MAX1771ESA Equivalent & Substitute Parts

Part Overview

The MAX1771ESA is a Boost, Buck-Boost Regulator controller IC manufactured by Analog Devices Inc./Maxim Integrated. This device functions as a positive output step-up and step-up/step-down DC-DC controller in an 8-SOIC surface mount package. The MAX1771ESA is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The controller operates across a 3V to 16.5V supply voltage range with a 300kHz switching frequency and supports enable control features.

Substiute Parts

MAX1771ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 17375MAX1771ESA Datasheet

Current PartRFQ

MAX1771ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1441MAX1771ESA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1771ESA is determined by strict equivalence across the following critical parameters:

• Output type and function (Transistor Driver; Step-Up, Step-Up/Step-Down)
• Output configuration and topology (Positive; Boost, Buck-Boost)
• Electrical specifications (3V ~ 16.5V supply, 300kHz switching frequency, 92% max duty cycle)
• Single output, single phase configuration
• Control features (Enable function)
• Operating temperature range (-40°C ~ 85°C)
• Package type and dimensions (8-SOIC, 0.154" width, 3.90mm)
• Moisture sensitivity level (MSL 1)

The MAX1771ESA+ is a direct substitute manufactured by the same supplier. It maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MAX1771ESA+ is the direct equivalent for the obsolete MAX1771ESA. Both parts share identical electrical performance and mechanical compatibility. The MAX1771ESA+ is preferred for new designs and production applications due to its active product status and ROHS3 compliance certification. The original MAX1771ESA, classified as obsolete, presents supply chain risk and does not meet current environmental compliance standards. Selection of the MAX1771ESA+ eliminates obsolescence concerns while maintaining full functional and pin-level compatibility with existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the MAX1771ESA+ be used as a direct replacement for the MAX1771ESA?

A: Yes. The MAX1771ESA+ is a direct equivalent. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical specifications, switching frequency, duty cycle, supply voltage range, operating temperature, and 8-SOIC package dimensions. Pin-level compatibility is maintained.

Q: What is the primary difference between these two parts?

A: The MAX1771ESA is obsolete, while the MAX1771ESA+ maintains active product status. The MAX1771ESA+ also meets ROHS3 compliance, whereas the original MAX1771ESA is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are there any package or mounting differences?

A: No. Both parts use the same 8-SOIC surface mount package with 0.154" width and 3.90mm dimensions. Moisture sensitivity level (MSL 1) is identical for both variants.

Q: Why should I transition from MAX1771ESA to MAX1771ESA+?

A: The MAX1771ESA is classified as obsolete, creating supply availability and long-term sourcing challenges. The MAX1771ESA+ is actively manufactured and meets modern environmental compliance requirements (ROHS3). For new designs and ongoing production, the MAX1771ESA+ is the appropriate selection.

Q: Are the control features identical between both parts?

A: Yes. Both the MAX1771ESA and MAX1771ESA+ include enable control features and operate with identical switching frequency (300kHz), maximum duty cycle (92%), and single-phase, single-output configuration.