MAX628ESA Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MAX628ESA is a low-side gate driver IC manufactured by Analog Devices Inc./Maxim Integrated, designed for driving N-Channel and P-Channel MOSFETs in power management applications. This device features independent dual-channel configuration with inverting and non-inverting input types, operating across a 4.5V to 18V supply voltage range.

The MAX628ESA is classified as obsolete, which necessitates identification of functionally equivalent substitute components for ongoing design support and procurement. Active and last-time-buy alternatives are available from Microchip Technology and Texas Instruments that maintain electrical and mechanical compatibility within the 8-SOIC package form factor.

Key Parameters

Parameter	MAX628ESA
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)	2A, 2A
Input Type	Inverting, Non-Inverting
Rise / Fall Time (Typ)	25ns, 20ns
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX628ESA is determined by strict equivalence across the following critical parameters:

Driven Configuration: Must be Low-Side
Number of Drivers: Must be 2 independent channels
Gate Type: Must support N-Channel and P-Channel MOSFET driving
Package / Case: Must be 8-SOIC (0.154", 3.90mm Width)
Supply Voltage Range: Must encompass or match 4.5V ~ 18V
Input Type: Must support both Inverting and Non-Inverting configurations
Mounting Type: Must be Surface Mount

Substitute parts are grouped into two categories based on product status: active components suitable for new designs, and last-time-buy components available for legacy system support. All substitutes maintain ROHS3 compliance and MSL Level 1 rating.

Parameter Comparison

Parameter	MAX628ESA	MAX628ESA+	TC4425AVOA	TC4425AVOA713	UCC27325D	UCC27325DR	UCC37325D	UCC37325DR
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Microchip Technology	Microchip Technology	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Last Time Buy	Active	Last Time Buy	Active
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2	2
Gate Type	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET	N-Channel, P-Channel MOSFET
Voltage - Supply	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 15V	4.5V ~ 15V	4.5V ~ 15V	4.5V ~ 15V
Logic Voltage - VIL, VIH	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	1V, 2V	1V, 2V	1V, 2V	1V, 2V
Current - Peak Output (Source, Sink)	2A, 2A	2A, 2A	4.5A, 4.5A	4.5A, 4.5A	4A, 4A	4A, 4A	4A, 4A	4A, 4A
Input Type	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting	Inverting, Non-Inverting
Rise / Fall Time (Typ)	25ns, 20ns	25ns, 20ns	12ns, 12ns	12ns, 12ns	20ns, 15ns	20ns, 15ns	20ns, 15ns	20ns, 15ns
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 150°C (TJ)	-40°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Active Production Designs:

MAX628ESA+ (Analog Devices Inc./Maxim Integrated) is the direct successor to the obsolete MAX628ESA, maintaining identical electrical specifications and operating temperature range. This component is recommended as the primary replacement for existing MAX628ESA applications requiring minimal design modification.

TC4425AVOA and TC4425AVOA713 (Microchip Technology) are active alternatives offering enhanced performance characteristics, including higher peak output current (4.5A versus 2A) and faster switching times (12ns versus 25ns/20ns). These components support the full 4.5V to 18V supply voltage range and are suitable for applications requiring improved drive capability within the same 8-SOIC package footprint.

UCC27325DR and UCC37325DR (Texas Instruments) are active components providing 4A peak output current and extended operating temperature range (-55°C to 150°C). Supply voltage range is limited to 4.5V to 15V, which restricts applicability to designs operating below 18V. These components are suitable for applications within their specified voltage envelope.

For Legacy System Support:

UCC27325D and UCC37325D (Texas Instruments) are available as last-time-buy components with identical electrical specifications to their DR variants. These are appropriate for sustaining production of existing designs where supply voltage remains within the 4.5V to 15V range.

Compliance and Regulatory Status:

All substitute components maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols. REACH compliance status is consistent across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can MAX628ESA be directly replaced with MAX628ESA+ without circuit modification?

A: Yes. MAX628ESA+ maintains identical electrical specifications, operating temperature range, and 8-SOIC package dimensions. Direct substitution is supported without design changes.

Q: What are the key differences between Microchip TC4425AVOA and the original MAX628ESA?

A: TC4425AVOA provides higher peak output current (4.5A versus 2A) and faster switching times (12ns versus 25ns/20ns). Both support the full 4.5V to 18V supply voltage range and identical 8-SOIC packaging. The enhanced performance characteristics make TC4425AVOA suitable for applications requiring improved gate drive capability.

Q: Are Texas Instruments UCC27325 and UCC37325 suitable replacements for applications using 18V supply voltage?

A: No. UCC27325 and UCC37325 series components are specified for maximum 15V supply voltage. Applications requiring 18V operation must use MAX628ESA+, TC4425AVOA, or TC4425AVOA713.

Q: What is the difference between TC4425AVOA (Tube packaging) and TC4425AVOA713 (Tape & Reel packaging)?

A: Both variants are electrically identical with matching specifications. Packaging difference reflects distribution format: Tube packaging for manual handling and smaller quantities, Tape & Reel for automated assembly processes. Selection depends on procurement and manufacturing requirements.

Q: Can UCC27325D (Last Time Buy) be used in new product designs?

A: UCC27325D is designated as last-time-buy, indicating limited future availability. For new designs, active alternatives such as UCC27325DR, TC4425AVOA, or MAX628ESA+ are recommended to ensure long-term supply continuity.

Q: Are all substitute parts compatible with the same PCB layout and footprint?

A: Yes. All substitute components use identical 8-SOIC (0.154", 3.90mm Width) package dimensions, supporting direct PCB footprint compatibility without layout modification.

Q: What operating temperature range should be considered when selecting between substitutes?

A: MAX628ESA and MAX628ESA+ operate to 85°C (TA). Microchip TC4425 and Texas Instruments UCC27325/UCC37325 series extend to 150°C (TJ). Selection depends on application thermal requirements and ambient operating conditions.

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