed) protection in addition to Over Temperature and UVLO, providing enhanced protection capability.
• Packaging format: MIC58P42YWM is supplied in Tube packaging versus Bulk for the original part; this affects procurement and handling only, not electrical function.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MIC58P42YWM

The MIC58P42YWM is the direct equivalent for the discontinued MIC58P42BWM. Selection criteria:

• Product Status: MIC58P42YWM is Active, ensuring long-term availability and supply chain continuity compared to the discontinued MIC58P42BWM.
• Compliance: MIC58P42YWM is ROHS3 Compliant, meeting current regulatory requirements. The original MIC58P42BWM is RoHS non-compliant, making the substitute preferable for new designs and updated production.
• Load Voltage Compatibility: The substitute operates within 5V ~ 12V. Applications requiring operation below 5V or above 12V must retain the original MIC58P42BWM or seek alternative solutions outside this product family.
• Enhanced Protection: The addition of Current Limiting (Fixed) protection in MIC58P42YWM provides improved fault tolerance without compromising electrical compatibility.
• Electrical Equivalence: All critical functional parameters—output configuration, current rating, interface, and thermal range—are identical, ensuring drop-in compatibility for qualifying applications.

Frequently Asked Questions (FAQ)

Q: Can MIC58P42YWM replace MIC58P42BWM in all applications?

A: MIC58P42YWM is electrically equivalent for applications operating within the 5V to 12V load voltage range. If your design requires operation below 5V or above 12V, the original MIC58P42BWM specifications must be maintained. Both parts are identical in all other critical parameters: output configuration, current rating, interface type, and thermal performance.

Q: What is the difference in packaging between these parts?

A: MIC58P42BWM is supplied in Bulk packaging, while MIC58P42YWM is supplied in Tube packaging. Both use the identical 18-SOIC (0.295", 7.50mm Width) physical package. The packaging format affects procurement, storage, and handling procedures but does not impact electrical performance or PCB assembly compatibility.

Q: Why does MIC58P42YWM have a narrower load voltage range?

A: MIC58P42YWM operates 5V ~ 12V versus the original 4.5V ~ 15V. This represents a design specification difference between the two part revisions. For applications requiring the full 4.5V to 15V range, the original MIC58P42BWM must be used. The overlapping 5V to 12V range supports direct substitution for most standard applications.

Q: What compliance advantages does MIC58P42YWM offer?

A: MIC58P42YWM is ROHS3 Compliant, meeting current environmental and regulatory standards. The original MIC58P42BWM is RoHS non-compliant. For new product designs, updated manufacturing processes, or markets with RoHS requirements, MIC58P42YWM is the appropriate selection.

Q: Does the additional Current Limiting protection in MIC58P42YWM affect circuit design?

A: No. The Current Limiting (Fixed) protection in MIC58P42YWM is an internal fault protection feature that enhances reliability without requiring circuit modifications. Existing designs using MIC58P42BWM will function identically with MIC58P42YWM, with the added benefit of improved protection against overcurrent conditions.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the identical temperature range (-55°C ~ 125°C) and deliver the same maximum output current (500mA). Thermal performance and electrical characteristics are equivalent.