MAX1771CSA Equivalent & Substitute Parts

Part Overview

The MAX1771CSA is a Boost and Buck-Boost Regulator Controller IC manufactured by Analog Devices Inc./Maxim Integrated. This device functions as a transistor driver for step-up and step-up/step-down DC-DC conversion applications, delivering positive output with a single output phase. The MAX1771CSA is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and production requirements. Finding suitable alternatives ensures design continuity and supply chain reliability for applications requiring this topology and electrical performance.

Substiute Parts

MAX1771CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 3787MAX1771CSA Datasheet

Current PartRFQ

MAX1771CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2229MAX1771CSA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX1771CSA is determined by strict equivalence across the following critical parameters: package type (8-SOIC), topology (Boost and Buck-Boost), output configuration (positive, single phase), supply voltage range (3V ~ 16.5V), switching frequency (300kHz), maximum duty cycle (92%), and operating temperature range (0°C ~ 70°C). The substitute part must maintain identical electrical performance characteristics and physical form factor to ensure direct replacement capability without circuit redesign.

The MAX1771CSA+ qualifies as a direct substitute based on complete parameter alignment across all specified electrical and mechanical criteria. The primary distinction between these parts is product status and compliance certification, not functional or electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The MAX1771CSA+ is the direct equivalent substitute for the MAX1771CSA. Both parts share identical electrical specifications, switching characteristics, and physical packaging. The MAX1771CSA+ is preferred for new designs and ongoing production due to its active product status and ROHS3 compliance certification. The MAX1771CSA, classified as obsolete, should be replaced with the MAX1771CSA+ to ensure long-term supply chain availability and regulatory compliance with current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the MAX1771CSA+ be used as a direct replacement for the MAX1771CSA?

A: Yes. The MAX1771CSA+ is a direct substitute. Both parts are electrically and mechanically identical across all specified parameters, including package type, topology, supply voltage range, switching frequency, duty cycle, and operating temperature range.

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

A: The MAX1771CSA is obsolete, while the MAX1771CSA+ maintains active product status. Additionally, the MAX1771CSA+ is ROHS3 compliant, whereas the MAX1771CSA is RoHS non-compliant. Electrical performance and functionality are identical.

Q: Are there packaging differences between the MAX1771CSA and MAX1771CSA+?

A: No. Both parts use the same 8-SOIC package with 0.154" width (3.90mm). The MAX1771CSA+ is supplied in tube packaging, while the original part number does not specify packaging format.

Q: What applications are suitable for these parts?

A: These controllers are designed for boost and buck-boost DC-DC conversion applications requiring positive output, single-phase operation, and supply voltages between 3V and 16.5V. The 300kHz switching frequency and 92% maximum duty cycle define the performance envelope for power conversion circuits.

Q: Is the MAX1771CSA+ suitable for new product designs?

A: Yes. The MAX1771CSA+ is the recommended choice for new designs due to its active product status and ROHS3 compliance. It provides identical electrical performance to the obsolete MAX1771CSA while ensuring regulatory compliance and supply chain continuity.