MAX5070AASA-T Equivalent & Substitute Parts

Part Overview

The MAX5070AASA-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 conversion applications. This device 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. Substitute parts must maintain compatibility with the 8-SOIC package format and support the same voltage supply range (10.8V to 30V) and operating temperature specifications.

Substiute Parts

MAX5070AASA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1177MAX5070AASA-T Datasheet

Current PartRFQ

MAX5070AASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 991MAX5070AASA+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 MAX5070AASA-T is determined by strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Package format: 8-SOIC (0.154", 3.90mm Width) — mandatory for PCB layout compatibility
• Supply voltage range: Minimum 10.8V to 30V maximum — ensures operation within specified input conditions
• Topology: Flyback controller with step-up/step-down capability — maintains functional equivalence
• Output type: Transistor driver — preserves gate drive characteristics
• Switching frequency range: 20kHz to 1MHz — supports design frequency selection
• Duty cycle maximum: 96% — ensures power conversion efficiency specifications
• Operating temperature: -40°C to 125°C — maintains thermal performance envelope
• RoHS3 compliance and MSL Level 1 — ensures regulatory and environmental compatibility

The substitute parts listed below meet all these criteria within their specified operating ranges.

Parameter Comparison

Engineering Selection Recommendations

MAX5070AASA+T — Direct Analog Devices equivalent with identical electrical specifications and 8-SOIC packaging. This part carries active product status and maintains full compatibility with MAX5070AASA-T designs. Packaging is supplied as Tape & Reel (TR) format. ROHS3 compliant with MSL Level 1 rating.

UC1842AMDREP — Texas Instruments PWM controller with 8-SOIC package compatibility. Supply voltage range 10V to 30V encompasses the MAX5070AASA-T specification. Operating temperature extends to -55°C, exceeding the -40°C minimum requirement. Active product status ensures long-term availability. ROHS3 compliant with MSL Level 1 rating.

UC1843AMDREP — Texas Instruments PWM controller with 8-SOIC package compatibility. Supply voltage range 7.9V to 30V provides extended lower-voltage operation beyond the MAX5070AASA-T minimum of 10.8V. Operating temperature extends to -55°C. Active product status with ROHS3 compliance and MSL Level 1 rating.

UC1844AMDREP — Texas Instruments PWM controller with 8-SOIC package compatibility. Supply voltage range 10V to 30V aligns with MAX5070AASA-T specifications. Operating temperature extends to -55°C. Active product status with ROHS3 compliance and MSL Level 1 rating.

UC1845AMDREP — Texas Instruments PWM controller with 8-SOIC package compatibility. Supply voltage range 7.9V to 30V provides extended lower-voltage operation. Operating temperature extends to -55°C. Active product status with ROHS3 compliance and MSL Level 1 rating.

All substitute parts maintain surface mount compatibility, RoHS3 compliance, and MSL Level 1 moisture sensitivity ratings. Selection should be based on specific supply voltage requirements and thermal operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Why is the MAX5070AASA-T listed as obsolete? A: The MAX5070AASA-T has reached end-of-life status. Active alternatives with equivalent electrical and mechanical specifications are available from both Analog Devices and Texas Instruments to support design continuity.

Q: Can MAX5070AASA+T be used as a direct replacement for MAX5070AASA-T? A: Yes. MAX5070AASA+T is the active equivalent from Analog Devices with identical electrical specifications, 8-SOIC package format, and supply voltage range (10.8V to 30V). The primary difference is packaging format (Tape & Reel versus the original format) and active product status.

Q: What is the key difference between UC1842AMDREP and UC1843AMDREP? A: Both are 8-SOIC PWM controllers with identical current supply (11 mA) and operating temperature range (-55°C to 125°C). UC1842AMDREP specifies a supply voltage range of 10V to 30V, while UC1843AMDREP extends the lower limit to 7.9V, providing broader input voltage flexibility.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL Level 1 moisture sensitivity ratings, meeting current environmental and regulatory requirements.

Q: Does package format affect substitution eligibility? A: All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package format, ensuring direct PCB layout compatibility. Packaging delivery format (Tape & Reel, Cut Tape, or Digi-Reel) does not affect electrical or mechanical substitution eligibility.

Q: What supply voltage range should I use for part selection? A: The MAX5070AASA-T operates from 10.8V to 30V. UC1842AMDREP and UC1844AMDREP maintain this range. UC1843AMDREP and UC1845AMDREP extend operation to 7.9V minimum, suitable for applications requiring lower input voltage support.

Q: Can I use a substitute part with a lower operating temperature minimum than -40°C? A: Yes. All Texas Instruments substitutes specify -55°C minimum operating temperature, which exceeds the MAX5070AASA-T requirement of -40°C. This provides additional thermal margin for cold-environment applications.