MAX631AC/D Equivalent & Substitute Parts

Part Overview

The MAX631AC/D is a boost and charge pump switching regulator IC from Analog Devices Inc./Maxim Integrated, designed for positive or negative adjustable output voltage regulation. This die-form component delivers 450mA output current with a fixed output of 1.31V (5V) and operates across an input voltage range of 2V to 16.5V. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

MAX631AC/D

Analog Devices Inc./Maxim IntegratedIn Stock: 853MAX631AC/D Datasheet

Current PartRFQ

MAX631ACSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1964MAX631ACSA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX631AC/D is determined by electrical and mechanical compatibility across the following critical parameters:

• Input voltage range: 2V to 16.5V
• Output voltage capability: 1.31V (5V) fixed, up to 18V adjustable
• Output current: 450mA (Switch)
• Switching frequency: 45kHz
• Topology: Boost and charge pump configuration
• Output configuration: Positive or negative
• Operating temperature range: 0°C to 70°C
• Regulatory compliance: ROHS3 and REACH requirements

The MAX631ACSA+ qualifies as a direct substitute because it maintains identical electrical specifications while offering an active product status and improved packaging (8-SOIC form factor) suitable for standard PCB assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The MAX631ACSA+ is the recommended substitute for the obsolete MAX631AC/D. Both components share identical electrical specifications and regulatory compliance certifications (ROHS3 Compliant, REACH Unaffected). The primary distinction is packaging: the MAX631AC/D is supplied as a die, while the MAX631ACSA+ is packaged in 8-SOIC form factor with tube packaging, enabling direct integration into standard surface mount assembly processes. The MAX631ACSA+ maintains active product status, ensuring long-term availability and supply chain continuity. No electrical redesign is required when transitioning to the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the MAX631ACSA+ directly replace the MAX631AC/D in existing designs?

A: Yes. Both parts share identical electrical specifications, including input voltage range (2V to 16.5V), output voltage capability (1.31V fixed, up to 18V adjustable), output current (450mA), and switching frequency (45kHz). The primary difference is packaging: the MAX631AC/D is a die form, while the MAX631ACSA+ is an 8-SOIC package suitable for standard PCB assembly.

Q: What is the significance of the package difference between these parts?

A: The MAX631AC/D die form requires specialized die-attach and wire-bonding assembly processes. The MAX631ACSA+ 8-SOIC package is compatible with conventional surface mount technology (SMT) assembly equipment and processes, reducing manufacturing complexity and cost.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance and REACH unaffected status. Moisture sensitivity level (MSL 1, Unlimited) is also identical, indicating no special storage or handling requirements.

Q: Why is the MAX631AC/D classified as obsolete?

A: The MAX631AC/D die form has been discontinued by the manufacturer. The MAX631ACSA+ represents the active product continuation within the MAX631 family, offering the same electrical functionality in a more accessible package format.

Q: What inventory considerations should be evaluated?

A: The MAX631AC/D has 810 pieces in stock, while the MAX631ACSA+ has 1900 pieces available. For new designs or production ramp, the MAX631ACSA+ is the preferred choice due to higher availability and active product status.