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MIC4427BN Equivalent & Substitute Parts
Part Overview
The MIC4427BN 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 8-PDIP through-hole component operates across a 4.5V to 18V supply range with dual independent channels and non-inverting logic configuration.
The MIC4427BN is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this gate driver topology.
Substiute Parts
Key Parameters
| Parameter | MIC4427BN Value |
|---|---|
| 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-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MIC4427BN is determined by the following critical parameters:
- Low-side gate driver configuration with dual independent channels
- Non-inverting logic input type
- Supply voltage range of 4.5V to 18V minimum
- Peak output current capability of 1.5A source and sink minimum
- 8-DIP through-hole package format
- Compatibility with N-Channel and P-Channel MOSFET gate drive requirements
Substitute parts must maintain these core electrical and mechanical specifications. Variations in rise/fall time, operating temperature range, and RoHS compliance status are permitted provided the primary functional parameters remain equivalent or superior.
Parameter Comparison
| Part Number | Manufacturer | Supply Voltage | Peak Output Current (Source/Sink) | Rise/Fall Time (Typ) | Operating Temperature | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|
| MIC4427BN | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 20ns / 29ns | -40°C ~ 150°C (TJ) | Obsolete | RoHS non-compliant |
| MIC4427YN | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 20ns / 29ns | -40°C ~ 150°C (TJ) | Active | ROHS3 Compliant |
| TC4427ACPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | 0°C ~ 70°C (TA) | Active | ROHS3 Compliant |
| TC4427AEPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | -40°C ~ 85°C (TA) | Active | ROHS3 Compliant |
| TC4427AVPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | -40°C ~ 125°C (TA) | Active | ROHS3 Compliant |
| TC4427CPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 19ns / 19ns | 0°C ~ 70°C (TA) | Active | ROHS3 Compliant |
| TC4427EPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 19ns / 19ns | -40°C ~ 85°C (TA) | Active | ROHS3 Compliant |
| TC4427VPA | Microchip Technology | 4.5V ~ 18V | 1.5A / 1.5A | 19ns / 19ns | -40°C ~ 125°C (TA) | Active | ROHS3 Compliant |
| IR4427PBF | International Rectifier | 6V ~ 20V | 2.3A / 3.3A | 15ns / 10ns | -40°C ~ 150°C (TJ) | Active | Not specified |
| MAX4427CPA+ | Analog Devices Inc./Maxim Integrated | 4.5V ~ 18V | 1.5A / 1.5A | 20ns / 20ns | 0°C ~ 70°C (TA) | Active | ROHS3 Compliant |
| MAX4427EPA+ | Analog Devices Inc./Maxim Integrated | 4.5V ~ 18V | 1.5A / 1.5A | 20ns / 20ns | -40°C ~ 85°C (TA) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For applications requiring direct replacement of the obsolete MIC4427BN with minimal design modification, MIC4427YN is the primary equivalent. This part maintains identical electrical specifications and package format while offering active product status and ROHS3 compliance.
For designs requiring extended temperature operation to -40°C and above 85°C, TC4427VPA or IR4427PBF provide suitable alternatives. TC4427VPA maintains Microchip ecosystem compatibility with ROHS3 compliance. IR4427PBF offers superior output current capability (2.3A source, 3.3A sink) and faster switching characteristics, suitable for high-frequency switching applications, though it requires verification of logic voltage thresholds in existing designs.
For applications with operating temperature constraints between 0°C and 70°C, TC4427CPA, MAX4427CPA+, or TC4427ACPA provide cost-effective alternatives with improved switching performance and full RoHS compliance.
All recommended substitutes maintain the 8-DIP through-hole package format, dual independent channel configuration, and non-inverting logic input topology required for direct board-level compatibility.
Frequently Asked Questions (FAQ)
Q: Can MIC4427YN directly replace MIC4427BN without circuit modification?
A: Yes. MIC4427YN maintains identical electrical specifications including supply voltage range (4.5V–18V), peak output current (1.5A/1.5A), logic thresholds (0.8V/2.4V), and 8-DIP package format. The primary difference is product status (active vs. obsolete) and RoHS compliance.
Q: What is the difference between TC4427 variants (ACPA, AEPA, AVPA, CPA, EPA, VPA)?
A: TC4427 variants differ in operating temperature range and switching speed. ACPA operates 0°C–70°C, AEPA operates -40°C–85°C, AVPA operates -40°C–125°C. CPA, EPA, and VPA variants offer faster switching (19ns rise/fall vs. 25ns) with identical temperature ranges. All maintain 4.5V–18V supply and 1.5A output current specifications.
Q: Is IR4427PBF a suitable substitute for MIC4427BN?
A: IR4427PBF is functionally compatible but not a direct equivalent. It offers superior specifications: higher output current (2.3A/3.3A vs. 1.5A/1.5A), faster switching (15ns/10ns vs. 20ns/29ns), and extended supply range (6V–20V vs. 4.5V–18V). Logic voltage thresholds differ (0.8V/2.7V vs. 0.8V/2.4V). Substitution requires circuit validation.
Q: Are all substitute parts available in 8-DIP through-hole package?
A: Yes. All listed substitute parts are specified in 8-DIP (0.300", 7.62mm) through-hole package format, ensuring mechanical and board-level compatibility with MIC4427BN footprints.
Q: What is the significance of RoHS compliance for gate driver selection?
A: RoHS3 compliance indicates conformance to hazardous substance restrictions in electronic equipment. MIC4427BN is RoHS non-compliant. All active substitutes listed (MIC4427YN, TC4427 series, MAX4427 series) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.
Q: Can MAX4427 series parts replace MIC4427BN in existing designs?
A: Yes. MAX4427CPA+ and MAX4427EPA+ maintain identical supply voltage (4.5V–18V), output current (1.5A/1.5A), and logic thresholds (0.8V/2.4V). Rise/fall time is 20ns/20ns (vs. 20ns/29ns for MIC4427BN). Operating temperature ranges differ: MAX4427CPA+ operates 0°C–70°C, MAX4427EPA+ operates -40°C–85°C. Select based on application temperature requirements.
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