MIC4420CM Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4420CM is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in 8-SOIC surface mount packaging. This device is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for new designs and production continuity. The MIC4420CM operates with a supply voltage range of 4.5V to 18V and delivers peak output current of 6A source and 6A sink, making it suitable for moderate-power switching applications.

Key Parameters

Parameter	MIC4420CM Value
Driven Configuration	Low-Side
Channel Type	Single
Number of Drivers	1
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)	6A, 6A
Input Type	Non-Inverting
Rise / Fall Time (Typ)	12ns, 13ns
Operating Temperature	0°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MIC4420CM is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Driven Configuration: Low-Side operation required
Channel Type: Single channel
Gate Type: N-Channel and P-Channel MOSFET compatibility
Voltage - Supply: Minimum 4.5V to 18V range coverage
Logic Voltage: VIL ≤ 0.8V and VIH ≥ 2.4V
Current - Peak Output: Minimum 6A source and 6A sink capability
Input Type: Non-Inverting logic
Package / Case: 8-SOIC form factor
Mounting Type: Surface Mount

Substitute Categories:

Category 1: Direct Microchip Technology Equivalents (Same Base Product)

MIC4420ZM: Identical electrical specifications with RoHS3 compliance and active product status

Category 2: Microchip Technology High-Side/Low-Side Alternatives (Expanded Capability)

TC4432COA, TC4432EOA, TC4432EOA713: Support both high-side and low-side configurations with extended supply voltage range (4.5V ~ 30V), though with reduced peak output current (1.5A source/sink) and slower switching times

Category 3: Renesas Electronics Low-Side Equivalents

EL7104CSZ, EL7104CSZ-T7: Low-side configuration with reduced supply voltage range (4.5V ~ 16V), reduced peak output current (4A source/sink), but faster switching performance (7.5ns/10ns rise/fall times)

Category 4: Analog Devices/Maxim Integrated Low-Side Equivalents

MAX4420CSA+, MAX4420ESA+, MAX4420ESA+T: Identical electrical specifications to MIC4420CM with RoHS3 compliance and active product status, varying only in operating temperature range and packaging format

Category 5: Texas Instruments Alternative (Inverting Logic)

UCC27321D: Low-side configuration with inverting input logic, higher peak output current (9A source/sink), but narrower supply voltage range (4V ~ 15V) and different logic voltage thresholds

Parameter Comparison

Parameter	MIC4420CM	MIC4420ZM	TC4432COA	TC4432EOA	TC4432EOA713	EL7104CSZ	EL7104CSZ-T7	MAX4420CSA+	MAX4420ESA+	MAX4420ESA+T	UCC27321D
Driven Configuration	Low-Side	Low-Side	High/Low-Side	High/Low-Side	High/Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Channel Type	Single	Single	Single	Single	Single	Single	Single	Single	Single	Single	Single
Gate Type	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch	N-Ch, P-Ch
Voltage - Supply	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 30V	4.5V ~ 30V	4.5V ~ 30V	4.5V ~ 16V	4.5V ~ 16V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4V ~ 15V
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	1.1V, 2.7V
Current - Peak Output (Source, Sink)	6A, 6A	6A, 6A	1.5A, 1.5A	1.5A, 1.5A	1.5A, 1.5A	4A, 4A	4A, 4A	6A, 6A	6A, 6A	6A, 6A	9A, 9A
Input Type	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Inverting
Rise / Fall Time (Typ)	12ns, 13ns	12ns, 13ns	25ns, 33ns	25ns, 33ns	25ns, 33ns	7.5ns, 10ns	7.5ns, 10ns	25ns, 25ns	25ns, 25ns	25ns, 25ns	20ns, 20ns
Operating Temperature	0°C ~ 150°C (TJ)	0°C ~ 150°C (TJ)	0°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 105°C (TA)
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	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	Active	Active	Active	Active	Active	Active	Active	Active	Active	Last Time Buy

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended for New Designs):

MIC4420ZM is the primary recommended substitute. It maintains identical electrical specifications to the MIC4420CM while offering active product status and RoHS3 compliance. This part provides seamless drop-in compatibility with existing circuit designs without modification.

MAX4420ESA+ and MAX4420ESA+T from Analog Devices/Maxim Integrated are functionally equivalent alternatives with identical electrical performance, active product status, and RoHS3 compliance. These parts are suitable when Microchip sourcing is constrained.

Tier 2 - Functional Equivalents with Trade-offs:

EL7104CSZ and EL7104CSZ-T7 from Renesas Electronics provide low-side gate driving with faster switching performance (7.5ns/10ns rise/fall times) but operate within a narrower supply voltage range (4.5V ~ 16V) and deliver reduced peak output current (4A source/sink). These parts are suitable for applications where the reduced supply voltage and current ratings are acceptable and faster switching is beneficial.

Tier 3 - Limited Compatibility:

TC4432COA, TC4432EOA, and TC4432EOA713 support both high-side and low-side configurations with extended supply voltage capability (4.5V ~ 30V). However, these parts deliver significantly reduced peak output current (1.5A source/sink) and slower switching times (25ns/33ns rise/fall times), making them unsuitable for applications requiring the 6A output current of the MIC4420CM.

UCC27321D from Texas Instruments features inverting input logic and higher peak output current (9A source/sink) but operates within a narrower supply voltage range (4V ~ 15V) and has different logic voltage thresholds (1.1V, 2.7V). Circuit redesign is required to accommodate the inverting logic configuration. This part is in Last Time Buy status.

Frequently Asked Questions (FAQ)

Q: Can I use MIC4420ZM as a direct replacement for MIC4420CM?

A: Yes. MIC4420ZM is electrically identical to MIC4420CM with matching supply voltage range (4.5V ~ 18V), peak output current (6A source/sink), logic voltage thresholds (0.8V, 2.4V), and switching times (12ns/13ns). The primary differences are active product status and RoHS3 compliance. No circuit modifications are required.

Q: What are the key differences between the Microchip low-side drivers (MIC4420) and the Microchip high-side/low-side drivers (TC4432)?

A: The TC4432 series supports both high-side and low-side configurations with extended supply voltage range (4.5V ~ 30V). However, the TC4432 delivers only 1.5A peak output current compared to 6A for the MIC4420, and exhibits slower switching times (25ns/33ns versus 12ns/13ns). The TC4432 is suitable only for applications where the reduced current and slower switching are acceptable.

Q: Why does the EL7104CSZ have a narrower supply voltage range than the MIC4420CM?

A: The EL7104CSZ from Renesas Electronics is specified for 4.5V ~ 16V operation, which is narrower than the MIC4420CM range of 4.5V ~ 18V. Applications requiring operation above 16V supply voltage cannot use the EL7104CSZ without circuit redesign or voltage regulation modifications.

Q: Can I use UCC27321D as a substitute for MIC4420CM?

A: UCC27321D is not recommended as a direct substitute due to inverting input logic. The MIC4420CM uses non-inverting logic, while UCC27321D inverts the input signal. Circuit redesign is required to accommodate this logic inversion. Additionally, UCC27321D operates within a narrower supply voltage range (4V ~ 15V) and has different logic voltage thresholds (1.1V, 2.7V).

Q: What is the significance of RoHS3 compliance for gate driver selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The MIC4420CM is RoHS non-compliant, while all recommended substitutes (MIC4420ZM, MAX4420 series, EL7104 series, TC4432 series) are RoHS3 compliant. For new designs and applications subject to RoHS requirements, RoHS3 compliant parts are mandatory.

Q: Are all substitute parts available in 8-SOIC packaging?

A: Yes. All substitute parts listed are available in 8-SOIC (0.154", 3.90mm Width) surface mount packaging, matching the MIC4420CM package footprint. Packaging variants (Tube, Tape & Reel, Cut Tape) differ by supplier but do not affect electrical compatibility or PCB layout.

Q: What is the operating temperature difference between MIC4420CM and MAX4420ESA+?

A: MIC4420CM is specified for 0°C ~ 150°C junction temperature (TJ), while MAX4420ESA+ is specified for -40°C ~ 85°C ambient temperature (TA). The different temperature measurement points (junction versus ambient) and ranges reflect different thermal specifications. For applications requiring operation above 85°C ambient or 150°C junction temperature, verify thermal management and derating requirements.

Q: Can I substitute multiple parts interchangeably in the same design?

A: No. While MIC4420ZM and MAX4420ESA+ are electrically equivalent and interchangeable, other substitutes have different electrical characteristics. EL7104CSZ has reduced current capability and narrower voltage range. TC4432 series has significantly reduced current and slower switching. UCC27321D has inverting logic. Each substitute requires design verification for the specific application requirements before interchangeable use.

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