{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX635ACSA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX635ACSA","canonicalUrl":"https://icboms.com/analog-devices/MAX635ACSA","factsUrl":"https://icboms.com/api/mcp/products/MAX635ACSA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX635ACSA+ inverting buck regulator, 500 mA output, 50 kHz switching frequency, adjustable output down to -5 V, 8-SOIC surface-mount package, tube.","salesMarkdown":"## Inverting buck regulator for negative rail generation The MAX635ACSA+ is an inverting buck (step-down) regulator from Analog Devices that produces a negative output voltage from a positive input rail — a less common topology than the standard positive buck, but essential when a circuit needs a -5 V or adjustable negative bias from a 5 V or 12 V supply. Rated for 500 mA continuous output current, it handles the bias rail for an op-amp front-end, a small LCD contrast supply, or the negative supply in a mixed-signal board where the positive rail is already regulated. The switching frequency is 50 kHz — low enough that the inductor and output capacitor are physically larger than what a modern 500 kHz+ part would need, but the trade-off is lower switching losses and cleaner output ripple for noise-sensitive analog loads. ## Input range and output flexibility The output is adjustable down to -1.31 V minimum, with a fixed -5 V option available by tying the feedback pin appropriately — the datasheet shows the resistor divider values for any intermediate voltage. The single output is configured as a negative rail, meaning the load connects between the output pin and ground, not between output and input — a common gotcha for engineers used to positive buck converters. ## Package and thermal considerations for 500 mA The commercial temperature grade (0°C to 70°C ambient) limits the part to indoor, temperature-controlled environments — not suitable for automotive, industrial enclosures without HVAC, or outdoor telecom cabinets where the internal temperature can exceed 70°C. Without synchronous rectification, the external Schottky diode carries the inductor current during the off-time — its forward voltage and thermal rating must be selected to match the 500 mA output and the switching frequency. ## Active production and compliance status It carries ROHS3 compliance, meaning it meets the current European Union restriction on hazardous substances — no exemptions for lead in solder or cadmium in plating.","metaTitle":"MAX635ACSA+ Analog Devices Inverting Buck Regulator, 500mA","metaDescription":"MAX635ACSA+ inverting buck regulator from Analog Devices. 500 mA output, 50 kHz switching, 8-SOIC package. Active production, ROHS3 compliant. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down/Inverted","Topology":"Buck","Output Type":"Adjustable (Fixed)","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Output":"500mA","Number of Outputs":"1","Output Configuration":"Negative","Frequency - Switching":"50kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Voltage - Input (Max)":"16.5V","Voltage - Input (Min)":"2.3V","Voltage - Output (Max)":"-5V","Supplier Device Package":"8-SOIC","Voltage - Output (Min/Fixed)":"-1.31V (-5V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.67","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.67000","currency":"USD"},{"qty":10,"price":"$6.92700","currency":"USD"},{"qty":25,"price":"$6.60480","currency":"USD"},{"qty":100,"price":"$5.73500","currency":"USD"},{"qty":250,"price":"$5.47724","currency":"USD"},{"qty":500,"price":"$4.99394","currency":"USD"},{"qty":1000,"price":"$4.34956","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/722c1b5dab6e276a6ebbcfdede371437.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How can I get current pricing and availability for the MAX635ACSA+?","answer":"Submit an RFQ through this listing — we source the MAX635ACSA+ through independent distribution and confirm current pricing and lead time at quote time against your BOM quantity. Availability is verified per lot before quoting."},{"question":"What package does the MAX635ACSA+ come in?","answer":"It ships in an 8-pin SOIC surface-mount package (0.154\" wide, 3.90 mm body width), supplied in tube packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX635ACSA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX635ACSA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}