MIC59P50BWM Equivalent & Substitute Parts

Part Overview

The MIC59P50BWM is a Power Switch/Driver IC manufactured by Microchip Technology, designed for bipolar 1:1 switching applications with 500mA output capability in a 24-SOIC surface mount package. This component functions as a latched driver with 8 outputs, low-side output configuration, and integrated status flag and fault protection features including over-temperature and UVLO monitoring.

The MIC59P50BWM is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or when original inventory becomes unavailable. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

MIC59P50BWM

Microchip TechnologyIn Stock: 2595MIC59P50BWM Datasheet

Current PartRFQ

MIC59P50YWM

Microchip TechnologyIn Stock: 1554MIC59P50YWM Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC59P50BWM is determined by strict adherence to the following core parameters:

• Switch Type: Latched Driver (8 outputs, 1:1 ratio)
• Output Configuration: Low Side, Bipolar
• Interface: Strobe and Parallel control
• Current Rating: 500mA maximum output
• Package: 24-SOIC surface mount form factor
• Fault Protection: Over Temperature and UVLO capability
• Operating Temperature Range: -40°C to 85°C

The MIC59P50YWM qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Differences in load voltage range, additional current limiting protection, and compliance status do not affect functional substitutability within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The MIC59P50YWM is the qualified substitute for the obsolete MIC59P50BWM. Both components share identical electrical specifications for switch type, output configuration, current rating, and package form factor.

Selection between these parts should be based on:

• Product Status: The MIC59P50YWM maintains active production status, ensuring long-term availability and supply chain reliability compared to the obsolete MIC59P50BWM.
• Regulatory Compliance: The MIC59P50YWM is ROHS3 compliant with a 1-year moisture sensitivity level (MSL 2), whereas the MIC59P50BWM is RoHS non-compliant with unlimited moisture sensitivity (MSL 1). For applications subject to environmental or procurement regulations, the MIC59P50YWM is the appropriate choice.
• Enhanced Protection: The MIC59P50YWM includes fixed current limiting in addition to over-temperature and UVLO protection, providing additional fault tolerance without affecting pin compatibility or functional operation.

Frequently Asked Questions (FAQ)

Q: Can the MIC59P50YWM directly replace the MIC59P50BWM without PCB modifications?

A: Yes. Both components are housed in the 24-SOIC package with identical pinout, electrical specifications for output configuration, current rating, and control interface. No PCB layout changes are required for substitution.

Q: What is the significance of the load voltage difference between parts?

A: The MIC59P50BWM specifies a maximum load voltage of 15V, while the MIC59P50YWM operates within 5V to 12V. This difference reflects the tested operating envelope for each variant. For applications operating within the 5V to 12V range, both parts are functionally equivalent. Applications requiring 15V operation must retain the MIC59P50BWM or verify alternative solutions.

Q: Does the additional current limiting feature in the MIC59P50YWM affect compatibility?

A: No. Current limiting is an additional protective feature that does not alter the core switching function, output impedance, or control interface. The MIC59P50YWM remains pin-compatible and functionally compatible with designs originally specified for the MIC59P50BWM.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance indicates adherence to restrictions on hazardous substances in electrical and electronic equipment. The MIC59P50YWM's ROHS3 compliance status makes it suitable for applications and markets with environmental or procurement requirements that restrict non-compliant components. The MIC59P50BWM's non-compliant status may limit its use in regulated environments.

Q: What is the moisture sensitivity level (MSL) and why does it differ?

A: MSL indicates the maximum time a component can be stored in standard conditions before requiring baking prior to reflow soldering. The MIC59P50BWM (MSL 1) has unlimited shelf life, while the MIC59P50YWM (MSL 2) requires baking if stored longer than 1 year. For new production, the MIC59P50YWM's MSL 2 rating is standard and does not present practical limitations.