{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX1978ETM+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX1978ETMT","canonicalUrl":"https://icboms.com/analog-devices/MAX1978ETMT","factsUrl":"https://icboms.com/api/mcp/products/MAX1978ETM%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX1978ETM+T, Integrated TEC Controller, 3V to 5.5V Supply, 48-TQFN (7x7 mm) Exposed Pad, -40°C to 85°C, Active, ROHS3.","salesMarkdown":"## Integrated TEC controller for precision thermal management The Maxim Integrated MAX1978ETM+T is a single-chip controller and driver for Peltier thermoelectric cooler (TEC) modules, integrating the power stage, control loop, and temperature-monitoring interface in a 48-TQFN (7x7 mm) package with an exposed pad for heat sinking. It accepts a supply from 3V to 5.5V, covering common 3.3V and 5V rails found in optical transceivers, laser diode modules, and industrial temperature chambers. The operating temperature range of -40°C to 85°C suits outdoor telecom cabinets and factory-floor instrumentation where the ambient can swing well beyond commercial limits. ## Supply range and what it means for your power rail With a supply range of 3V to 5.5V, the MAX1978ETM+T can run directly off a 3.3V or 5V rail without a separate regulator. At the low end, 3V leaves about 0.3V headroom above the minimum for a 3.3V rail with typical tolerance, so a well-regulated supply is needed. The upper end at 5.5V gives margin for a 5V rail that might rise during light load. This flexibility simplifies BOM consolidation when the same TEC controller is used across multiple board variants with different system voltages. ## Package and thermal: the exposed pad is the heat path The 48-WFQFN exposed pad (7x7 mm) is the primary thermal path for the TEC drive current. The pad must be soldered to a copper plane on the PCB with thermal vias to inner ground layers. Without adequate via stitching, the junction temperature can exceed the 85°C operating limit even at moderate output currents. The 48-TQFN footprint is standard for this package family, so layout guides from Maxim's application notes for the MAX1978 family apply directly. ## Active lifecycle — no LTB risk for new designs The MAX1978ETM+T carries an Active product status with ROHS3 compliance. For a BOM line that requires a dedicated TEC controller, this part can be specified into new production without near-term obsolescence concern.","metaTitle":"MAX1978ETM+T TEC Controller, 3V-5.5V, 48-TQFN","metaDescription":"MAX1978ETM+T integrated TEC controller for Peltier modules. 3V to 5.5V supply, -40°C to 85°C, 48-TQFN exposed pad. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Applications":"Peltier Module, Thermoelectric Cooler","Mounting Type":"Surface Mount","Package / Case":"48-WFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"48-TQFN (7x7)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$31.38","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$31.38000","currency":"USD"},{"qty":10,"price":"$28.94500","currency":"USD"},{"qty":25,"price":"$27.64360","currency":"USD"},{"qty":100,"price":"$24.71670","currency":"USD"},{"qty":250,"price":"$23.57844","currency":"USD"},{"qty":2500,"price":"$20.48886","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7ff16cea33ee9d88e2e0100629b06cb3.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX1978ETMT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX1978ETMT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}