MIC38C45AYM Equivalent & Substitute Parts

Part Overview

The MIC38C45AYM is an active power management integrated circuit manufactured by Microchip Technology, classified as a multi-topology DC-DC controller. This device functions as a transistor driver supporting buck, boost, flyback, and forward converter topologies with positive, isolation-capable output configurations. The part is in active product status with 2900 units currently in stock. Alternative components are necessary when addressing supply chain constraints, packaging preferences, or specific operational temperature and voltage requirements across different application scenarios.

Substiute Parts

MIC38C45AYM

Microchip TechnologyIn Stock: 2998MIC38C45AYM Datasheet

Current PartRFQ

MIC38HC45YM

Microchip TechnologyIn Stock: 3317MIC38HC45YM Datasheet

Parametric EquivalentRFQ

UCC2801D

Texas InstrumentsIn Stock: 87870UCC2801D Datasheet

MFR RecommendedRFQ

UCC2801DTR

Texas InstrumentsIn Stock: 3698UCC2801DTR Datasheet

MFR RecommendedRFQ

UCC2801MDREP

Texas InstrumentsIn Stock: 5903UCC2801MDREP Datasheet

MFR RecommendedRFQ

UCC2801QDREP

Texas InstrumentsIn Stock: 3236UCC2801QDREP Datasheet

MFR RecommendedRFQ

UCC2801QDRQ1

Texas InstrumentsIn Stock: 5571UCC2801QDRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC38C45AYM is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — mandatory for mechanical and electrical compatibility
• Mounting Type: Surface Mount — required for PCB assembly compatibility
• Output Type: Transistor Driver — functional requirement for controller operation
• Topology Support: Buck, Boost, Flyback, Forward Converter — application-specific requirement
• Output Configuration: Positive, Isolation Capable — electrical interface requirement
• RoHS Status: ROHS3 Compliant — regulatory compliance requirement
• Moisture Sensitivity Level: 1 (Unlimited) — handling and storage compatibility

Secondary Consideration Parameters:

• Voltage - Supply range overlap or compatibility
• Operating Temperature range (may extend beyond original specification)
• Duty Cycle maximum rating
• Synchronous Rectifier capability

Substitute parts must maintain identical package geometry, mounting methodology, and functional topology support. Voltage supply ranges may differ provided the application operating point falls within the substitute part's specified range. Operating temperature ranges may be extended without affecting substitution validity.

Parameter Comparison

Engineering Selection Recommendations

Microchip Technology MIC38HC45YM — Direct parametric equivalent to MIC38C45AYM with identical electrical specifications, voltage supply range, and operating temperature limits. Both parts maintain the same 8-SOIC package geometry and functional topology support. Selection between MIC38C45AYM and MIC38HC45YM depends solely on inventory availability and packaging format preference (tube vs. alternative formats).

Texas Instruments UCC2801 Series (UCC2801D, UCC2801DTR, UCC2801MDREP, UCC2801QDREP, UCC2801QDRQ1) — These parts function as multi-topology PWM controllers in identical 8-SOIC packages. All variants maintain ROHS3 compliance and MSL 1 rating. Key differences exist in voltage supply range specifications and operating temperature ranges:

• UCC2801D, UCC2801DTR, UCC2801QDRQ1: 7.4V ~ 11V supply range, -40°C ~ 125°C operating temperature
• UCC2801MDREP: 7.4V ~ 12V supply range, -55°C ~ 125°C operating temperature (extended low-temperature capability)
• UCC2801QDREP: 7.4V ~ 12V supply range, -40°C ~ 125°C operating temperature

The UCC2801QDRQ1 variant includes automotive-grade qualification (AEC-Q100) and is suitable for applications requiring automotive reliability standards.

Voltage Supply Compatibility: Applications operating within the 7.4V ~ 11V window are compatible with all UCC2801 variants. Applications requiring supply voltages above 11V but within the MIC38C45AYM specification (up to 20V) are not suitable for standard UCC2801 substitution without circuit redesign.

Temperature Range Considerations: The MIC38C45AYM operates to 85°C maximum. All UCC2801 variants extend operation to 125°C, providing thermal margin in high-temperature environments. The UCC2801MDREP extends the lower operating limit to -55°C for extreme cold-temperature applications.

Packaging Format: UCC2801D and UCC2801DTR differ in packaging format (tube vs. cut tape/digi-reel). UCC2801MDREP, UCC2801QDREP, and UCC2801QDRQ1 are supplied in tape & reel format. Selection depends on procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can MIC38C45AYM be directly replaced with MIC38HC45YM?

A: Yes. Both parts share identical electrical specifications, package geometry (8-SOIC), mounting type (surface mount), and functional topology support. Substitution is valid without circuit modification. Selection depends on inventory availability and packaging format preference.

Q: Are UCC2801 series parts direct replacements for MIC38C45AYM?

A: UCC2801 series parts are functionally compatible as multi-topology PWM controllers in the same 8-SOIC package. However, voltage supply range differences require verification. The MIC38C45AYM supports 7.6V ~ 20V, while standard UCC2801 variants support 7.4V ~ 11V or 7.4V ~ 12V. Applications operating above 11V require circuit redesign or selection of alternative components. Applications within the 7.4V ~ 11V window are directly compatible.

Q: What is the difference between UCC2801MDREP and UCC2801QDREP?

A: Both parts operate within 7.4V ~ 12V supply range and share identical 8-SOIC packaging. The primary difference is operating temperature range: UCC2801MDREP extends to -55°C minimum (vs. -40°C for UCC2801QDREP). Selection depends on application temperature requirements. UCC2801MDREP is preferred for extreme cold-temperature environments.

Q: Is UCC2801QDRQ1 suitable for automotive applications?

A: Yes. UCC2801QDRQ1 carries automotive-grade qualification (AEC-Q100) and is designated for automotive applications. This variant is appropriate when automotive reliability standards are required. Non-automotive variants (UCC2801D, UCC2801DTR, UCC2801MDREP, UCC2801QDREP) do not carry automotive qualification.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. MIC38HC45YM and all UCC2801 variants (UCC2801D, UCC2801DTR, UCC2801MDREP, UCC2801QDREP, UCC2801QDRQ1) are ROHS3 compliant. All parts maintain MSL 1 (unlimited moisture sensitivity level) rating, ensuring equivalent handling and storage requirements.

Q: What packaging formats are available for UCC2801 series?

A: UCC2801D is supplied in tube packaging. UCC2801DTR is supplied in cut tape & digi-reel format. UCC2801MDREP, UCC2801QDREP, and UCC2801QDRQ1 are supplied in tape & reel format. Selection depends on procurement volume and assembly line requirements.

Q: Can MIC38C45AYM be used in applications requiring -55°C minimum operating temperature?

A: No. MIC38C45AYM operates to -40°C minimum. Applications requiring -55°C operation require UCC2801MDREP, which extends the lower operating limit to -55°C. This substitution is valid provided the application voltage supply remains within 7.4V ~ 12V range.