MAX635AC/D Equivalent & Substitute Parts

Part Overview

The MAX635AC/D is a buck switching regulator IC designed for negative adjustable output voltage regulation at -1.31V (-5V) with 500mA output current capacity. This component operates as a step-down/inverted topology power management solution with a switching frequency of 50kHz. The part is currently classified as obsolete, making identification of active equivalent components essential for ongoing design support and procurement continuity.

Substiute Parts

MAX635AC/D

Analog Devices Inc./Maxim IntegratedIn Stock: 1119MAX635AC/D Datasheet

Current PartRFQ

MAX635ACSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1367MAX635ACSA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX635AC/D is determined by equivalence across the following critical parameters:

• Functional topology: Step-down/inverted buck regulator architecture
• Output voltage specification: -1.31V (-5V) negative adjustable (fixed) output
• Output current capacity: 500mA minimum
• Input voltage range: 2.3V to 16.5V compatibility
• Switching frequency: 50kHz operation
• Operating temperature range: 0°C to 70°C
• Regulatory compliance: ROHS3 compliant, REACH unaffected status

The MAX635ACSA+ maintains electrical equivalence across all specified parameters while differing in packaging format and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The MAX635ACSA+ serves as the active equivalent for the obsolete MAX635AC/D. Both components maintain identical electrical specifications across input voltage range, output voltage, output current capacity, and switching frequency. The primary distinction is packaging format: the MAX635AC/D is supplied as a die component, while the MAX635ACSA+ is packaged in 8-SOIC form factor suitable for standard PCB assembly processes.

Selection of the MAX635ACSA+ is supported by its active product status, ROHS3 compliance, and REACH unaffected classification, ensuring long-term availability and regulatory alignment. The component is currently in stock with 1260 units available.

Frequently Asked Questions (FAQ)

Q: Can MAX635ACSA+ directly replace MAX635AC/D in existing designs?

A: Electrical substitution is valid based on identical specifications for output voltage, output current, input voltage range, and switching frequency. However, packaging differences require design modification. The MAX635AC/D die format requires hybrid assembly or direct die attachment, while MAX635ACSA+ uses standard 8-SOIC surface mount packaging compatible with conventional PCB assembly.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching: negative output voltage (-1.31V/-5V), 500mA output current capacity, 2.3V to 16.5V input range, 50kHz switching frequency, and 0°C to 70°C operating temperature. All parameters are identical between the main part and substitute.

Q: Why is the MAX635AC/D classified as obsolete?

A: Obsolescence status indicates the component is no longer in active production. The MAX635ACSA+ represents the current active offering from the manufacturer for this functional specification.

Q: Are there compliance or certification differences between the parts?

A: Both components maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both parts.

Q: What packaging considerations apply to the MAX635ACSA+?

A: The MAX635ACSA+ is supplied in 8-SOIC (0.154", 3.90mm width) surface mount package with tube packaging. Standard PCB assembly equipment and processes are compatible with this package format.