MAX5071AASA Equivalent & Substitute Parts

Part Overview

The MAX5071AASA 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 device operates as a transistor driver with frequency control capabilities across a 20kHz to 1MHz switching frequency range. The MAX5071AASA is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Suitable alternatives must maintain compatibility with the 8-SOIC package format and core electrical specifications.

Substiute Parts

MAX5071AASA

Analog Devices Inc./Maxim IntegratedIn Stock: 1107MAX5071AASA Datasheet

Current PartRFQ

MAX5071AASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 888MAX5071AASA+ Datasheet

Parametric EquivalentRFQ

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

Substitute parts for the MAX5071AASA are selected based on strict parametric alignment across the following critical criteria:

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

Electrical Specifications: Substitutes must support the supply voltage range of 10.8V to 30V minimum, switching frequency operation from 20kHz to 1MHz, and maximum duty cycle of 96%. Operating temperature range must encompass -40°C to 125°C.

Functional Classification: Substitutes must function as PWM controllers or regulator controllers capable of flyback topology operation with positive output configuration.

Regulatory Compliance: All substitutes must maintain ROHS3 compliance and equivalent moisture sensitivity levels (MSL 1 - Unlimited).

The substitute parts identified—MAX5071AASA+, UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP—meet these parametric requirements and are available in active product status.

Parameter Comparison

Engineering Selection Recommendations

MAX5071AASA+ (Parametric Equivalent): This part is the direct parametric equivalent from Analog Devices, maintaining identical electrical specifications and package format. It carries active product status and ROHS3 compliance, making it the primary choice for direct replacement in existing designs. The only distinction is packaging format (Tube versus unspecified for the original).

UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, UC1845AMDREP (Texas Instruments Alternatives): These PWM controller ICs from Texas Instruments provide functional equivalence within the specified parameter ranges. All maintain 8-SOIC packaging, ROHS3 compliance, and active product status. UC1842AMDREP and UC1844AMDREP support the 10V minimum supply voltage matching the MAX5071AASA requirement. UC1843AMDREP and UC1845AMDREP operate at 7.9V minimum supply voltage, providing extended lower-voltage capability. All Texas Instruments alternatives feature expanded operating temperature range (-55°C to 125°C) compared to the original specification.

Selection between these alternatives depends on specific application requirements regarding minimum supply voltage and thermal operating conditions. All substitutes are certified for ROHS3 compliance and carry unlimited moisture sensitivity ratings (MSL 1).

Frequently Asked Questions (FAQ)

Q: Can MAX5071AASA+ be used as a direct replacement for MAX5071AASA?

A: Yes. MAX5071AASA+ is a parametric equivalent with identical electrical specifications, package format, and functional characteristics. The primary difference is packaging format (Tube). Both maintain ROHS3 compliance and support the same supply voltage range (10.8V ~ 30V) and operating temperature range (-40°C ~ 125°C).

Q: What are the key differences between the Analog Devices and Texas Instruments substitute options?

A: Analog Devices MAX5071AASA+ maintains exact parametric equivalence. Texas Instruments UC184x series parts provide functional PWM controller capability within compatible parameter ranges. Texas Instruments alternatives offer expanded operating temperature range (-55°C to 125°C) and some models support lower minimum supply voltages (7.9V for UC1843AMDREP and UC1845AMDREP versus 10V for UC1842AMDREP and UC1844AMDREP).

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes. All identified substitutes use the 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring direct PCB compatibility without layout modifications.

Q: Do all substitutes meet RoHS compliance requirements?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and maintain MSL 1 (Unlimited) moisture sensitivity ratings, matching the original MAX5071AASA specifications.

Q: Which substitute should be selected for new designs?

A: For new designs, MAX5071AASA+ is recommended as the primary choice due to parametric equivalence. Texas Instruments UC184x series parts are suitable alternatives when extended temperature range (-55°C operation) or lower minimum supply voltage (7.9V) capability is required for specific applications.