TC428EUA Equivalent & Substitute Parts

Part Overview

The TC428EUA is a low-side gate driver IC manufactured by Microchip Technology, designed to drive N-Channel and P-Channel MOSFETs with independent inverting and non-inverting input configurations. The device operates from a 4.5V to 18V supply with 1.5A peak output current capability in both source and sink modes.

The TC428EUA is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term production requirements. Active alternatives with compatible electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

TC428EUA

Microchip TechnologyIn Stock: 1022TC428EUA Datasheet

Current PartRFQ

MIC4128YMME

Microchip TechnologyIn Stock: 2673MIC4128YMME Datasheet

MFR RecommendedRFQ

MIC4128YMME-TR

Microchip TechnologyIn Stock: 2014MIC4128YMME-TR Datasheet

MFR RecommendedRFQ

MIC4428YMM

Microchip TechnologyIn Stock: 35791MIC4428YMM Datasheet

MFR RecommendedRFQ

MIC4428YMM-TR

Microchip TechnologyIn Stock: 1767MIC4428YMM-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC428EUA is determined by the following critical parameters:

• Driven Configuration: Low-Side
• Number of Drivers: 2 Independent channels
• Gate Type: N-Channel and/or P-Channel MOSFET compatibility
• Voltage - Supply: Minimum 4.5V, Maximum 18V or higher
• Current - Peak Output: 1.5A source and sink capability
• Input Type: Inverting and Non-Inverting configurations
• Package / Case: 8-MSOP form factor with 0.118" (3.00mm) width
• Mounting Type: Surface Mount

Substitute parts must maintain compatibility across all these parameters. The TC428EUA has four direct substitutes from Microchip Technology's MIC4128 and MIC4428 product lines, all available in active production status with improved or equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are manufactured by Microchip Technology and maintain active production status, ensuring long-term supply chain availability compared to the obsolete TC428EUA.

MIC4428YMM and MIC4428YMM-TR are the primary recommended substitutes. These parts maintain identical supply voltage range (4.5V ~ 18V) and gate type compatibility (N-Channel and P-Channel MOSFET) with the TC428EUA. Both offer extended operating temperature ranges up to 150°C (TJ) and MSL 1 rating (unlimited moisture sensitivity), matching the original part's environmental specifications. The MIC4428YMM is supplied in tube packaging, while MIC4428YMM-TR is supplied in cut tape and Digi-Reel format for automated assembly.

MIC4128YMME and MIC4128YMME-TR are alternative substitutes with enhanced electrical performance. These parts feature faster rise and fall times (20ns, 18ns) and extended supply voltage range to 20V. However, they are specified for N-Channel MOSFET gate driving only and carry MSL 3 rating (168 hours moisture sensitivity), requiring controlled storage conditions. These parts are suitable for applications where P-Channel MOSFET driving is not required and where the extended voltage range provides design margin.

All substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory compliance with the original TC428EUA.

Frequently Asked Questions (FAQ)

Q: Can MIC4128YMME replace TC428EUA in all applications?

A: MIC4128YMME is electrically compatible for low-side gate driving with 1.5A output current and identical logic voltage thresholds. However, it is specified for N-Channel MOSFET driving only. If your design requires P-Channel MOSFET gate driving, use MIC4428YMM or MIC4428YMM-TR instead.

Q: What is the difference between MIC4428YMM and MIC4428YMM-TR?

A: Both parts are electrically identical. MIC4428YMM is supplied in tube packaging for manual handling and small-volume assembly. MIC4428YMM-TR is supplied in cut tape and Digi-Reel format for automated pick-and-place assembly. Select based on your manufacturing process requirements.

Q: Why do MIC4128 parts have MSL 3 rating while TC428EUA has MSL 1?

A: MSL 3 (168 hours) indicates stricter moisture control requirements during storage and handling compared to MSL 1 (unlimited). If your supply chain or storage conditions cannot maintain MSL 3 specifications, use MIC4428YMM or MIC4428YMM-TR, which maintain MSL 1 rating.

Q: Are the MIC4128 parts suitable for higher voltage applications?

A: MIC4128YMME and MIC4128YMME-TR support supply voltage up to 20V, compared to 18V maximum for TC428EUA and MIC4428 parts. This extended range provides additional design margin in applications with variable supply voltages. However, confirm that your circuit design does not exceed 18V if using MIC4428 substitutes.

Q: What is the significance of the exposed pad on MIC4128 packages?

A: The 8-MSOP-EP package includes an exposed thermal pad for improved heat dissipation. This is beneficial in high-frequency switching applications where gate driver power dissipation is significant. Standard 8-MSOP packages (MIC4428 and TC428EUA) do not include this feature.

Q: Can I use these substitutes in existing PCB designs without layout modifications?

A: All substitute parts use identical 8-MSOP package footprint (0.118", 3.00mm width) and pin configuration. PCB layout modifications are not required. However, if selecting MIC4128 parts with exposed pad, ensure your PCB design includes thermal via patterns to utilize the exposed pad for heat dissipation.