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MIC4425BN Low-Side Gate Driver IC Equivalent & Substitute Parts
Part Overview
The MIC4425BN is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in independent configurations. This component operates across a 4.5V to 18V supply voltage range with dual independent drivers and inverting/non-inverting input options. The MIC4425BN is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives from Microchip's gate driver portfolio provide direct functional replacement with enhanced compliance and availability.
Substiute Parts
Key Parameters
| Parameter | MIC4425BN 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) | 3A, 3A |
| Input Type | Inverting, Non-Inverting |
| Rise / Fall Time (Typ) | 28ns, 32ns |
| 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 for the MIC4425BN is determined by strict equivalence across the following critical parameters: low-side gate driver configuration, dual independent channels, 4.5V to 18V supply voltage compatibility, 0.8V/2.4V logic thresholds, 8-DIP through-hole package, and MOSFET gate type support. Substitute parts are grouped into three categories based on electrical performance alignment:
Direct Equivalents (Identical Electrical Performance): Parts maintaining 3A peak output current, 28-32ns rise/fall times, and full -40°C to 150°C temperature range.
Performance-Aligned Substitutes (Reduced Output Current): Parts with 1.5A peak output current instead of 3A, suitable for applications not requiring maximum drive capability.
Temperature-Constrained Substitutes: Parts with restricted operating temperature ranges (0°C to 70°C or -40°C to 85°C) instead of the full -40°C to 150°C range.
All substitute parts maintain identical package geometry, supply voltage range, logic thresholds, and dual independent driver configuration.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Supply Voltage | Peak Output Current (Source/Sink) | Rise/Fall Time (Typ) | Operating Temperature | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|
| MIC4425BN | Microchip Technology | Obsolete | 4.5V ~ 18V | 3A / 3A | 28ns / 32ns | -40°C ~ 150°C (TJ) | RoHS non-compliant | 3000 Pcs |
| MIC4425YN | Microchip Technology | Active | 4.5V ~ 18V | 3A / 3A | 28ns / 32ns | -40°C ~ 150°C (TJ) | ROHS3 Compliant | 2332 Pcs |
| TC4425EPA | Microchip Technology | Active | 4.5V ~ 18V | 3A / 3A | 23ns / 25ns | -40°C ~ 150°C (TJ) | ROHS3 Compliant | 1214 Pcs |
| TC4425VPA | Microchip Technology | Active | 4.5V ~ 18V | 3A / 3A | 23ns / 25ns | -40°C ~ 150°C (TJ) | ROHS3 Compliant | 2000 Pcs |
| TC428CPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 30ns / 30ns | 0°C ~ 70°C (TA) | ROHS3 Compliant | 3788 Pcs |
| TC428EPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 30ns / 30ns | -40°C ~ 85°C (TA) | ROHS3 Compliant | 1124 Pcs |
| TC4425CPA | Microchip Technology | Active | 4.5V ~ 18V | 3A / 3A | 23ns / 25ns | 0°C ~ 150°C (TJ) | ROHS3 Compliant | 1519 Pcs |
| TC4428AEPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | -40°C ~ 85°C (TA) | ROHS3 Compliant | 7700 Pcs |
| TC4428AVPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | -40°C ~ 125°C (TA) | ROHS3 Compliant | 45727 Pcs |
| TC4428CPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 25ns / 25ns | 0°C ~ 70°C (TA) | ROHS3 Compliant | 3857 Pcs |
| TC4428EPA | Microchip Technology | Active | 4.5V ~ 18V | 1.5A / 1.5A | 19ns / 19ns | -40°C ~ 85°C (TA) | ROHS3 Compliant | 6048 Pcs |
Engineering Selection Recommendations
Primary Direct Equivalent: MIC4425YN provides identical electrical performance to MIC4425BN with active product status and ROHS3 compliance. This part maintains 3A peak output current, 28ns/32ns switching times, and -40°C to 150°C operating range. Selection of MIC4425YN eliminates obsolescence risk while preserving all electrical characteristics.
Performance-Enhanced Alternatives: TC4425EPA and TC4425VPA offer improved switching performance (23ns/25ns rise/fall times) with identical 3A output current and full temperature range. Both parts are ROHS3 compliant and active. TC4425VPA provides the same electrical performance as TC4425EPA with alternative packaging designation.
Reduced-Current Substitutes: TC4428AVPA, TC4428AEPA, TC4428CPA, TC428EPA, and TC428CPA operate with 1.5A peak output current. These parts are suitable only for applications where gate drive current requirements do not exceed 1.5A per channel. TC4428AVPA offers the widest temperature range (-40°C to 125°C) among reduced-current options with highest inventory availability (45,727 pcs).
Temperature-Constrained Options: TC428CPA and TC4428CPA restrict operation to 0°C to 70°C. TC428EPA and TC4428EPA limit operation to -40°C to 85°C. These parts are suitable only for applications within their specified temperature ranges.
All substitute parts maintain 8-DIP through-hole package compatibility, 4.5V to 18V supply voltage range, and dual independent driver configuration. Selection must account for application-specific requirements for peak output current and operating temperature range.
Frequently Asked Questions (FAQ)
Q: Can MIC4425YN directly replace MIC4425BN in existing designs?
A: Yes. MIC4425YN maintains identical electrical specifications including 3A peak output current, 28ns/32ns switching times, -40°C to 150°C operating range, and 8-DIP package geometry. The primary difference is active product status and ROHS3 compliance versus the obsolete, non-compliant MIC4425BN.
Q: What is the difference between TC4425EPA and TC4425VPA?
A: Both parts are electrically identical with 3A output current, 23ns/25ns switching times, and -40°C to 150°C operating range. The difference is packaging designation (EPA versus VPA). Both are ROHS3 compliant and active.
Q: Can TC4428AVPA replace MIC4425BN?
A: TC4428AVPA is functionally compatible but with reduced peak output current (1.5A versus 3A). Substitution is valid only if the application gate drive current requirement does not exceed 1.5A per channel. TC4428AVPA offers superior temperature range (-40°C to 125°C) and highest inventory availability.
Q: Why do some substitutes have reduced operating temperature ranges?
A: TC428CPA and TC4428CPA operate only 0°C to 70°C. TC428EPA and TC4428EPA operate -40°C to 85°C. These restrictions reflect the specific temperature qualification of each part variant. Selection must verify application operating temperature compatibility.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant. The original MIC4425BN is RoHS non-compliant. Substitution with any listed part improves regulatory compliance.
Q: What is the package compatibility between MIC4425BN and substitute parts?
A: All substitute parts use 8-DIP (0.300", 7.62mm) through-hole package identical to MIC4425BN. Direct PCB footprint compatibility is maintained across all substitutes.
Q: Which substitute offers the best performance improvement?
A: TC4425EPA and TC4425VPA provide improved switching performance (23ns/25ns versus 28ns/32ns) while maintaining 3A output current and full -40°C to 150°C temperature range. These parts represent performance-enhanced alternatives with no electrical compromises.
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