MIC4126BME Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4126BME is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel MOSFET gates in power management applications. This device operates with a supply voltage range of 4.5V to 20V and delivers peak output currents of 1.5A (source and sink). The MIC4126BME is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and production continuity.

Key Parameters

Parameter	MIC4126BME Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Description	IC GATE DRVR LOW-SIDE 8SOIC
Driven Configuration	Low-Side
Number of Drivers	2
Gate Type	N-Channel MOSFET
Voltage - Supply	4.5V ~ 20V
Logic Voltage - VIL, VIH	0.8V, 2.4V
Current - Peak Output (Source, Sink)	1.5A, 1.5A
Input Type	Inverting
Rise / Fall Time (Typ)	20ns, 18ns
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MIC4126BME is determined by the following critical parameters:

Driven Configuration: Must be Low-Side
Number of Drivers: Must be 2
Input Type: Must be Inverting
Package / Case: Must be 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Must be Surface Mount
Gate Type Compatibility: N-Channel MOSFET (minimum requirement)
Voltage - Supply Range: Must encompass or match 4.5V ~ 20V
Logic Voltage Levels: VIL and VIH must be compatible with 0.8V and 2.4V
Current - Peak Output: Must meet or exceed 1.5A source and sink capability

Substitute parts are grouped into two categories:

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

MIC4126YME: Enhanced variant with exposed pad and improved thermal performance
MCP1403-E/SN and MCP1403T-E/SN: Higher current capability (4.5A) with extended temperature range
TC426 Series (TC426COA, TC426COA713, TC426EOA, TC426EOA713): Matched electrical performance with active product status
TC1426 Series (TC1426COA, TC1426COA713): Lower current variant (1.2A) with reduced operating temperature range
TC4423AVOA: Enhanced performance variant with 4.5A output current and 12ns rise/fall time

Category 2: Functional Compatibility All substitute parts maintain the same driven configuration (low-side), channel count (2), input type (inverting), and package form factor (8-SOIC). Electrical parameters vary within acceptable ranges for gate driver applications.

Parameter Comparison

Part Number	Manufacturer	Driven Configuration	Number of Drivers	Gate Type	Voltage - Supply	Current - Peak Output (Source, Sink)	Input Type	Rise / Fall Time (Typ)	Operating Temperature	Package / Case	Product Status	RoHS Status
MIC4126BME	Microchip Technology	Low-Side	2	N-Channel MOSFET	4.5V ~ 20V	1.5A, 1.5A	Inverting	20ns, 18ns	-40°C ~ 125°C (TJ)	8-SOIC	Obsolete	RoHS non-compliant
MIC4126YME	Microchip Technology	Low-Side	2	N-Channel MOSFET	4.5V ~ 20V	1.5A, 1.5A	Inverting	20ns, 18ns	-40°C ~ 125°C (TJ)	8-SOIC-EP	Active	ROHS3 Compliant
MCP1403-E/SN	Microchip Technology	Low-Side	2	IGBT, N-Channel, P-Channel MOSFET	4.5V ~ 18V	4.5A, 4.5A	Inverting	15ns, 18ns	-40°C ~ 150°C (TJ)	8-SOIC	Active	ROHS3 Compliant
MCP1403T-E/SN	Microchip Technology	Low-Side	2	IGBT, N-Channel, P-Channel MOSFET	4.5V ~ 18V	4.5A, 4.5A	Inverting	15ns, 18ns	-40°C ~ 150°C (TJ)	8-SOIC	Active	ROHS3 Compliant
TC1426COA	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 16V	1.2A, 1.2A	Inverting	35ns, 25ns	0°C ~ 70°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC1426COA713	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 16V	1.2A, 1.2A	Inverting	35ns, 25ns	0°C ~ 70°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC426COA	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 18V	1.5A, 1.5A	Inverting	30ns, 30ns	0°C ~ 70°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC426COA713	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 18V	1.5A, 1.5A	Inverting	30ns, 30ns	0°C ~ 70°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC426EOA	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 18V	1.5A, 1.5A	Inverting	30ns, 30ns	-40°C ~ 85°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC426EOA713	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 18V	1.5A, 1.5A	Inverting	30ns, 30ns	-40°C ~ 85°C (TA)	8-SOIC	Active	ROHS3 Compliant
TC4423AVOA	Microchip Technology	Low-Side	2	N-Channel, P-Channel MOSFET	4.5V ~ 18V	4.5A, 4.5A	Inverting	12ns, 12ns	-40°C ~ 150°C (TJ)	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Enhanced Compliance: MIC4126YME is the primary equivalent, offering identical electrical performance to the MIC4126BME with ROHS3 compliance and active product status. The exposed pad variant (8-SOIC-EP) provides improved thermal dissipation. This part is recommended for new designs requiring the same electrical characteristics as the obsolete MIC4126BME.

For Applications Requiring Higher Output Current: MCP1403-E/SN and MCP1403T-E/SN deliver 4.5A peak output current (versus 1.5A in the original), with extended operating temperature range to 150°C. These parts are suitable for applications demanding higher gate drive capability. The supply voltage range is reduced to 4.5V ~ 18V. Both variants are ROHS3 compliant and active.

For Matched Electrical Performance with Extended Temperature Range: TC426EOA and TC426EOA713 provide 1.5A output current matching the MIC4126BME, with operating temperature range of -40°C ~ 85°C. These parts maintain the same supply voltage range (4.5V ~ 18V) and are ROHS3 compliant. The 713 suffix indicates Tape & Reel packaging.

For High-Performance Applications: TC4423AVOA offers 4.5A output current with the fastest rise/fall times (12ns) and extended temperature range to 150°C. This part is suitable for demanding applications requiring superior switching performance and thermal stability.

For Cost-Optimized Solutions with Reduced Temperature Range: TC1426COA and TC1426COA713 provide functional equivalence with 1.2A output current and operating temperature range of 0°C ~ 70°C. These parts are suitable for commercial-grade applications where extended temperature performance is not required.

All recommended substitutes are manufactured by Microchip Technology, maintain the 8-SOIC package form factor, and are ROHS3 compliant with active product status.

Frequently Asked Questions (FAQ)

Q: Can MIC4126YME be used as a direct drop-in replacement for MIC4126BME? A: Yes. MIC4126YME provides identical electrical performance (1.5A output current, 4.5V ~ 20V supply range, 20ns/18ns rise/fall times) with the same 8-SOIC package footprint. The primary difference is the exposed pad variant (8-SOIC-EP) which improves thermal performance. MIC4126YME is active and ROHS3 compliant.

Q: What is the difference between TC426COA and TC426EOA? A: Both parts deliver 1.5A output current with identical electrical specifications. The primary difference is operating temperature range: TC426COA operates 0°C ~ 70°C, while TC426EOA operates -40°C ~ 85°C. Select TC426EOA for applications requiring extended low-temperature performance.

Q: Why would I choose MCP1403-E/SN over MIC4126YME? A: MCP1403-E/SN provides 4.5A peak output current (3x higher than MIC4126YME's 1.5A) and extended operating temperature to 150°C. This part is suitable for applications requiring higher gate drive capability or superior thermal stability. The supply voltage range is reduced to 4.5V ~ 18V.

Q: Are all substitute parts available in both Tube and Tape & Reel packaging? A: Most substitute parts are available in both packaging options. Parts with "713" suffix indicate Tape & Reel packaging. Parts without this suffix are typically supplied in Tube packaging. Verify packaging availability with your supplier for specific part numbers.

Q: What is the significance of the exposed pad (EP) in MIC4126YME? A: The exposed pad provides a thermal connection to the substrate, improving heat dissipation during operation. This is beneficial in applications with high switching frequency or continuous operation. The 8-SOIC-EP package maintains the same footprint as standard 8-SOIC.

Q: Can TC4423AVOA be used in applications designed for MIC4126BME? A: Yes, with design considerations. TC4423AVOA is functionally compatible with identical package and configuration. However, the 4.5A output current (versus 1.5A) and 12ns rise/fall times (versus 20ns/18ns) represent performance enhancements. Verify that your circuit design can accommodate the faster switching characteristics.

Q: What is the impact of RoHS compliance on part selection? A: The MIC4126BME is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant, meeting current environmental regulations. For new designs and production, ROHS3 compliant parts are required in most markets.

Q: Are there any supply voltage limitations when substituting parts? A: Yes. The MIC4126BME operates 4.5V ~ 20V. Most substitute parts operate 4.5V ~ 18V (MCP1403, TC426, TC4423 series) or 4.5V ~ 16V (TC1426 series). Verify your application's supply voltage falls within the substitute part's specified range before selection.

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