MAX858CSA+ Equivalent & Substitute Parts

Part Overview

The MAX858CSA+ is a boost switching regulator IC manufactured by Analog Devices Inc./Maxim Integrated, designed for step-up voltage conversion applications. This positive programmable regulator delivers 125mA output current with selectable output voltages of 3.3V or 5V, operating from input voltages between 0.8V and 6V. The device is currently in active production status and maintains full compliance with RoHS3 and REACH regulations. Alternative part sourcing becomes necessary when primary inventory is unavailable or when supply chain diversification is required for production continuity.

Substiute Parts

MAX858CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 988MAX858CSA+ Datasheet

Current PartRFQ

MAX858CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 988MAX858CSA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX858CSA+ is determined by strict equivalence across the following critical parameters:

• Topology & Function: Boost switching regulator with step-up conversion capability
• Output Configuration: Single positive output with programmable voltage selection
• Voltage Specifications: Input range 0.8V to 6V; output voltages 3.3V and 5V
• Current Rating: 125mA switch current output
• Switching Frequency: 500kHz operation
• Package Compatibility: 8-SOIC surface mount package (0.154", 3.90mm width)
• Regulatory Compliance: RoHS3 and REACH compliance required
• Product Status: Active production status

Only parts meeting all these parameters without deviation qualify as direct substitutes. The MAX858CSA+ itself represents the complete substitute group for this application requirement.

Parameter Comparison

Engineering Selection Recommendations

The MAX858CSA+ maintains active production status with full regulatory compliance across RoHS3 and REACH standards. The device carries MSL Level 1 rating, indicating unlimited moisture sensitivity protection and suitability for standard storage and handling conditions. Selection of this part is supported by its established compliance certifications and continuous availability through authorized distribution channels. The 8-SOIC package format ensures compatibility with standard surface mount assembly processes and PCB layouts designed for this footprint.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the MAX858CSA+? A: A valid substitute must match all critical parameters: boost topology, single positive programmable output, 0.8V to 6V input range, 3.3V/5V output selection, 125mA output current, 500kHz switching frequency, 8-SOIC package, and active product status with RoHS3/REACH compliance.

Q: Can the MAX858CSA+ be replaced with a different package variant? A: No. The 8-SOIC (0.154", 3.90mm width) package is a fixed requirement. Different package types are not interchangeable without PCB redesign and re-qualification.

Q: Is the programmable output voltage feature essential for substitution? A: Yes. The programmable output type allowing selection between 3.3V and 5V is a core functional requirement. Fixed-output regulators do not qualify as substitutes.

Q: What is the significance of the 500kHz switching frequency? A: The 500kHz frequency determines component selection for external inductors and capacitors, as well as EMI characteristics. Substitutes must operate at this identical frequency to maintain circuit performance and filtering effectiveness.

Q: Does the absence of a synchronous rectifier affect substitute selection? A: Yes. The non-synchronous rectifier configuration is a defining characteristic. Parts with integrated synchronous rectifiers have different efficiency profiles and control requirements, making them unsuitable substitutes.

Q: Are there alternative manufacturers offering equivalent parts? A: Based on the provided specifications, no alternative manufacturers are listed. The MAX858CSA+ represents the sole part meeting all stated requirements.

Q: What is the importance of MSL Level 1 rating? A: MSL Level 1 indicates unlimited shelf life without moisture baking requirements, reducing handling complexity and enabling flexible inventory management without time-sensitive constraints.