MAX1649ESA+ Equivalent & Substitute Parts

Part Overview

The MAX1649ESA+ is a buck regulator positive output step-down DC-DC controller IC manufactured by Analog Devices Inc./Maxim Integrated. This Surface Mount device in 8-SOIC packaging serves as a transistor driver for step-down voltage conversion applications. The part is Active in product status with 818 units currently in stock. Alternative models may be required due to inventory constraints, design optimization, or application-specific parameter matching in power management circuits.

Substiute Parts

MAX1649ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 896MAX1649ESA+ Datasheet

Current PartRFQ

MAX1649ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 896MAX1649ESA+ Datasheet

DirectRFQ

MAX1651ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1113MAX1651ESA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX1649ESA+ are identified based on strict parameter equivalence across the following critical specifications:

• Topology: Buck regulator configuration
• Output Type: Transistor driver function
• Output Configuration: Positive output
• Number of Outputs: Single output
• Output Phases: Single phase
• Voltage Supply Range: 3V ~ 16V
• Switching Frequency: Up to 300kHz
• Duty Cycle Maximum: 96.5%
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 8-SOIC Surface Mount
• Control Features: Enable function
• Compliance: ROHS3 Compliant

The MAX1651ESA+ meets all these parameters and qualifies as a parametric equivalent. Both parts share identical electrical specifications, thermal operating range, switching characteristics, and physical packaging requirements, making them interchangeable in applications requiring buck regulator controller functionality.

Parameter Comparison

Engineering Selection Recommendations

Both the MAX1649ESA+ and MAX1651ESA+ are Active products manufactured by Analog Devices Inc./Maxim Integrated with full ROHS3 compliance. Selection between these parts should be based on inventory availability and application requirements. The MAX1651ESA+ currently maintains higher inventory levels at 1069 units compared to 818 units for the MAX1649ESA+. Both parts carry identical electrical specifications, thermal ratings, and packaging dimensions, ensuring direct substitution capability in buck regulator controller applications. Compliance certifications including REACH Unaffected status and EAR99 ECCN classification are consistent across both parts.

Frequently Asked Questions (FAQ)

Q: Can MAX1651ESA+ directly replace MAX1649ESA+ in existing designs?

A: Yes. Both parts share identical electrical parameters including supply voltage range (3V ~ 16V), switching frequency (up to 300kHz), duty cycle maximum (96.5%), operating temperature range (-40°C ~ 85°C), and 8-SOIC package dimensions. Direct substitution is supported without circuit modification.

Q: Are there any package or pinout differences between these parts?

A: No. Both the MAX1649ESA+ and MAX1651ESA+ use identical 8-SOIC Surface Mount packaging with 0.154" width (3.90mm). Pinout and physical dimensions are equivalent.

Q: What compliance certifications apply to both substitute parts?

A: Both parts are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited). REACH status is Unaffected for both, and both carry EAR99 ECCN classification.

Q: Are both parts currently in active production?

A: Yes. Both MAX1649ESA+ and MAX1651ESA+ maintain Active product status with Analog Devices Inc./Maxim Integrated.

Q: What is the basis for substitution between these two part numbers?

A: Substitution is based on parametric equivalence across all critical electrical specifications: buck topology, positive output configuration, single-phase single-output design, identical supply voltage and switching frequency ranges, matching duty cycle ratings, and equivalent thermal operating ranges. Physical packaging and compliance certifications are also identical.