MIC4425BM Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4425BM is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in power management applications. This device features independent dual-channel configuration with inverting and non-inverting input types, operating across a 4.5V to 18V supply voltage range with 3A peak output current capability.

The MIC4425BM is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from Microchip Technology's active product lines, offering compatible or enhanced electrical and mechanical specifications for direct replacement or design optimization.

Key Parameters

Parameter	MIC4425BM Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Description	IC GATE DRVR LOW-SIDE 8SOIC
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)	3A, 3A
Input Type	Inverting, Non-Inverting
Rise / Fall Time (Typ)	28ns, 32ns
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MIC4425BM are grouped based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

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
Input Type: Inverting, Non-Inverting
Package / Case: 8-SOIC (0.154", 3.90mm Width)

Secondary Performance Parameters (Allow Variation):

Current - Peak Output: MIC4425BM provides 3A; substitutes provide 1.5A (reduced capability)
Rise / Fall Time: MIC4425BM provides 28ns/32ns; substitutes provide 25ns or 30ns (acceptable variation)
Operating Temperature: MIC4425BM operates -40°C ~ 150°C (TJ); substitutes operate at -40°C ~ 85°C (TA) or 0°C ~ 70°C (TA) (narrower range acceptable for most applications)

All substitute parts maintain the same 8-SOIC package footprint, supply voltage range, logic voltage thresholds, and dual-channel independent configuration. Substitutes are available in active product status with RoHS3 compliance.

Parameter Comparison

Parameter	MIC4425BM	MIC4425YM	TC428COA	TC428EOA	TC4428ACOA	TC4428ACOA713	TC4428AEOA	TC4428AEOA713	TC4428AVOA	TC4428COA	TC4428COA713
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2	2	2	2	2
Gate Type	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET
Voltage - Supply	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V
Current - Peak Output (Source, Sink)	3A, 3A	3A, 3A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A
Input Type	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting
Rise / Fall Time (Typ)	28ns, 32ns	28ns, 32ns	30ns, 30ns	30ns, 30ns	25ns, 25ns	25ns, 25ns	25ns, 25ns	25ns, 25ns	25ns, 25ns	25ns, 25ns	25ns, 25ns
Operating Temperature	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Highest Compatibility): MIC4425YM is the direct equivalent to MIC4425BM, maintaining identical electrical specifications including 3A peak output current and 28ns/32ns rise/fall times. Both parts operate across the full -40°C to 150°C temperature range. The primary difference is packaging format (Tube vs. Bulk) and RoHS3 compliance status of MIC4425YM. This part is recommended for applications requiring exact electrical performance match and is currently in active production status.

Functional Substitutes (Reduced Output Current): TC4428 series parts (TC428COA, TC428EOA, TC4428ACOA, TC4428ACOA713, TC4428AEOA, TC4428AEOA713, TC4428AVOA, TC4428COA, TC4428COA713) are functionally compatible substitutes with the following considerations:

All TC4428 variants reduce peak output current from 3A to 1.5A (50% reduction)
All maintain 4.5V to 18V supply voltage range and 0.8V/2.4V logic thresholds
Rise/fall times improve to 25ns or 30ns (faster switching)
Operating temperature ranges vary: TC4428AVOA extends to -40°C ~ 125°C; TC428EOA and TC4428AEOA extend to -40°C ~ 85°C; TC428COA and TC4428ACOA operate 0°C ~ 70°C
All substitute parts are RoHS3 compliant and in active production status
Packaging options include Tube and Cut Tape (CT) & Digi-Reel® formats

Selection Criteria by Application:

Applications requiring 3A output current: Select MIC4425YM
Applications tolerating 1.5A output current with extended temperature range (-40°C ~ 125°C): Select TC4428AVOA
Applications tolerating 1.5A output current with extended temperature range (-40°C ~ 85°C): Select TC4428AEOA or TC4428AEOA713
Applications with standard industrial temperature range (0°C ~ 70°C): Select TC4428COA, TC4428COA713, TC4428ACOA, or TC4428ACOA713
High-volume applications requiring tape-and-reel packaging: Select TC4428ACOA713, TC4428AEOA713, or TC4428COA713

Frequently Asked Questions (FAQ)

Q: Can TC4428 series parts directly replace MIC4425BM in existing designs? A: TC4428 series parts are functionally compatible for applications where 1.5A peak output current is sufficient. The reduced output current is the primary design consideration. All other electrical parameters (supply voltage, logic thresholds, input types, package footprint) are identical. Thermal performance and switching speed may improve due to faster rise/fall times.

Q: What is the difference between MIC4425BM and MIC4425YM? A: MIC4425YM is the active production equivalent of the discontinued MIC4425BM. Both parts have identical electrical specifications (3A output current, 28ns/32ns rise/fall times, -40°C ~ 150°C operating range). The primary differences are packaging format (MIC4425YM supplied in Tube; MIC4425BM was supplied in Bulk) and RoHS compliance status (MIC4425YM is RoHS3 compliant).

Q: Are all substitute parts available in the same 8-SOIC package? A: Yes. All substitute parts listed use the 8-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB footprint compatibility. Packaging format varies (Tube or Cut Tape & Digi-Reel®) but the physical component package remains unchanged.

Q: What is the impact of reduced output current (3A to 1.5A) on circuit performance? A: Output current reduction affects gate drive capability. Lower output current increases gate charge time, potentially slowing MOSFET switching speed. Applications with high-frequency switching or large gate capacitance may experience performance degradation. Verify that 1.5A output current is sufficient for your MOSFET gate charge requirements before substitution.

Q: Which substitute part offers the widest operating temperature range? A: TC4428AVOA operates across -40°C ~ 125°C (TA), providing the widest temperature range among substitutes. This part is suitable for high-temperature industrial applications. MIC4425YM maintains the original -40°C ~ 150°C (TJ) range but with reduced availability compared to TC4428 variants.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant. The original MIC4425BM is RoHS non-compliant. If RoHS compliance is a design requirement, MIC4425YM or any TC4428 variant satisfies this requirement.

Q: What packaging options are available for high-volume production? A: Cut Tape (CT) & Digi-Reel® packaging is available for TC4428ACOA713, TC4428AEOA713, and TC4428COA713, supporting automated assembly processes. Tube packaging is available for all other variants. Select the appropriate packaging format based on production volume and assembly equipment compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message