MIC4429CT Equivalent & Substitute Parts

Part Overview

The MIC4429CT is a low-side gate driver IC in TO-220-5 packaging manufactured by Microchip Technology. It is designed to drive N-Channel and P-Channel MOSFETs with inverting logic configuration. The MIC4429CT is currently classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical electrical specifications and packaging are available from the same manufacturer.

Substiute Parts

MIC4429CT

Microchip TechnologyIn Stock: 733MIC4429CT Datasheet

Current PartRFQ

MIC4429ZT

Microchip TechnologyIn Stock: 1691MIC4429ZT Datasheet

DirectRFQ

TC4429CAT

Microchip TechnologyIn Stock: 1662TC4429CAT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MIC4429CT is determined by strict equivalence across the following critical parameters:

• Driven Configuration: Low-Side only
• Channel Type: Single channel
• Gate Type: N-Channel and P-Channel MOSFET support
• Input Type: Inverting logic
• Supply Voltage Range: 4.5V ~ 18V
• Logic Voltage Thresholds: VIL 0.8V, VIH 2.4V
• Peak Output Current: 6A source and sink capability
• Operating Temperature Range: 0°C ~ 150°C (TJ)
• Package: TO-220-5 through-hole mounting

Two substitute parts meet these criteria. The MIC4429ZT is an active product with identical electrical specifications and RoHS3 compliance. The TC4429CAT is the manufacturer-recommended alternative, also active and RoHS3 compliant, with a minor difference in rise/fall time performance.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production requiring a low-side gate driver IC with inverting logic in TO-220-5 packaging, the MIC4429ZT is the direct equivalent to the obsolete MIC4429CT. Both parts share identical electrical specifications, including rise/fall time performance of 12ns and 13ns respectively. The MIC4429ZT is active in production and carries RoHS3 compliance certification.

The TC4429CAT is the manufacturer-recommended alternative from Microchip Technology. It maintains all critical electrical parameters and supply voltage specifications. The TC4429CAT exhibits slower rise/fall time performance at 25ns, which may impact switching speed in time-critical applications but remains within the same functional category. The TC4429CAT is also active and RoHS3 compliant.

Both substitute parts are suitable for direct replacement in applications where the MIC4429CT was previously specified, provided that the rise/fall time difference in the TC4429CAT does not conflict with circuit timing requirements.

Frequently Asked Questions (FAQ)

Q: Can the MIC4429ZT be used as a direct replacement for the MIC4429CT?

A: Yes. The MIC4429ZT is electrically identical to the MIC4429CT across all specified parameters, including supply voltage range, logic thresholds, output current capability, and rise/fall time performance. Both use TO-220-5 through-hole packaging. The MIC4429ZT is active in production, whereas the MIC4429CT is obsolete.

Q: What is the difference between the MIC4429ZT and TC4429CAT?

A: Both parts are functionally equivalent low-side gate drivers with identical supply voltage, logic thresholds, and output current specifications. The primary difference is rise/fall time: MIC4429ZT operates at 12ns/13ns, while TC4429CAT operates at 25ns/25ns. This difference affects switching speed but does not change the fundamental gate driver function. Both are active products with RoHS3 compliance.

Q: Are all three parts pin-compatible?

A: Yes. The MIC4429CT, MIC4429ZT, and TC4429CAT all use TO-220-5 through-hole packaging with identical pinout, enabling direct board-level substitution without layout modifications.

Q: Which substitute part should I select for a new design?

A: The MIC4429ZT is recommended for new designs as it provides identical performance to the original MIC4429CT specification. If slower switching speed is acceptable for your application, the TC4429CAT is also a valid choice and is the manufacturer-recommended alternative.

Q: Are there any compliance differences between these parts?

A: The MIC4429CT is RoHS non-compliant. Both the MIC4429ZT and TC4429CAT are RoHS3 compliant. All three parts have REACH Unaffected status. For applications requiring RoHS compliance, either the MIC4429ZT or TC4429CAT must be used.