MIC2171BU Equivalent & Substitute Parts

Part Overview

The MIC2171BU is a multi-configuration adjustable switching regulator IC from Microchip Technology, designed for power management applications. It supports multiple converter topologies including Buck, Boost, Cuk, Flyback, and Forward Converter configurations, with a maximum output current of 2.5A and input voltage range of 3V to 40V. The part is currently classified as Obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MIC2171BU

Microchip TechnologyIn Stock: 7180MIC2171BU Datasheet

Current PartRFQ

MIC2171WU

Microchip TechnologyIn Stock: 5513MIC2171WU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC2171BU is determined by strict equivalence across the following critical parameters:

• Input voltage range: 3V to 40V
• Output current capability: 2.5A (Switch)
• Maximum output voltage: 65V (Switch)
• Switching frequency: 100kHz
• Supported topologies: Buck, Boost, Cuk, Flyback, Forward Converter
• Output configuration: Positive or Negative, Isolation Capable
• Package type: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
• Operating temperature range: -40°C ~ 85°C (TA)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The MIC2171WU is identified as a direct substitute based on identical electrical specifications and mechanical compatibility across all parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

The MIC2171WU is the primary substitute for the obsolete MIC2171BU. Both parts share identical electrical and mechanical specifications, including input/output voltage ranges, current ratings, switching frequency, and package configuration. The MIC2171WU maintains Active product status, ensuring continued availability and manufacturing support from Microchip Technology. Both parts comply with ROHS3 and REACH requirements, with equivalent moisture sensitivity ratings. Direct substitution is supported without circuit modification when electrical parameters and package footprint requirements are met.

Frequently Asked Questions (FAQ)

Q: Can the MIC2171WU be used as a direct replacement for the MIC2171BU?

A: Yes. The MIC2171WU is electrically and mechanically equivalent to the MIC2171BU across all specified parameters, including input voltage range (3V–40V), output current (2.5A), maximum output voltage (65V), switching frequency (100kHz), supported topologies, and package type (TO-263-6, D2PAK).

Q: What is the primary difference between these two parts?

A: The MIC2171BU is classified as Obsolete, while the MIC2171WU maintains Active product status. This distinction affects long-term availability and manufacturing support from Microchip Technology.

Q: Are there any packaging differences between MIC2171BU and MIC2171WU?

A: Both parts use identical package specifications: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA. The MIC2171WU is supplied in Tube packaging, while the MIC2171BU packaging type was not specified in the original documentation.

Q: Do both parts support the same converter topologies?

A: Yes. Both the MIC2171BU and MIC2171WU support Buck, Boost, Cuk, Flyback, and Forward Converter topologies with identical output configuration capabilities (Positive or Negative, Isolation Capable).

Q: Are there compliance or certification differences?

A: No. Both parts maintain identical compliance status: ROHS3 Compliant, REACH Unaffected, with equivalent Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours).