MIC4428BN Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4428BN is a low-side gate driver IC manufactured by Microchip Technology, designed to drive N-Channel and P-Channel MOSFETs with independent dual-channel configuration. This 8-PDIP through-hole component operates across a 4.5V to 18V supply range with 1.5A peak output current capability on both source and sink paths.

The MIC4428BN is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and production continuity. Direct replacements and functionally compatible alternatives are available from Microchip Technology and other manufacturers, offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Driven Configuration	Low-Side
Channel Type	Independent
Number of Drivers	2
Gate Type	N-Channel, P-Channel MOSFET
Voltage - Supply	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.4V
Current - Peak Output (Source, Sink)	1.5A, 1.5A
Input Type	Inverting, Non-Inverting
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 150°C (TJ)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MIC4428BN is determined by the following critical parameters:

Primary Compatibility Criteria:

Driven Configuration: Low-Side
Channel Type: Independent
Number of Drivers: 2
Gate Type: N-Channel, P-Channel MOSFET
Package / Case: 8-DIP (0.300", 7.62mm)
Mounting Type: Through Hole

Electrical Compatibility Range:

Voltage - Supply: 4.5V minimum to 18V maximum
Logic Voltage - VIL, VIH: 0.8V to 2.4V
Current - Peak Output: Minimum 1.5A source and sink capability
Input Type: Inverting, Non-Inverting

Substitute parts are grouped into two categories:

Category 1: Direct Microchip Technology Equivalents Parts MIC4428YN and TC4428 series (TC4428CPA, TC4428EPA, TC4428VPA) maintain identical functional specifications with identical or superior electrical performance. These parts share the same base product architecture and pinout compatibility.

Category 2: Cross-Manufacturer Alternatives Parts from Analog Devices Inc./Maxim Integrated (MAX4428 series) and Texas Instruments/Unitrode (UCC27325P, UCC27425P, UCC37325P) provide functional equivalence with identical package, pinout, and core electrical parameters. These parts operate within the same supply voltage and output current specifications.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Peak Output Current (Source/Sink)	Rise/Fall Time (Typ)	Operating Temperature	Product Status	RoHS Status
MIC4428BN	Microchip Technology	4.5V ~ 18V	1.5A / 1.5A	20ns / 29ns	-40°C ~ 150°C (TJ)	Obsolete	RoHS non-compliant
MIC4428YN	Microchip Technology	4.5V ~ 18V	1.5A / 1.5A	20ns / 29ns	-40°C ~ 150°C (TJ)	Active	ROHS3 Compliant
TC4428CPA	Microchip Technology	4.5V ~ 18V	1.5A / 1.5A	25ns / 25ns	0°C ~ 70°C (TA)	Active	ROHS3 Compliant
TC4428EPA	Microchip Technology	4.5V ~ 18V	1.5A / 1.5A	19ns / 19ns	-40°C ~ 85°C (TA)	Active	ROHS3 Compliant
TC4428VPA	Microchip Technology	4.5V ~ 18V	1.5A / 1.5A	19ns / 19ns	-40°C ~ 125°C (TA)	Active	ROHS3 Compliant
MAX4428CPA+	Analog Devices Inc./Maxim Integrated	4.5V ~ 18V	1.5A / 1.5A	20ns / 20ns	0°C ~ 70°C (TA)	Active	ROHS3 Compliant
MAX4428EPA+	Analog Devices Inc./Maxim Integrated	4.5V ~ 18V	1.5A / 1.5A	20ns / 20ns	-40°C ~ 85°C (TA)	Active	ROHS3 Compliant
UCC27325P	Unitrode	4.5V ~ 15V	4A / 4A	20ns / 15ns	-55°C ~ 150°C (TJ)	Active	Not specified
UCC27425P	Texas Instruments	4V ~ 15V	4A / 4A	20ns / 15ns	-40°C ~ 125°C (TA)	Last Time Buy	ROHS3 Compliant
UCC37325P	Texas Instruments	4.5V ~ 15V	4A / 4A	20ns / 15ns	-55°C ~ 150°C (TJ)	Last Time Buy	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Direct Replacement: MIC4428YN is the primary equivalent for MIC4428BN. Both parts maintain identical electrical specifications and pinout compatibility. MIC4428YN carries Active product status and ROHS3 compliance, addressing the obsolescence and compliance limitations of the original part.

Microchip Technology TC4428 Series: TC4428EPA and TC4428VPA provide active alternatives with improved rise/fall time performance (19ns versus 20ns/29ns). TC4428EPA supports extended temperature operation to -40°C, matching the original part's lower temperature limit. TC4428VPA extends upper temperature operation to 125°C. All TC4428 variants are ROHS3 compliant and carry Active product status.

Cross-Manufacturer Alternatives: MAX4428EPA+ from Analog Devices Inc./Maxim Integrated provides functional equivalence with Active status and ROHS3 compliance. Operating temperature range extends to -40°C, suitable for extended temperature applications.

UCC27325P and UCC37325P from Texas Instruments/Unitrode offer higher peak output current capability (4A versus 1.5A) within identical package and pinout specifications. These parts are suitable for applications requiring enhanced drive capability. UCC27425P carries Last Time Buy status, indicating limited future availability.

Compliance Considerations: All recommended substitute parts carry ROHS3 compliance certification, addressing regulatory requirements not met by the obsolete MIC4428BN. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can MIC4428YN directly replace MIC4428BN without circuit modification? A: Yes. MIC4428YN maintains identical pinout, electrical specifications, and functional characteristics. No circuit modifications are required for direct substitution.

Q: What is the primary difference between TC4428CPA, TC4428EPA, and TC4428VPA? A: All three parts share identical electrical performance and pinout. The differences are operating temperature ranges: TC4428CPA operates 0°C to 70°C, TC4428EPA operates -40°C to 85°C, and TC4428VPA operates -40°C to 125°C. Select based on application temperature requirements.

Q: Are UCC27325P and UCC37325P pin-compatible with MIC4428BN? A: Yes. Both parts maintain 8-DIP package and pinout compatibility. However, UCC27325P and UCC37325P provide 4A peak output current versus 1.5A in MIC4428BN. This enhanced capability does not create incompatibility; circuits designed for 1.5A operation function correctly with higher-current parts.

Q: What is the significance of "Last Time Buy" status for UCC27425P and UCC37325P? A: Last Time Buy status indicates these parts are in final production phases with limited future availability. For new designs requiring long-term supply assurance, MIC4428YN or TC4428 series are preferred.

Q: Do all substitute parts meet RoHS compliance? A: MIC4428YN and all TC4428, MAX4428, UCC27425P, and UCC37325P variants carry ROHS3 compliance certification. UCC27325P compliance status is not specified in available documentation.

Q: Which substitute part offers the fastest switching performance? A: TC4428EPA and TC4428VPA provide the fastest rise/fall times at 19ns. MAX4428CPA+ and MAX4428EPA+ provide 20ns performance. UCC27325P, UCC27425P, and UCC37325P provide 20ns rise time with 15ns fall time.

Q: Can I use a higher-current gate driver (4A) in place of the 1.5A MIC4428BN? A: Yes. Higher output current capability provides design margin and improved switching performance without creating circuit incompatibility. UCC27325P, UCC27425P, and UCC37325P are suitable for applications where enhanced drive capability is beneficial.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message