MIC4420BN Equivalent & Substitute Parts

Part Overview

The MIC4420BN 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 non-inverting 8-PDIP device operates with supply voltages from 4.5V to 18V and delivers peak output currents of 6A (source and sink). The MIC4420BN is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across electrical specifications, package form factor, and functional characteristics to ensure direct replacement capability.

Substiute Parts

MIC4420BN

Microchip TechnologyIn Stock: 1471MIC4420BN Datasheet

Current PartRFQ

MIC4420YN

Microchip TechnologyIn Stock: 1516MIC4420YN Datasheet

DirectRFQ

MAX4420CPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2344MAX4420CPA+ Datasheet

MFR RecommendedRFQ

MAX4420EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 5798MAX4420EPA+ Datasheet

MFR RecommendedRFQ

UCC27321P

Texas InstrumentsIn Stock: 9463UCC27321P Datasheet

MFR RecommendedRFQ

UCC37321P

Texas InstrumentsIn Stock: 1593UCC37321P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC4420BN are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Package / Case: 8-DIP (0.300", 7.62mm) — all substitutes must use identical through-hole DIP packaging
• Driven Configuration: Low-Side — all substitutes must be low-side gate drivers
• Channel Type: Single — all substitutes must drive a single channel
• Gate Type: N-Channel, P-Channel MOSFET — all substitutes must support both MOSFET types
• Mounting Type: Through Hole — all substitutes must use through-hole mounting

Functional Compatibility Parameters:

• Voltage - Supply: 4.5V ~ 18V — substitute supply voltage ranges must encompass or match this range
• Current - Peak Output: 6A (source and sink) — substitutes must meet or exceed this specification
• Input Type: Non-Inverting — substitutes with inverting logic require circuit redesign and are listed for reference only

Substitute parts are categorized into two groups: direct equivalents (matching all parameters including input type) and functional alternatives (meeting electrical requirements but with different input logic or operating temperature ranges).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred): MIC4420YN is the primary substitute for MIC4420BN. Both parts are manufactured by Microchip Technology and share identical electrical specifications, including supply voltage range (4.5V ~ 18V), peak output current (6A source/sink), non-inverting input logic, and rise/fall times (12ns, 13ns). MIC4420YN is active in production status, whereas MIC4420BN is obsolete. MIC4420YN achieves ROHS3 compliance, addressing regulatory requirements for new designs. The 8-DIP through-hole package and all functional parameters are identical, enabling direct socket replacement.

Secondary Equivalents (Microchip/Maxim): MAX4420CPA+ and MAX4420EPA+ are manufactured by Analog Devices Inc./Maxim Integrated and provide non-inverting gate driver functionality with identical supply voltage range and output current specifications. Both parts are active in production. MAX4420EPA+ supports extended operating temperature range (-40°C ~ 85°C), making it suitable for industrial applications. MAX4420CPA+ operates within 0°C ~ 70°C. Rise/fall times are 25ns, which is slower than the MIC4420BN specification (12ns, 13ns) but remains acceptable for most low-side gate driving applications. Both achieve ROHS3 compliance.

Alternative Substitutes (Texas Instruments): UCC27321P and UCC37321P are manufactured by Texas Instruments and feature inverting input logic, requiring circuit redesign if used as direct replacements. Both parts deliver higher peak output current (9A source/sink) and operate within 4V ~ 15V supply range. UCC27321P supports -40°C ~ 105°C operating temperature and is in Last Time Buy status. UCC37321P operates within 0°C ~ 70°C and is also Last Time Buy. These parts are listed for reference in applications where inverting logic is acceptable or preferred. Rise/fall times are 20ns.

Compliance Considerations: MIC4420BN is RoHS non-compliant. All active substitute parts (MIC4420YN, MAX4420CPA+, MAX4420EPA+, UCC27321P, UCC37321P) achieve ROHS3 compliance, meeting current regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can MIC4420YN directly replace MIC4420BN without circuit modifications? A: Yes. MIC4420YN is a direct equivalent with identical electrical specifications, package form factor, and non-inverting input logic. No circuit modifications are required for socket replacement.

Q: What is the primary difference between MIC4420BN and MAX4420EPA+? A: Both parts are low-side gate drivers with identical supply voltage range (4.5V ~ 18V) and output current (6A). The primary differences are manufacturer (Microchip vs. Maxim), rise/fall time (12ns vs. 25ns), and operating temperature range (-40°C ~ 150°C vs. -40°C ~ 85°C). MAX4420EPA+ is suitable for applications where the slower switching speed is acceptable.

Q: Why are UCC27321P and UCC37321P listed as substitutes if they have inverting logic? A: UCC27321P and UCC37321P are listed as functional alternatives for applications where inverting gate driver logic is acceptable or preferred. These parts deliver higher output current (9A) and support extended temperature ranges. Circuit redesign is required to accommodate the inverting input logic.

Q: Are all substitute parts available in the same 8-DIP through-hole package? A: Yes. All substitute parts listed (MIC4420YN, MAX4420CPA+, MAX4420EPA+, UCC27321P, UCC37321P) use the 8-DIP (0.300", 7.62mm) through-hole package, enabling direct PCB compatibility.

Q: Which substitute part is recommended for new designs? A: MIC4420YN is recommended for new designs as the primary equivalent. It maintains all electrical specifications of the obsolete MIC4420BN while achieving ROHS3 compliance and active production status. MAX4420EPA+ is recommended for applications requiring extended operating temperature range (-40°C ~ 85°C) with Maxim/Analog Devices supply chain preference.

Q: What is the impact of different rise/fall times on circuit performance? A: Rise/fall time affects switching speed and electromagnetic interference (EMI) characteristics. MIC4420BN and MIC4420YN specify 12ns/13ns, while MAX4420CPA+ and MAX4420EPA+ specify 25ns. Slower rise/fall times reduce EMI but may increase switching losses in high-frequency applications. Circuit validation is necessary if substituting parts with different rise/fall time specifications.

Q: Are there inventory considerations when selecting a substitute? A: Yes. Current inventory levels vary by part and supplier. MIC4420YN (1464 pcs), MAX4420EPA+ (5751 pcs), and UCC27321P (9404 pcs) show higher availability. Verify current inventory status with your component supplier before finalizing part selection.