MAX5019CSA+ Equivalent & Substitute Parts

Part Overview

The MAX5019CSA+ is a Flyback Regulator Controller IC manufactured by Analog Devices Inc./Maxim Integrated, designed for positive, isolation-capable output applications in step-up/step-down DC-DC conversion topologies. This device operates as a transistor driver with a single output phase and is currently classified as "Not For New Designs," making identification of suitable alternatives essential for ongoing production and maintenance applications.

Substiute Parts

MAX5019CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2099MAX5019CSA+ Datasheet

Current PartRFQ

MAX17499BAUB+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1169MAX17499BAUB+T Datasheet

MFR RecommendedRFQ

MAX5014CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1060MAX5014CSA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX5019CSA+ are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Output configuration (Positive, Isolation Capable)
• Topology classification (Flyback, Boost, or SEPIC)
• Function capability (Step-Up/Step-Down conversion)
• Output type (Transistor Driver)
• Supply voltage range overlap
• Package compatibility or functional equivalence
• RoHS and compliance status

Substitute Categories:

MFR Recommended Substitute: MAX17499BAUB+T represents the manufacturer-recommended alternative, offering extended functionality with Boost and SEPIC topology support while maintaining positive, isolation-capable output configuration. This part is classified as Active product status, making it suitable for new designs and ongoing production.

Parametric Equivalent: MAX5014CSA+ provides direct parametric equivalence with identical topology (Flyback), function (Step-Up/Step-Down), and package format (8-SOIC). This part maintains the same electrical specifications and control features as the MAX5019CSA+, differing only in base product designation.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Specifications): Select MAX5014CSA+ when maintaining existing designs with Flyback topology requirements. This part provides parametric equivalence with identical supply voltage range (13V ~ 36V), switching frequency (275kHz), duty cycle (85%), and 8-SOIC package format. Both parts share "Not For New Designs" status and identical control features (Enable, Soft Start). This substitution requires no circuit redesign.

For New Designs and Long-Term Availability: Select MAX17499BAUB+T as the manufacturer-recommended alternative. This part carries Active product status, ensuring long-term availability and support. The extended operating temperature range (-40°C ~ 125°C) and programmable switching frequency (50kHz ~ 2.5MHz) provide design flexibility. The supply voltage range (9.5V ~ 24V) overlaps with the original specification, though the upper limit is reduced to 24V. The 10-TFSOP/10-MSOP package requires PCB layout modification but maintains surface mount compatibility. This selection is appropriate for applications requiring future-proof component sourcing.

Compliance Considerations: All three parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment across substitution options.

Frequently Asked Questions (FAQ)

Q: Can MAX5014CSA+ be used as a direct replacement for MAX5019CSA+? A: Yes. MAX5014CSA+ is a parametric equivalent with identical topology (Flyback), function (Step-Up/Step-Down), supply voltage range (13V ~ 36V), switching frequency (275kHz), duty cycle (85%), and 8-SOIC package. No circuit modifications are required.

Q: What are the key differences between MAX5019CSA+ and MAX17499BAUB+T? A: MAX17499BAUB+T supports additional topologies (Boost and SEPIC) beyond Flyback, operates across a wider temperature range (-40°C ~ 125°C versus 0°C ~ 70°C), features programmable switching frequency (50kHz ~ 2.5MHz versus fixed 275kHz), and uses a 10-pin package (10-TFSOP/10-MSOP) instead of 8-SOIC. The supply voltage upper limit is reduced from 36V to 24V. These differences require circuit evaluation and PCB redesign.

Q: Why is MAX5019CSA+ marked "Not For New Designs"? A: This designation indicates the part is in mature or end-of-life phase. For new product development, Analog Devices recommends MAX17499BAUB+T as the forward-compatible alternative.

Q: Are all three parts RoHS compliant? A: Yes. MAX5019CSA+, MAX17499BAUB+T, and MAX5014CSA+ are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the impact of package size difference between 8-SOIC and 10-TFSOP? A: The 8-SOIC package (0.154" width, 3.90mm) differs from the 10-TFSOP package (0.118" width, 3.00mm). Substituting MAX17499BAUB+T requires PCB layout modification to accommodate the different pin count and footprint. MAX5014CSA+ maintains identical 8-SOIC packaging, eliminating layout concerns.

Q: Can MAX17499BAUB+T operate at 36V supply voltage? A: No. MAX17499BAUB+T maximum supply voltage is 24V, compared to 36V for MAX5019CSA+. Applications requiring 36V operation must use MAX5019CSA+ or MAX5014CSA+.

Q: What is the inventory status for these parts? A: MAX5019CSA+ has 2000 pcs in stock, MAX17499BAUB+T has 1140 pcs in stock, and MAX5014CSA+ has 1046 pcs in stock.