MAX5070BASA-T Equivalent & Substitute Parts

Part Overview

The MAX5070BASA-T is a flyback regulator controller IC manufactured by Analog Devices Inc./Maxim Integrated, designed for step-up/step-down DC-DC conversion with isolation capability. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for new designs and production continuity. The device operates as a transistor driver with frequency control capabilities across a 10.8V to 30V supply range and supports switching frequencies from 20kHz to 1MHz.

Substiute Parts

MAX5070BASA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1220MAX5070BASA-T Datasheet

Current PartRFQ

MAX5070BASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 25103MAX5070BASA+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 of the MAX5070BASA-T is determined by the following critical parameters:

• Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
• Supply voltage range: 10.8V ~ 30V minimum overlap
• Switching frequency capability: 20kHz ~ 1MHz range
• Output type: Transistor driver for PWM control
• Topology: Flyback regulator controller
• Mounting type: Surface mount
• Environmental compliance: ROHS3 compliance and MSL rating

The substitute parts identified are active Texas Instruments PWM controller ICs from the UC184x series, which share the identical 8-SOIC package, overlapping supply voltage specifications, and compatible switching frequency ranges. These devices function as power supply controllers suitable for flyback topology applications.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete MAX5070BASA-T, the MAX5070BASA+T represents the direct equivalent from the same manufacturer with active product status. This part maintains identical electrical specifications and packaging while ensuring ongoing availability and manufacturer support.

For cross-manufacturer substitution, the Texas Instruments UC184x series (UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, UC1845AMDREP) provides compatible PWM controller functionality. All substitute parts share the 8-SOIC package, ROHS3 compliance, and MSL-1 rating. The UC1843AMDREP and UC1845AMDREP offer extended lower supply voltage operation at 7.9V minimum, compared to the 10V minimum of UC1842AMDREP and UC1844AMDREP. All Texas Instruments alternatives support the -55°C to 125°C operating temperature range, which exceeds the MAX5070BASA-T specification.

Selection should prioritize active product status and compliance certifications. The MAX5070BASA+T is the preferred choice for direct replacement. Texas Instruments alternatives are suitable where design flexibility permits cross-manufacturer qualification.

Frequently Asked Questions (FAQ)

Q: Can MAX5070BASA+T directly replace MAX5070BASA-T?

A: Yes. Both parts share identical electrical specifications, package type (8-SOIC), supply voltage range (10.8V ~ 30V), and operating temperature range (-40°C ~ 125°C). The primary difference is product status: MAX5070BASA-T is obsolete while MAX5070BASA+T is active. The packaging designation differs (standard vs. Tape & Reel), but the die and functionality are equivalent.

Q: What are the key differences between UC1842AMDREP and UC1843AMDREP?

A: Both are Texas Instruments PWM controllers in 8-SOIC packages with identical current supply (11 mA) and operating temperature range (-55°C ~ 125°C). UC1842AMDREP specifies 10V ~ 30V supply voltage, while UC1843AMDREP extends to 7.9V ~ 30V. UC1843AMDREP supports multiple topologies, whereas UC1842AMDREP is optimized for boost flyback applications.

Q: Are UC1844AMDREP and UC1845AMDREP interchangeable?

A: Both share the 8-SOIC package, 11 mA supply current, and -55°C ~ 125°C operating range. UC1844AMDREP operates at 10V ~ 30V supply voltage, while UC1845AMDREP extends to 7.9V ~ 30V. UC1844AMDREP targets boost flyback applications; UC1845AMDREP supports multiple topologies. Selection depends on minimum supply voltage requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. MAX5070BASA+T, UC1842AMDREP, UC1843AMDREP, UC1844AMDREP, and UC1845AMDREP are all ROHS3 compliant with MSL-1 (unlimited) moisture sensitivity ratings.

Q: What is the impact of different operating temperature ranges?

A: MAX5070BASA-T and MAX5070BASA+T specify -40°C ~ 125°C (junction temperature). Texas Instruments alternatives specify -55°C ~ 125°C (ambient temperature). The Texas Instruments range is wider at the lower end, providing additional margin for cold environment applications. Ambient temperature specifications are typically less stringent than junction temperature specifications.

Q: Can I use UC1843AMDREP or UC1845AMDREP in applications requiring 10.8V minimum supply?

A: Yes. Both UC1843AMDREP and UC1845AMDREP support 7.9V ~ 30V supply voltage, which encompasses the 10.8V ~ 30V requirement of MAX5070BASA-T. The lower minimum specification provides additional design flexibility without compromising compatibility.