MAX5070BASA Equivalent & Substitute Parts

Part Overview

The MAX5070BASA is a Flyback Regulator Controller IC manufactured by Analog Devices Inc./Maxim Integrated, designed for positive, isolation-capable step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with frequency control capabilities across a 20kHz to 1MHz switching frequency range. The MAX5070BASA is currently classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing design support and production continuity. Substitute parts must maintain compatibility with the core electrical specifications and 8-SOIC surface mount package format.

Substiute Parts

MAX5070BASA

Analog Devices Inc./Maxim IntegratedIn Stock: 3845MAX5070BASA Datasheet

Current PartRFQ

MAX5070BASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1140MAX5070BASA+ 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

Substitute parts for the MAX5070BASA are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Package format: 8-SOIC (0.154", 3.90mm Width) surface mount
• Supply voltage range: 10.8V ~ 30V minimum overlap
• Switching frequency capability: 20kHz ~ 1MHz range
• Output type: Transistor driver configuration
• Topology: Flyback regulator controller
• RoHS3 compliance and MSL Level 1 rating

Substitute Categories:

Direct Manufacturer Equivalent: MAX5070BASA+ is the active production variant of the MAX5070 base product, maintaining identical electrical specifications and package format while differing only in product status (Active vs. Obsolete) and packaging method (Tube vs. standard).

Cross-Manufacturer Alternatives: UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP are Texas Instruments PWM controller ICs that meet the core substitution criteria of 8-SOIC packaging, compatible supply voltage ranges, and flyback topology support. These devices function as PWM controllers suitable for boost flyback applications with equivalent switching frequency capabilities.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MAX5070BASA+ is the preferred substitute for MAX5070BASA applications. This part maintains identical electrical specifications, package format, and thermal operating range while offering active product status and ongoing manufacturer support. The transition from MAX5070BASA to MAX5070BASA+ requires no circuit redesign and provides direct functional equivalence.

Secondary Recommendations: UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP are viable cross-manufacturer alternatives when MAX5070BASA+ availability is constrained. All four Texas Instruments devices meet the core substitution criteria of 8-SOIC packaging, compatible supply voltage ranges, and PWM controller functionality for flyback topologies. These parts carry active product status and ROHS3 compliance certification.

Compliance Considerations: All substitute parts listed maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements. Operating temperature ranges for Texas Instruments alternatives extend to -55°C, providing enhanced low-temperature performance compared to the MAX5070BASA specification of -40°C minimum.

Frequently Asked Questions (FAQ)

Q: Can MAX5070BASA+ be used as a direct replacement for MAX5070BASA?

A: Yes. MAX5070BASA+ is the active production equivalent of MAX5070BASA, maintaining identical electrical specifications, package format (8-SOIC), supply voltage range (10.8V ~ 30V), and thermal operating range (-40°C ~ 125°C). No circuit modifications are required.

Q: What are the key differences between MAX5070BASA and the Texas Instruments UC184x series substitutes?

A: Both device families function as PWM controllers for flyback topologies in 8-SOIC packages with compatible supply voltage ranges. Texas Instruments alternatives offer extended low-temperature operation (-55°C vs. -40°C) and specified supply current ratings (11 mA). Functional equivalence is maintained across the specified switching frequency and duty cycle parameters.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MAX5070BASA+, UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP all carry ROHS3 compliance certification and MSL Level 1 rating.

Q: What is the significance of the product status difference between MAX5070BASA (Obsolete) and MAX5070BASA+ (Active)?

A: Product status indicates manufacturer support and availability. MAX5070BASA is obsolete and no longer in active production. MAX5070BASA+ is the current production part with ongoing manufacturer support, making it the recommended choice for new designs and production continuity.

Q: Can UC1843AMDREP and UC1845AMDREP be used interchangeably with UC1842AMDREP and UC1844AMDREP?

A: All four Texas Instruments parts meet the core substitution criteria for MAX5070BASA replacement. UC1843AMDREP and UC1845AMDREP support a lower minimum supply voltage (7.9V vs. 10V), while UC1842AMDREP and UC1844AMDREP require minimum 10V supply. Selection depends on specific circuit supply voltage requirements.

Q: What packaging options are available for substitute parts?

A: MAX5070BASA+ is supplied in Tube packaging. Texas Instruments alternatives are available in Cut Tape (CT) & Digi-Reel® (UC1843AMDREP, UC1844AMDREP, UC1845AMDREP) or Tape & Reel (TR) (UC1842AMDREP) formats. All maintain the 8-SOIC package format.