MIC4427BMM Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4427BMM is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in non-inverting configuration. This device operates with a supply voltage range of 4.5V to 18V and delivers peak output current of 1.5A (source and sink). The MIC4427BMM is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	MIC4427BMM
Category	Power Management (PMIC)
Description	IC GATE DRVR LOW-SIDE 8MSOP
Driven Configuration	Low-Side
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	Non-Inverting
Rise / Fall Time (Typ)	20ns, 29ns
Operating Temperature	-40°C ~ 150°C (TJ)
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the MIC4427BMM is determined by the following critical parameters:

Primary Substitution Criteria:

Driven Configuration: Low-Side
Number of Drivers: 2
Gate Type: N-Channel, P-Channel MOSFET
Input Type: Non-Inverting
Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type: Surface Mount

Electrical Compatibility Parameters:

Voltage - Supply: 4.5V ~ 18V (minimum requirement)
Logic Voltage - VIL, VIH: 0.8V, 2.4V (minimum requirement)
Current - Peak Output (Source, Sink): 1.5A, 1.5A (minimum requirement)

Substitute parts must meet or exceed these electrical specifications and maintain identical functional configuration. Parts with higher supply voltage ranges, improved logic thresholds, or increased output current capability are electrically compatible. Operating temperature range and RoHS compliance status do not affect functional substitution but influence application suitability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Supply	Logic Voltage (VIL, VIH)	Current - Peak Output (Source, Sink)	Rise / Fall Time (Typ)	Operating Temperature	Package	RoHS Status	Product Status
MIC4427BMM	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 29ns	-40°C ~ 150°C (TJ)	8-MSOP	RoHS non-compliant	Discontinued
MIC4427YMM	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 29ns	-40°C ~ 150°C (TJ)	8-MSOP	ROHS3 Compliant	Active
TC4427AEUA	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	25ns, 25ns	-40°C ~ 85°C (TA)	8-MSOP	ROHS3 Compliant	Active
TC4427AEUA713	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	25ns, 25ns	-40°C ~ 85°C (TA)	8-MSOP	ROHS3 Compliant	Active
TC4427EUA	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	19ns, 19ns	-40°C ~ 85°C (TA)	8-MSOP	ROHS3 Compliant	Active
TC4427EUA713	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	19ns, 19ns	-40°C ~ 85°C (TA)	8-MSOP	ROHS3 Compliant	Active
TC4427VUA	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	19ns, 19ns	-40°C ~ 125°C (TA)	8-MSOP	ROHS3 Compliant	Active
TC4427VUA713	Microchip Technology	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	19ns, 19ns	-40°C ~ 125°C (TA)	8-MSOP	ROHS3 Compliant	Active
UCC27324DGN	Texas Instruments	4.5V ~ 15V	1V, 2V	4A, 4A	20ns, 15ns	-55°C ~ 150°C (TJ)	8-HVSSOP	ROHS3 Compliant	Last Time Buy
UCC27324DGNR	Texas Instruments	4.5V ~ 15V	1V, 2V	4A, 4A	20ns, 15ns	-55°C ~ 150°C (TJ)	8-HVSSOP	ROHS3 Compliant	Active
UCC37324DGN	Texas Instruments	4.5V ~ 15V	1V, 2V	4A, 4A	20ns, 15ns	-55°C ~ 150°C (TJ)	8-HVSSOP	ROHS3 Compliant	Last Time Buy

Engineering Selection Recommendations

Direct Replacement (Microchip Technology):

MIC4427YMM is the primary direct replacement for MIC4427BMM. Both parts share identical electrical specifications, package configuration, and functional characteristics. MIC4427YMM is currently active in production and ROHS3 compliant, addressing the discontinued status of the original part.

Microchip TC4427 Series (Active Alternatives):

TC4427AEUA, TC4427AEUA713, TC4427EUA, TC4427EUA713, TC4427VUA, and TC4427VUA713 are functionally equivalent low-side gate drivers from Microchip Technology. All maintain the required 4.5V to 18V supply voltage range, 0.8V/2.4V logic thresholds, and 1.5A peak output current. These parts differ in operating temperature range and packaging format (tube, cut tape, or tape & reel). TC4427VUA and TC4427VUA713 extend the operating temperature to -40°C to 125°C, providing enhanced thermal performance. All TC4427 variants are ROHS3 compliant and active in production.

Texas Instruments UCC27324 Series (Higher Performance Alternative):

UCC27324DGN, UCC27324DGNR, and UCC37324DGN deliver increased peak output current of 4A (source and sink), exceeding the 1.5A specification of MIC4427BMM. These parts maintain compatible supply voltage range (4.5V to 15V), non-inverting input configuration, and 8-pin package footprint. UCC27324DGNR is currently active; UCC27324DGN and UCC37324DGN are Last Time Buy status. The higher output current capability makes these parts suitable for applications requiring enhanced gate drive strength.

Compliance Considerations:

All substitute parts except MIC4427BMM are ROHS3 compliant. Applications requiring RoHS non-compliant components must retain MIC4427BMM or source remaining inventory of equivalent non-compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can MIC4427YMM directly replace MIC4427BMM without circuit modification?

A: Yes. MIC4427YMM is electrically and functionally identical to MIC4427BMM. Both parts operate at 4.5V to 18V supply voltage, deliver 1.5A peak output current, and use identical 8-MSOP package. The only difference is RoHS compliance status and active production availability.

Q: What is the difference between TC4427AEUA and TC4427EUA?

A: Both parts are functionally equivalent low-side gate drivers with identical electrical specifications. The primary difference is rise/fall time: TC4427AEUA specifies 25ns typical, while TC4427EUA specifies 19ns typical. TC4427EUA provides faster switching performance. Operating temperature range differs: TC4427AEUA operates to -40°C to 85°C, while TC4427EUA also operates to -40°C to 85°C but with MSL rating of 2 (1 Year) versus MSL 1 (Unlimited).

Q: Are UCC27324 parts compatible with MIC4427BMM designs?

A: UCC27324 parts are functionally compatible but deliver higher performance. They provide 4A peak output current versus 1.5A, enabling stronger gate drive capability. Supply voltage range is slightly reduced (4.5V to 15V versus 4.5V to 18V). Package footprint is 8-HVSSOP with exposed pad, requiring PCB layout verification for compatibility. Logic thresholds differ slightly (1V/2V versus 0.8V/2.4V).

Q: What packaging options are available for substitute parts?

A: Microchip TC4427 variants are available in tube, cut tape with Digi-Reel, and tape & reel packaging. MIC4427YMM is supplied in tube packaging. Texas Instruments UCC27324 and UCC37324 are available in tube and cut tape with Digi-Reel formats. Packaging selection does not affect electrical performance but influences procurement and assembly processes.

Q: Which substitute part offers the widest operating temperature range?

A: TC4427VUA and TC4427VUA713 extend operating temperature to -40°C to 125°C, compared to -40°C to 85°C for other TC4427 variants and -40°C to 150°C (junction temperature) for MIC4427BMM. Texas Instruments UCC27324 and UCC37324 specify -55°C to 150°C junction temperature, providing the widest temperature performance.

Q: Is inventory availability a factor in substitute selection?

A: Yes. MIC4427YMM has 9,590 units in stock. TC4427AEUA713 has 15,200 units. UCC27324DGNR has 40,801 units available. Availability should be evaluated against production volume and lead time requirements.

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