MIC4423BN Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4423BN 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 component operates with a supply voltage range of 4.5V to 18V and delivers peak output currents of 3A (source and sink). The MIC4423BN is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across driven configuration, channel type, gate type support, and electrical performance parameters.

Key Parameters

Parameter	MIC4423BN Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Description	IC GATE DRVR LOW-SIDE 8DIP
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
Rise / Fall Time (Typ)	28ns, 32ns
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MIC4423BN is determined by the following critical parameters:

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

Substitute parts are grouped into three categories based on their relationship to the MIC4423BN:

Direct Substitutes (MIC4423YN, TC4423EPA): Functionally equivalent parts from the same or compatible product families with identical or superior electrical specifications and active product status.

Upgrade Options (TC4423VPA, TC4423CPA): Enhanced versions offering improved performance characteristics (faster rise/fall times) while maintaining core functional compatibility.

Cross-Manufacturer Alternatives (UCC27323P, UCC27423P, IR4426PBF): Parts from different manufacturers meeting the same functional requirements with variations in electrical performance and supply voltage ranges.

Parameter Comparison

Parameter	MIC4423BN	MIC4423YN	TC4423EPA	TC4423VPA	TC4423CPA	UCC27323P	UCC27423P	IR4426PBF
Manufacturer	Microchip	Microchip	Microchip	Microchip	Microchip	Texas Instruments	Texas Instruments	International Rectifier
Driven Configuration	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
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	IGBT, N-Channel MOSFET
Voltage - Supply	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 15V	4V ~ 15V	6V ~ 20V
Logic Voltage - VIL, VIH	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	1V, 2V	1V, 2V	0.8V, 2.7V
Current - Peak Output (Source, Sink)	3A, 3A	3A, 3A	3A, 3A	3A, 3A	3A, 3A	4A, 4A	4A, 4A	2.3A, 3.3A
Input Type	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Rise / Fall Time (Typ)	28ns, 32ns	28ns, 32ns	23ns, 25ns	23ns, 25ns	23ns, 25ns	20ns, 15ns	20ns, 15ns	15ns, 10ns
Operating Temperature	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	0°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-40°C ~ 125°C (TA)	-40°C ~ 150°C (TJ)
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Active	Active	Last Time Buy	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified

Engineering Selection Recommendations

For Direct Replacement with Active Product Status:

MIC4423YN is the primary direct substitute, offering identical electrical specifications and package compatibility while maintaining active product status and ROHS3 compliance. This part is recommended for designs requiring minimal validation effort.

For Enhanced Performance:

TC4423EPA, TC4423VPA, and TC4423CPA offer improved rise and fall times (23ns/25ns versus 28ns/32ns) while maintaining supply voltage and output current specifications. TC4423VPA has the highest inventory availability (3773 pcs). TC4423CPA is manufacturer-recommended but operates at a reduced lower temperature limit (0°C minimum versus -40°C).

For Cross-Manufacturer Alternatives:

UCC27323P and UCC27423P (Texas Instruments) provide higher peak output currents (4A source and sink) but operate within a reduced supply voltage range (4.5V to 15V for UCC27323P; 4V to 15V for UCC27423P). UCC27323P is in Last Time Buy status. UCC27423P is active with 5022 pcs inventory.

IR4426PBF (International Rectifier) supports IGBT and N-Channel MOSFET gate types with extended supply voltage range (6V to 20V) but delivers asymmetric output currents (2.3A source, 3.3A sink) and faster switching times (15ns/10ns). This part is suitable for applications requiring higher supply voltages or IGBT driving capability.

Compliance Considerations:

All substitute parts except IR4426PBF carry ROHS3 compliance certification. The original MIC4423BN is RoHS non-compliant. For applications requiring RoHS compliance, any of the listed substitutes provide compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can MIC4423YN directly replace MIC4423BN without circuit modifications?

A: Yes. MIC4423YN maintains identical electrical specifications, package configuration, and functional characteristics. The primary difference is product status (active versus obsolete) and RoHS compliance improvement.

Q: What is the key difference between TC4423EPA and TC4423VPA?

A: Both parts offer identical electrical specifications and supply voltage ranges. TC4423VPA has higher inventory availability (3773 pcs versus 1102 pcs for TC4423EPA). Selection between these parts depends on procurement lead time and inventory requirements.

Q: Why does TC4423CPA have a different operating temperature range?

A: TC4423CPA specifies a minimum operating temperature of 0°C (TJ) compared to -40°C for other Microchip alternatives. This part is suitable for applications operating within 0°C to 150°C range only.

Q: Can UCC27323P or UCC27423P be used in applications requiring 18V supply voltage?

A: No. Both Texas Instruments parts operate within reduced supply voltage ranges (4.5V to 15V for UCC27323P; 4V to 15V for UCC27423P). Applications requiring 18V supply voltage must use Microchip parts (MIC4423YN, TC4423EPA, TC4423VPA, TC4423CPA) or IR4426PBF (6V to 20V).

Q: Is IR4426PBF suitable for P-Channel MOSFET driving?

A: IR4426PBF supports IGBT and N-Channel MOSFET gate types. It does not explicitly support P-Channel MOSFET driving. For applications requiring P-Channel MOSFET support, use Microchip or Texas Instruments alternatives.

Q: What are the inventory considerations for production planning?

A: IR4426PBF has the highest inventory (28700 pcs). TC4423VPA offers 3773 pcs. UCC27323P provides 8188 pcs. MIC4423YN has 1427 pcs. For long-term production requirements, IR4426PBF or UCC27323P provide the most stable supply positions.

Q: Are all substitute parts available in 8-DIP through-hole packaging?

A: Yes. All listed substitute parts are available in 8-DIP (0.300", 7.62mm) through-hole package configuration, ensuring direct PCB compatibility with MIC4423BN designs.

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