{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX739CPD","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX739CPD","canonicalUrl":"https://icboms.com/analog-devices/MAX739CPD","factsUrl":"https://icboms.com/api/mcp/products/MAX739CPD","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX739CPD step-down buck regulator, fixed -5 V output, 500 mA, 185 kHz switching, through-hole 14-DIP (0.300\", 7.62 mm), bulk package.","salesMarkdown":"## Fixed -5 V buck — a negative-rail specialist The MAX739CPD is a step-down (buck) switching regulator from Maxim Integrated that outputs a fixed -5 V from a positive input rail spanning 4 V to 11 V. This is not a generic positive buck — the output configuration is negative, so it is designed to generate a clean -5 V rail for op-amp supplies, analog front-ends, or bias circuits that need a negative voltage from a single positive source. Rated for 500 mA continuous output, the part switches at 185 kHz — a relatively low frequency that keeps the internal MOSFET switching losses modest but demands larger external inductor and capacitor values than a modern 500 kHz+ regulator. The absence of a synchronous rectifier means an external Schottky diode is required; its forward drop and thermal rating directly set the converter's efficiency, especially at higher input voltages near 11 V. ## Through-hole DIP — bench-friendly, not board-density The DIP form factor simplifies prototyping on perfboard or breadboard, and the 0.100\" pin pitch is easy to hand-solder or socket. For a production board, the 14-PDIP footprint is larger than a surface-mount equivalent, but it is also easier to rework and inspect — a trade-off that suits low-volume or lab-bench builds. This part is not rated for industrial enclosures, automotive under-hood, or outdoor telecom cabinets.","metaTitle":"MAX739CPD Step-Down Buck Regulator, -5V Fixed, 500mA, 14-DIP","metaDescription":"MAX739CPD active step-down buck regulator from Maxim Integrated. Fixed -5V output, 500mA, 185kHz switching, 14-DIP through-hole. RoHS non-compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Package":"Bulk","Function":"Step-Down","Topology":"Buck","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Current - Output":"500mA","Number of Outputs":"1","Output Configuration":"Negative","Frequency - Switching":"185kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Voltage - Input (Max)":"11V","Voltage - Input (Min)":"4V","Supplier Device Package":"14-PDIP","Voltage - Output (Min/Fixed)":"-5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.75","stockQuantity":0,"priceTiers":[{"qty":80,"price":"$3.75000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/380f0a803acd2e0801cc2e03f525e044.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does the fixed -5 V output mean for my circuit?","answer":"The MAX739CPD generates a regulated -5 V from a positive input of 4 V to 11 V. This is a negative-rail output — the ground reference is the input return, and the output sits 5 V below that. It is designed to power op-amps, ADCs, or other analog circuits that need a negative supply, not to replace a positive 5 V regulator."},{"question":"Why is the MAX739CPD RoHS non-compliant, and does it matter?","answer":"The part contains lead or another restricted substance above the RoHS threshold. For any BOM that must meet EU RoHS, China RoHS, or similar green-manufacturing standards, this part is excluded unless a specific exemption applies. If the rest of the assembly is lead-free, the MAX739CPD will cause the entire board to fail RoHS compliance testing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX739CPD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX739CPD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}