{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX640ESA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX640ESA","canonicalUrl":"https://icboms.com/analog-devices/MAX640ESA","factsUrl":"https://icboms.com/api/mcp/products/MAX640ESA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX640ESA+ step-down buck regulator, 225 mA output, adjustable (1.3V) or fixed 3.3V output, 4V to 11.5V input, 8-SOIC surface-mount package, tube.","salesMarkdown":"## 225 mA buck for point-of-load rails The MAX640ESA+ is a step-down (buck) switching regulator from Analog Devices, delivering up to 225 mA from a single positive output. It accepts an input rail between 4 V and 11.5 V, making it a fit for 5 V or 9 V intermediate buses common in industrial and telecom boards. ## Output voltage options and load fit The output can be set to an adjustable voltage down to 1.3 V, or configured for a fixed 3.3 V output — the fixed version simplifies the BOM by eliminating the external resistor divider. At 225 mA, this regulator suits light point-of-load rails for MCUs, sensors, or low-power logic that need a clean, regulated supply from a higher bus voltage. It does not include a synchronous rectifier, so the external Schottky diode carries the freewheeling current — budget the diode's forward drop and thermal dissipation in the layout, especially at higher input-to-output differentials. ## Package and board integration Supplied in tube packaging, it is suited for low-to-medium volume assembly or prototyping; for reel quantities, confirm the tube-to-reel conversion with the distributor at RFQ.","metaTitle":"MAX640ESA+ Buck Regulator, 225mA, 8-SOIC","metaDescription":"Analog Devices MAX640ESA+ step-down buck regulator, 225mA output, adjustable/fixed 3.3V, 4V-11.5V input, 8-SOIC. Active, RoHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","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":"225mA","Number of Outputs":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"No","Voltage - Input (Max)":"11.5V","Voltage - Input (Min)":"4V","Voltage - Output (Max)":"11.5V","Supplier Device Package":"8-SOIC","Voltage - Output (Min/Fixed)":"1.3V (3.3V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.57","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$9.57000","currency":"USD"},{"qty":10,"price":"$8.64300","currency":"USD"},{"qty":25,"price":"$8.24040","currency":"USD"},{"qty":100,"price":"$7.15520","currency":"USD"},{"qty":250,"price":"$6.83368","currency":"USD"},{"qty":500,"price":"$6.23068","currency":"USD"},{"qty":1000,"price":"$5.42673","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/567c182e6cb8d6b2f9c07a9bf0a80671.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX640ESA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX640ESA 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}}