MAX1678EUA Equivalent & Substitute Parts

Part Overview

The MAX1678EUA is a boost switching regulator IC from Analog Devices Inc./Maxim Integrated, designed for step-up voltage conversion applications. This device operates as a positive adjustable/fixed output regulator with a single output configuration, capable of delivering 550mA at the switch. The MAX1678EUA is classified as obsolete, which necessitates identification of equivalent substitute parts for new designs or component replenishment in production environments.

Substiute Parts

MAX1678EUA

Analog Devices Inc./Maxim IntegratedIn Stock: 3271MAX1678EUA Datasheet

Current PartRFQ

MAX1678EUA+

Analog Devices Inc./Maxim IntegratedIn Stock: 23542MAX1678EUA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX1678EUA is determined by strict equivalence across the following critical parameters:

• Topology: Boost switching regulator
• Output configuration: Positive, single output
• Output type: Adjustable (Fixed)
• Input voltage range: 0.7V to 5.5V
• Output voltage range: 2V to 5.5V
• Output current capability: 550mA (Switch)
• Switching frequency: 150kHz
• Synchronous rectifier: Present
• Operating temperature range: -40°C to 85°C
• Package type: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Base product number: MAX1678

The MAX1678EUA+ meets all these criteria and is therefore a direct substitute. The primary distinction between these parts is product status and packaging format, not electrical or mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MAX1678EUA+ is the direct substitute for the MAX1678EUA. Both parts are electrically and mechanically identical across all functional parameters. Selection between these parts is determined by regulatory and supply chain considerations:

• The MAX1678EUA is obsolete and should not be selected for new designs.
• The MAX1678EUA+ is active and available in production quantities (23,440 pieces in stock versus 3,260 for the original part).
• The MAX1678EUA+ is ROHS3 compliant, whereas the MAX1678EUA is RoHS non-compliant. This distinction is critical for applications subject to RoHS regulations.
• The MAX1678EUA+ is supplied in tube packaging, providing standard handling and storage conditions for surface mount components.

For all new applications and component replenishment, the MAX1678EUA+ is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can MAX1678EUA+ be used as a direct replacement for MAX1678EUA in existing designs?

A: Yes. The MAX1678EUA+ is electrically and mechanically identical to the MAX1678EUA. All electrical parameters, package dimensions, and pin configurations are equivalent. The parts are pin-for-pin compatible and require no circuit modifications.

Q: What is the difference between MAX1678EUA and MAX1678EUA+?

A: The primary differences are product status, RoHS compliance, and packaging format. The MAX1678EUA is obsolete and RoHS non-compliant, while the MAX1678EUA+ is active and ROHS3 compliant. Both parts deliver identical electrical performance and are housed in the same 8-uMAX/uSOP package.

Q: Are there any compatibility concerns when substituting MAX1678EUA+ for MAX1678EUA?

A: No compatibility concerns exist. The parts share identical electrical specifications, operating ranges, and package footprints. PCB layouts and component placement require no modification.

Q: Why should MAX1678EUA+ be preferred over MAX1678EUA?

A: The MAX1678EUA+ should be preferred because it is an active product with superior availability, ROHS3 compliance for regulatory adherence, and identical electrical performance. The MAX1678EUA is obsolete and presents supply chain risk.

Q: What is the 8-uMAX/uSOP package?

A: The 8-uMAX/uSOP is a surface mount package designation for the 8-TSSOP, 8-MSOP form factor with 0.118" (3.00mm) width. This compact package is standard for boost regulator ICs in this power class.

Q: Are there any thermal or reliability differences between these parts?

A: No. Both parts operate across the identical temperature range (-40°C to 85°C) and share the same thermal characteristics. Reliability and thermal performance are equivalent.