MIC38C45-1YM Equivalent & Substitute Parts

Part Overview

The MIC38C45-1YM is a Buck, Boost, Flyback, and Forward Converter Regulator from Microchip Technology, functioning as a multi-topology DC-DC controller IC in a 14-SOIC package. This component operates as a transistor driver with step-up, step-down, and step-up/step-down capabilities, supporting positive and isolation-capable output configurations. The part is currently active in production with 18,185 units in stock. Substitute parts are necessary when addressing supply constraints, design revisions requiring alternative manufacturers, or when specific compliance certifications become critical for end-application requirements.

Substiute Parts

MIC38C45-1YM

Microchip TechnologyIn Stock: 18204MIC38C45-1YM Datasheet

Current PartRFQ

MIC38HC45-1YM

Microchip TechnologyIn Stock: 731MIC38HC45-1YM Datasheet

Parametric EquivalentRFQ

UC2845D

onsemiIn Stock: 1673UC2845D Datasheet

MFR RecommendedRFQ

UC2845DTR

Texas InstrumentsIn Stock: 3651UC2845DTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC38C45-1YM is determined by the following critical parameters:

Primary Substitution Criteria:

• Package compatibility: 14-SOIC form factor (0.154", 3.90mm Width)
• Operating temperature range: -40°C ~ 85°C (TA)
• Output type: Transistor Driver
• Topology support: Buck, Boost, Flyback, Forward Converter capability
• Supply voltage range: 7.6V ~ 20V minimum overlap

Substitute Parts Identified:

1. MIC38HC45-1YM (Microchip Technology) — Parametric equivalent with identical topology, supply voltage, temperature range, and package. Switching frequency specification not provided in substitute data.

2. UC2845D (onsemi) — Manufacturer-recommended alternative with matching 14-SOIC package and operating temperature range. Product status is obsolete; RoHS non-compliant.

3. UC2845DTR (Texas Instruments) — Manufacturer-recommended alternative with matching 14-SOIC package, operating temperature range, and active product status. ROHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

MIC38HC45-1YM — Direct parametric equivalent from Microchip Technology. Maintains identical supply voltage range (7.6V ~ 20V), operating temperature (-40°C ~ 85°C), package form factor (14-SOIC), and topology support. Both parts are ROHS3 compliant and active in production. This substitute provides the highest compatibility assurance for direct replacement applications.

UC2845DTR — Texas Instruments alternative suitable for applications where multi-source qualification is required. Maintains 14-SOIC package, -40°C ~ 85°C operating temperature, and ROHS3 compliance. Product status is active. Electrical parameter specifications differ from the primary part; verification against application requirements is necessary.

UC2845D — onsemi option available with 1,600 units in stock. Product status is obsolete and RoHS non-compliant. This substitute is suitable only for legacy system maintenance or applications where RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can MIC38HC45-1YM directly replace MIC38C45-1YM in production designs?

A: Yes. Both parts share identical supply voltage range (7.6V ~ 20V), operating temperature (-40°C ~ 85°C), 14-SOIC package, duty cycle maximum (50%), and ROHS3 compliance. Both are active products from Microchip Technology.

Q: What are the key differences between UC2845DTR and the primary MIC38C45-1YM?

A: Both maintain 14-SOIC packaging and -40°C ~ 85°C operating temperature. UC2845DTR is manufactured by Texas Instruments and is ROHS3 compliant with active product status. Specific electrical parameters (switching frequency, supply voltage range, duty cycle) are not provided in the substitute data and must be verified against application requirements.

Q: Is UC2845D suitable for new designs?

A: UC2845D carries obsolete product status and is RoHS non-compliant. This part is appropriate only for legacy system support or applications where RoHS compliance is not required. For new designs, MIC38HC45-1YM or UC2845DTR are preferred.

Q: Are all substitute parts available in 14-SOIC packaging?

A: Yes. All listed substitutes—MIC38HC45-1YM, UC2845D, and UC2845DTR—are packaged in 14-SOIC (0.154", 3.90mm Width) form factor, ensuring mechanical compatibility with existing PCB layouts.

Q: What compliance certifications apply to each substitute?

A: MIC38C45-1YM and MIC38HC45-1YM are ROHS3 compliant. UC2845DTR is ROHS3 compliant. UC2845D is RoHS non-compliant. All parts carry EAR99 ECCN classification and HTSUS code 8542.39.0001.