MAX1655EEE Buck Regulator Controller - Equivalent & Substitute Parts

Part Overview

The MAX1655EEE is a buck regulator positive output step-down DC-DC controller IC manufactured by Analog Devices Inc./Maxim Integrated. This device functions as a transistor driver for step-down topology applications with a single output phase. The MAX1655EEE is classified as obsolete product status, which necessitates identification of equivalent substitute components for new designs and ongoing production requirements. Active equivalent parts are available to ensure design continuity and supply chain reliability.

Substiute Parts

MAX1655EEE

Analog Devices Inc./Maxim IntegratedIn Stock: 1986MAX1655EEE Datasheet

Current PartRFQ

MAX1655EEE+

Analog Devices Inc./Maxim IntegratedIn Stock: 4452MAX1655EEE+ Datasheet

DirectRFQ

MAX1653EEE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2244MAX1653EEE+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX1655EEE are identified based on strict electrical and mechanical parameter equivalence within the buck regulator controller category. The substitution logic is based on the following critical parameters:

Electrical Equivalence Criteria:

• Identical topology (Buck)
• Matching output configuration (Positive, single output, single phase)
• Identical voltage supply range (4.5V ~ 30V)
• Identical switching frequency options (150kHz, 300kHz)
• Matching duty cycle specification (98% maximum)
• Identical control features (Enable, Soft Start)
• Identical synchronous rectifier and clock sync capabilities
• Matching operating temperature range (-40°C ~ 85°C)

Mechanical Equivalence Criteria:

• Identical package type (16-SSOP, 0.154" width, 3.90mm)
• Identical supplier device package (16-QSOP)
• Surface mount mounting type

Identified Substitute Parts:

1. MAX1655EEE+ - Direct manufacturer equivalent with active product status and improved RoHS3 compliance
2. MAX1653EEE+ - Parametric equivalent with active product status, identical electrical specifications, and RoHS3 compliance

Both substitute parts meet all electrical and mechanical requirements for direct substitution in applications currently using the MAX1655EEE.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production:

The MAX1655EEE+ is the primary recommended substitute. This part maintains direct manufacturer lineage with the obsolete MAX1655EEE while offering active product status and ROHS3 compliance. The transition from RoHS non-compliant to ROHS3 compliant status aligns with current regulatory requirements and supply chain standards.

For Parametric Equivalence:

The MAX1653EEE+ serves as a parametric equivalent option. All electrical specifications and mechanical parameters match the MAX1655EEE exactly. This part is also active and ROHS3 compliant. The base product number differs (MAX1653 versus MAX1655), but functional equivalence is maintained across all specified parameters.

Compliance Considerations:

Both substitute parts achieve ROHS3 compliance, addressing the non-compliant status of the original MAX1655EEE. Both parts maintain REACH Unaffected status and identical moisture sensitivity levels. These compliance improvements support long-term design viability and regulatory adherence.

Frequently Asked Questions (FAQ)

Q: Can MAX1655EEE+ be used as a direct replacement for MAX1655EEE?

A: Yes. The MAX1655EEE+ is electrically and mechanically equivalent to the MAX1655EEE across all specified parameters. The primary difference is product status (Active versus Obsolete) and improved RoHS compliance.

Q: What is the difference between MAX1655EEE+ and MAX1653EEE+?

A: Both parts are parametric equivalents with identical electrical specifications and package configurations. The base product number differs (MAX1655 versus MAX1653), but all functional parameters, voltage ranges, switching frequencies, control features, and package types are identical. Both are active products with ROHS3 compliance.

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

A: Yes. All three parts use the 16-SSOP package with 0.154" width and 3.90mm dimensions. The supplier device package is 16-QSOP for all variants. PCB layout and footprints are compatible.

Q: Does the obsolete status of MAX1655EEE affect circuit functionality?

A: No. Obsolete status indicates the part is no longer manufactured and available inventory is limited. Functional performance remains unchanged. Substitution is necessary to ensure long-term supply chain continuity.

Q: Are there any thermal or performance differences between the substitute parts?

A: No. All three parts share identical operating temperature ranges (-40°C ~ 85°C), duty cycle specifications (98% maximum), and control feature sets. Thermal and performance characteristics are equivalent.

Q: What inventory status should be considered for production planning?

A: MAX1655EEE has 1900 pcs in stock (obsolete status). MAX1655EEE+ has 4400 pcs available (active). MAX1653EEE+ has 2200 pcs available (active). For ongoing production, MAX1655EEE+ or MAX1653EEE+ are recommended to ensure supply continuity.