{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PM8805TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"PM8805TR","canonicalUrl":"https://icboms.com/stmicroelectronics/PM8805TR","factsUrl":"https://icboms.com/api/mcp/products/PM8805TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics PM8805TR, PoE PD Controller with integrated DC/DC, 2-channel, 99.9 W, 802.3bt/at/af, 9-57 V, 43-VFQFN exposed pad, Tape & Reel.","salesMarkdown":"## Dual-channel PoE PD with integrated DC/DC The PM8805TR from STMicroelectronics is a dual-channel Power-over-Ethernet Powered Device controller with an integrated DC/DC converter, supporting the 802.3bt standard up to 99.9 W while remaining backward-compatible with 802.3at (PoE+) and 802.3af (PoE). The input voltage range of 9 V to 57 V covers the full PoE bus, from legacy 48 V systems to the higher-voltage 802.3bt PSE outputs, and the internal switches eliminate the need for an external hot-swap FET in most designs. ## 43-VFQFN exposed-pad — thermal and layout demands Housed in a 43-VFQFN with an exposed pad (8x8 mm body, 0.50 mm pitch), the PM8805TR requires a thermal via array under the pad to sink heat from the integrated DC/DC switches — the pad is the primary thermal path, not the leads. Surface-mount assembly on a standard FR-4 board is straightforward, but the exposed pad footprint demands a solder-paste stencil aperture that covers 50-70% of the pad area to avoid voiding and ensure the thermal resistance stays within the datasheet RthJA. ## Active production, ROHS3 — no LTB pressure The 15 µA quiescent supply current means the controller itself draws negligible power in standby — relevant for always-on PD applications where every milliwatt counts against the PoE class budget. ## Industrial temperature, not automotive Rated for -40°C to 85°C ambient, the PM8805TR suits industrial PoE endpoints (IP cameras, wireless APs, IoT gateways) but lacks AEC-Q100 qualification — not intended for under-hood or chassis-mounted automotive PD designs. Two independent channels allow the controller to negotiate power on both Ethernet pairs simultaneously, drawing up to 99.9 W total — enough for pan-tilt-zoom cameras or multi-radio access points that exceed the 25.5 W limit of 802.3at single-channel.","metaTitle":"STMicroelectronics PM8805TR PoE PD Controller, 99.9 W, 2-Ch","metaDescription":"STMicroelectronics PM8805TR dual-channel PoE PD controller, 99.9 W max, 802.3bt/at/af, 9-57 V input, 43-VFQFN. Active, ROHS3. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Controller (PD), DC/DC","Package":"Tape & Reel (TR); Cut Tape (CT)","Standards":"802.3at (PoE+), 802.3af (PoE), 802.3bt","Power - Max":"99.9 W","Mounting Type":"Surface Mount","Package / Case":"43-VFQFN Exposed Pad","Auxiliary Sense":"Yes","lifecycle_stage":"eol_hot","Current - Supply":"15µA","Voltage - Supply":"9V ~ 57V","Internal Switch(s)":"Yes","Number of Channels":"2","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"43-VFQFPN (8x8)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.43","priceTiers":[{"qty":1,"price":"$10.43000","currency":"USD"},{"qty":10,"price":"$9.42300","currency":"USD"},{"qty":25,"price":"$8.98480","currency":"USD"},{"qty":100,"price":"$7.80140","currency":"USD"},{"qty":250,"price":"$7.45076","currency":"USD"},{"qty":500,"price":"$6.79334","currency":"USD"},{"qty":1000,"price":"$5.91677","currency":"USD"},{"qty":2500,"price":"$5.69763","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2596914a13e265370dd2bd621318e8e1.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PM8805TR/alternatives.json"},"ai":{"faq":[{"question":"What PoE standards does the PM8805TR support?","answer":"The PM8805TR supports 802.3bt (up to 99.9 W), 802.3at (PoE+, 25.5 W), and 802.3af (PoE, 15.4 W). It is backward-compatible with all three, so it can be designed into a system that must work with legacy PoE switches as well as the latest high-power PSEs."},{"question":"What package does the PM8805TR come in?","answer":"The PM8805TR is supplied in a 43-VFQFN exposed-pad package measuring 8x8 mm (supplier device package 43-VFQFPN). It is surface-mount and shipped on Tape & Reel (TR) or Cut Tape (CT)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/PM8805TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/PM8805TR 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}}