MAX4427ESA Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MAX4427ESA is a low-side gate driver IC manufactured by Analog Devices Inc./Maxim Integrated, designed for driving N-Channel and P-Channel MOSFETs in independent channel configurations. This non-inverting gate driver operates across a 4.5V to 18V supply range with 1.5A peak output current capability and is packaged in an 8-SOIC surface mount package.

The MAX4427ESA is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Key Parameters

Parameter	Value
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)	1.5A, 1.5A
Input Type	Non-Inverting
Rise / Fall Time (Typ)	20ns, 20ns
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4427ESA 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 P-Channel MOSFETs
Input Type: Must be Non-Inverting
Package / Case: Must be 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Must be Surface Mount

Substitute parts must maintain compatibility within these core electrical and mechanical specifications. Variations in supply voltage range, logic voltage thresholds, peak output current, rise/fall time, and operating temperature are permissible provided the substitute part meets or exceeds the minimum requirements of the original design.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Supply	Logic Voltage - VIL, VIH	Current - Peak Output (Source, Sink)	Rise / Fall Time (Typ)	Operating Temperature	RoHS Status
MAX4427ESA	Analog Devices Inc./Maxim Integrated	Obsolete	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 20ns	-40°C ~ 85°C (TA)	RoHS non-compliant
MAX4427ESA+	Analog Devices Inc./Maxim Integrated	Active	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 20ns	-40°C ~ 85°C (TA)	ROHS3 Compliant
UCC27324D	Texas Instruments	Last Time Buy	4.5V ~ 15V	1V, 2V	4A, 4A	20ns, 15ns	-55°C ~ 150°C (TJ)	ROHS3 Compliant
MIC4427YM	Microchip Technology	Active	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 29ns	-40°C ~ 150°C (TJ)	ROHS3 Compliant
MIC4427YM-TR	Microchip Technology	Active	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	20ns, 29ns	-40°C ~ 150°C (TJ)	ROHS3 Compliant
TC4427AEOA	Microchip Technology	Active	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	25ns, 25ns	-40°C ~ 85°C (TA)	ROHS3 Compliant
TC4427EOA	Microchip Technology	Active	4.5V ~ 18V	0.8V, 2.4V	1.5A, 1.5A	19ns, 19ns	-40°C ~ 85°C (TA)	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MAX4427ESA+

The MAX4427ESA+ is the direct active equivalent from the original manufacturer, Analog Devices Inc./Maxim Integrated. It maintains identical electrical specifications to the MAX4427ESA while offering ROHS3 compliance and active product status. This part is the preferred choice for direct replacement in new designs and production continuity.

Secondary Recommendations: MIC4427YM and MIC4427YM-TR

The Microchip Technology MIC4427YM and MIC4427YM-TR are functionally equivalent alternatives with identical core electrical parameters. Both parts are in active production status with ROHS3 compliance. The MIC4427YM-TR variant is supplied in Cut Tape (CT) & Digi-Reel® packaging, while the MIC4427YM is supplied in tube packaging. These parts support extended operating temperature ranges (-40°C to 150°C) compared to the original specification.

Alternative Recommendations: TC4427AEOA and TC4427EOA

The Microchip Technology TC4427AEOA and TC4427EOA are compatible substitutes with identical electrical specifications and active product status. The TC4427EOA offers slightly faster rise and fall times (19ns) compared to the TC4427AEOA (25ns). Both maintain the original operating temperature range of -40°C to 85°C and are ROHS3 compliant.

Conditional Consideration: UCC27324D

The Texas Instruments UCC27324D is functionally compatible but carries a Last Time Buy status, indicating limited future availability. This part offers enhanced peak output current (4A versus 1.5A) and extended operating temperature range (-55°C to 150°C). However, the supply voltage range is restricted to 4.5V to 15V, which may not accommodate applications requiring the full 18V upper limit of the original specification. Selection of this part should be evaluated against specific application requirements and long-term supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the MAX4427ESA be directly replaced with MAX4427ESA+?

A: Yes. The MAX4427ESA+ is the active equivalent from the original manufacturer with identical electrical specifications. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). Direct substitution is supported without design modification.

Q: What is the difference between MIC4427YM and MIC4427YM-TR?

A: Both parts are electrically identical. The primary difference is packaging format: MIC4427YM is supplied in tube packaging, while MIC4427YM-TR is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements and tape-and-reel compatibility with pick-and-place equipment.

Q: Are TC4427AEOA and TC4427EOA interchangeable?

A: Yes, both parts are functionally compatible. The TC4427EOA offers faster rise and fall times (19ns versus 25ns). If timing-critical applications require the faster switching characteristics, TC4427EOA is the preferred choice. Otherwise, both parts are interchangeable.

Q: Why is UCC27324D listed as a conditional recommendation?

A: The UCC27324D carries a Last Time Buy status, indicating limited future availability. Additionally, its maximum supply voltage is 15V, which does not accommodate the full 4.5V to 18V range of the original MAX4427ESA. Applications requiring operation above 15V must use alternative substitutes. The UCC27324D is suitable only for designs operating within its 4.5V to 15V specification.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original MAX4427ESA is RoHS non-compliant. If RoHS compliance is a design requirement, any of the listed substitutes satisfy this requirement.

Q: Do substitute parts require PCB layout modifications?

A: No. All substitute parts maintain the 8-SOIC (0.154", 3.90mm Width) package specification and surface mount mounting type. PCB footprints and layout remain unchanged.

Q: What is the inventory status of substitute parts?

A: MAX4427ESA+ (2,200 pcs), UCC27324D (1,215 pcs), MIC4427YM (17,581 pcs), MIC4427YM-TR (1,818 pcs), TC4427AEOA (31,500 pcs), and TC4427EOA (15,723 pcs) are available in stock. Inventory levels should be verified with the supplier for current availability.

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