MAX1627ESA Buck Regulator Controller - Equivalent & Substitute Parts

Part Overview

The MAX1627ESA is a buck regulator positive output step-down DC-DC controller IC in 8-SOIC packaging, manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a transistor driver for step-down voltage conversion with a single output phase and fixed 300kHz switching frequency. The part is currently classified as obsolete, making identification of active equivalent alternatives essential for new designs and production continuity. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability.

Substiute Parts

MAX1627ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 1769MAX1627ESA Datasheet

Current PartRFQ

MAX1627ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1342MAX1627ESA+ Datasheet

DirectRFQ

MAX1626ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2046MAX1626ESA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX1627ESA are identified based on strict parameter equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Buck topology with single-phase, single-output configuration
• Voltage supply range of 3V ~ 16.5V
• Fixed 300kHz switching frequency
• 100% maximum duty cycle capability
• Transistor driver output type with enable control feature
• 8-SOIC surface mount package with 0.154" (3.90mm) width
• Operating temperature range of -40°C ~ 85°C
• No synchronous rectifier or clock sync functionality

Two substitute parts meet these criteria: MAX1627ESA+ (direct manufacturer upgrade) and MAX1626ESA+ (parametric equivalent). Both maintain identical electrical performance and mechanical compatibility while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts provide full electrical and mechanical compatibility with the MAX1627ESA. Selection between them depends on product status and regulatory compliance requirements.

MAX1627ESA+ is the direct manufacturer upgrade, maintaining the same base product number (MAX1627) while transitioning from obsolete to active product status. This part carries ROHS3 compliance certification, addressing environmental regulatory requirements absent in the original part. The direct lineage makes this the primary choice for designs requiring minimal qualification effort.

MAX1626ESA+ serves as a parametric equivalent alternative, based on the MAX1626 base product number. It delivers identical electrical performance and mechanical compatibility while also maintaining active product status and ROHS3 compliance. This option provides supply chain flexibility and may offer alternative availability channels through different distribution networks.

Both parts maintain identical inventory availability, packaging (Tube), and all critical electrical specifications including voltage supply range, switching frequency, duty cycle, and operating temperature range. Selection should be based on supply chain strategy, existing design documentation, and component procurement preferences.

Frequently Asked Questions (FAQ)

Q: Can MAX1627ESA+ be used as a direct replacement for MAX1627ESA in existing designs?

A: Yes. MAX1627ESA+ maintains identical electrical specifications, switching frequency (300kHz), voltage supply range (3V ~ 16.5V), duty cycle capability (100%), and 8-SOIC package dimensions. The only differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What is the difference between MAX1627ESA+ and MAX1626ESA+?

A: Both parts are parametric equivalents with identical electrical performance and 8-SOIC packaging. The primary difference is the base product number (MAX1627 vs. MAX1626). Both are active products with ROHS3 compliance. Selection depends on supply chain availability and design documentation preferences.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use 8-SOIC packaging with 0.154" (3.90mm) width. PCB footprints and land patterns are identical, enabling direct board-level substitution without layout modifications.

Q: Does the obsolete status of MAX1627ESA affect compatibility with the substitute parts?

A: No. Obsolete status indicates end-of-life for the original part, making substitutes necessary for new production. The substitute parts (MAX1627ESA+ and MAX1626ESA+) are active products with identical electrical and mechanical specifications, ensuring full functional compatibility.

Q: Are there any differences in control features or functionality?

A: No. All three parts feature identical control architecture with enable functionality, single-phase buck topology, and transistor driver output type. No functional differences exist between the main part and substitutes.

Q: What is the significance of ROHS3 compliance on the substitute parts?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. The original MAX1627ESA is RoHS non-compliant, while both substitutes (MAX1627ESA+ and MAX1626ESA+) are ROHS3 compliant. This is relevant for applications subject to environmental regulatory requirements in specific markets or industries.