MAX5071AASA-T Equivalent & Substitute Parts

Part Overview

The MAX5071AASA-T is a flyback regulator controller IC manufactured by Analog Devices Inc./Maxim Integrated, designed for positive, isolation-capable step-up/step-down DC-DC applications. This component operates as a transistor driver with frequency control capabilities across a 20kHz to 1MHz switching frequency range. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and production continuity. Direct manufacturer variants and cross-compatible Texas Instruments PWM controller alternatives provide viable replacement options that maintain functional and electrical compatibility.

Substiute Parts

MAX5071AASA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1272MAX5071AASA-T Datasheet

Current PartRFQ

MAX5071AASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1053MAX5071AASA+T Datasheet

DirectRFQ

UC1842AMDREP

Texas InstrumentsIn Stock: 2758UC1842AMDREP Datasheet

MFR RecommendedRFQ

UC1843AMDREP

Texas InstrumentsIn Stock: 1508UC1843AMDREP Datasheet

MFR RecommendedRFQ

UC1844AMDREP

Texas InstrumentsIn Stock: 1330UC1844AMDREP Datasheet

MFR RecommendedRFQ

UC1845AMDREP

Texas InstrumentsIn Stock: 1830UC1845AMDREP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX5071AASA-T is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) surface mount package to ensure PCB footprint compatibility without layout modifications.

Electrical Specifications: Substitute parts must support the supply voltage range of 10.8V to 30V minimum and maintain switching frequency operation within or overlapping the 20kHz to 1MHz range. The duty cycle maximum of 96% establishes the upper performance boundary.

Functional Classification: Substitute parts must operate as PWM controllers or flyback regulator controllers capable of driving transistor outputs in step-up/step-down topologies with positive, isolation-capable output configurations.

Compliance & Certification: All substitute parts must maintain ROHS3 compliance and MSL 1 rating to satisfy manufacturing and environmental requirements equivalent to the original component.

The MAX5071AASA+T (direct variant with active product status) and the Texas Instruments UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP series meet these substitution criteria through matching package geometry, overlapping electrical operating ranges, and compatible PWM controller functionality.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - MAX5071AASA+T: This direct variant from Analog Devices Inc./Maxim Integrated is the preferred replacement for the obsolete MAX5071AASA-T. It maintains identical electrical specifications, package geometry, and functional characteristics while offering active product status and ongoing manufacturer support. This option eliminates cross-manufacturer compatibility considerations and preserves original design intent.

Cross-Manufacturer Alternatives - Texas Instruments UC Series: The UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP controllers provide functionally equivalent PWM control capabilities within the 8-SOIC package. All four variants maintain ROHS3 compliance and MSL 1 certification. The UC1843AMDREP and UC1845AMDREP offer extended lower supply voltage operation (7.9V minimum) compared to the original specification (10.8V minimum), while UC1842AMDREP and UC1844AMDREP maintain the 10V minimum threshold. All variants support the required 10V to 30V supply range overlap and operate across extended temperature ranges (-55°C to 125°C), providing enhanced thermal margin beyond the original -40°C to 125°C specification.

Product Status Consideration: All recommended substitutes maintain active product status with established supply chains and manufacturer support, ensuring long-term availability and design continuity for applications currently using the obsolete MAX5071AASA-T.

Frequently Asked Questions (FAQ)

Q: Can MAX5071AASA+T be used as a direct drop-in replacement for MAX5071AASA-T?

A: Yes. The MAX5071AASA+T is a direct variant with identical electrical specifications, package configuration, and functional characteristics. No circuit modifications are required.

Q: What are the key differences between the Analog Devices MAX5071 and Texas Instruments UC184x series?

A: Both device families operate as PWM controllers in the 8-SOIC package with ROHS3 compliance and MSL 1 ratings. The primary differences are manufacturer origin and minor variations in minimum supply voltage thresholds. UC1843AMDREP and UC1845AMDREP support 7.9V minimum supply, while UC1842AMDREP and UC1844AMDREP require 10V minimum, matching the original MAX5071AASA-T specification more closely.

Q: Are all substitute parts pin-compatible with the original MAX5071AASA-T?

A: All substitute parts use the 8-SOIC package with identical physical dimensions (0.154", 3.90mm Width). Pin-level compatibility must be verified against detailed pinout documentation for your specific application topology, as PWM controller pin assignments may vary between manufacturers.

Q: Which substitute should be selected for new designs?

A: The MAX5071AASA+T is recommended for designs requiring exact functional equivalence to the original MAX5071AASA-T. Texas Instruments UC184x alternatives are suitable when cross-manufacturer sourcing flexibility is required or when extended temperature operating range (-55°C to 125°C) provides design margin benefits.

Q: Do all substitutes maintain the same switching frequency range?

A: The original MAX5071AASA-T operates across 20kHz to 1MHz. Texas Instruments UC184x series controllers support PWM operation within compatible frequency ranges. Specific frequency capability must be confirmed against individual device datasheets for your application requirements.

Q: What compliance certifications apply to all substitute options?

A: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original component's environmental and manufacturing certifications.