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 step-up/step-down DC-DC conversion applications. This device operates with a supply voltage range of 13V to 36V and features a fixed switching frequency of 275kHz with an 85% maximum duty cycle. The MAX5019CSA is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design considerations.

Substiute Parts

MAX5019CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 760MAX5019CSA 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 or compatible topologies)
• Function capability (Step-Up/Step-Down conversion)
• Supply voltage range compatibility (13V ~ 36V minimum overlap)
• Output type (Transistor Driver)
• Control features (Enable, Soft Start capability)
• RoHS3 compliance and regulatory alignment

Substitute Categories:

1. Parametric Equivalent (MAX5014CSA+): Identical topology, function, and electrical specifications with matching 8-SOIC package. Differs only in product status and packaging format.

2. Functional Alternative (MAX17499BAUB+T): Supports boost and SEPIC topologies with positive, isolation-capable output configuration. Operates within overlapping supply voltage range (9.5V ~ 24V) and provides comparable control features. Packaged in 10-uMAX/uSOP format with active product status.

Parameter Comparison

Engineering Selection Recommendations

MAX5014CSA+ (Parametric Equivalent): This part provides direct electrical and functional equivalence to the MAX5019CSA with identical topology, supply voltage range, switching frequency, and duty cycle specifications. Both devices are packaged in 8-SOIC format and support the same control features. The MAX5014CSA+ is classified as "Not For New Designs," indicating limited long-term availability. Selection of this substitute is appropriate for legacy system maintenance where pin-for-pin compatibility and identical electrical performance are required. Both parts maintain ROHS3 compliance.

MAX17499BAUB+T (Functional Alternative): This device offers an active product status with extended operating temperature range (-40°C to 125°C) and broader switching frequency capability (50kHz to 2.5MHz). The MAX17499BAUB+T supports boost and SEPIC topologies in addition to step-up/step-down conversion, providing greater design flexibility. The supply voltage range (9.5V ~ 24V) overlaps with the MAX5019CSA specification but does not extend to the full 36V upper limit. This substitute is suitable for new designs requiring positive, isolation-capable output conversion with active manufacturer support. The 10-uMAX/uSOP package requires PCB layout modification compared to the 8-SOIC footprint. ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can MAX5014CSA+ be used as a direct replacement for MAX5019CSA? A: Yes. The MAX5014CSA+ is a parametric equivalent with identical electrical specifications, topology, and 8-SOIC packaging. Pin-for-pin substitution is possible without circuit modification.

Q: What are the key differences between MAX5019CSA and MAX17499BAUB+T? A: The MAX17499BAUB+T differs in topology (supports Boost and SEPIC in addition to flyback), supply voltage upper limit (24V vs. 36V), switching frequency range (50kHz ~ 2.5MHz vs. fixed 275kHz), maximum duty cycle (75% vs. 85%), and package format (10-uMAX/uSOP vs. 8-SOIC). The MAX17499BAUB+T offers active product status and extended temperature range.

Q: Is the MAX17499BAUB+T suitable for applications requiring 36V supply voltage? A: No. The MAX17499BAUB+T maximum supply voltage is 24V. Applications requiring operation at 36V must use MAX5019CSA or MAX5014CSA+.

Q: What packaging considerations apply when substituting MAX17499BAUB+T? A: The MAX17499BAUB+T uses 10-uMAX/uSOP packaging (0.118", 3.00mm width) compared to the 8-SOIC format (0.154", 3.90mm width) of the MAX5019CSA. PCB layout and footprint redesign is required.

Q: Are all substitute parts ROHS3 compliant? A: Yes. MAX5014CSA+ and MAX17499BAUB+T both maintain ROHS3 compliance, matching the environmental standards of the MAX5019CSA.

Q: Which substitute is recommended for new designs? A: The MAX17499BAUB+T is the only active product among the substitutes, making it the appropriate choice for new designs. Applications with specific requirements for 36V supply voltage or fixed 275kHz operation must evaluate design constraints against available alternatives.