{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ST732M28R","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ST732M28R","canonicalUrl":"https://icboms.com/stmicroelectronics/ST732M28R","factsUrl":"https://icboms.com/api/mcp/products/ST732M28R","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ST732M28R low-dropout voltage regulator, 2.8V fixed output, 300mA output current, 28V max input, 10 µA quiescent current, SOT-23-5 package, -40°C to 125°C operating temperature.","salesMarkdown":"The STMicroelectronics ST732M28R is a fixed-output low-dropout voltage regulator delivering 2.8V at up to 300mA from an input rail that can go as high as 28V. That input range is the headline differentiator — most LDOs in a SOT-23-5 package top out around 5.5V or 16V, so this part suits designs where the raw supply is a 24V industrial bus, an automotive battery line, or a multi-cell Li-ion stack that needs a clean 2.8V rail for a sensor or MCU. ## Dropout and headroom — the 1.2V max at full load Maximum dropout is specified at 1.2V when delivering 300mA. That means the input needs to stay above 4.0V (2.8V + 1.2V) to maintain regulation at full current. If your rail is a 3.3V bus with margin, this part isn't the fit — look for a lower-dropout device. But if you're dropping from a 5V, 12V, or 24V rail, the headroom is generous and the dropout spec won't be the constraint. The 200 µA maximum supply current is worth noting for standby-power budgeting. ## Protection and package — no external watchdog needed Over-current and over-temperature protection are integrated, so a short on the output or a thermal runaway condition shuts the regulator down without an external supervisor. The SOT-23-5 (SC-74A) footprint is standard and rework-friendly — no exposed pad to solder, just five pins. For the storeroom, store the reels dry — SOT-23-5 is MSL 1 by default, but always check the bag label.","metaTitle":"STMicroelectronics ST732M28R LDO Regulator, 2.8V Fixed","metaDescription":"STMicroelectronics ST732M28R low-dropout voltage regulator: 2.8V fixed output, 300mA, 28V max input, 10 µA quiescent current, -40°C to 125°C. SOT-23-5. Active.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Current - Output":"300mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TA)","Voltage - Input (Max)":"28V","Voltage Dropout (Max)":"1.2V @ 300mA","Current - Supply (Max)":"200 µA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"10 µA","Voltage - Output (Min/Fixed)":"2.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.04","priceTiers":[{"qty":1,"price":"$1.04000","currency":"USD"},{"qty":10,"price":"$0.92700","currency":"USD"},{"qty":25,"price":"$0.88000","currency":"USD"},{"qty":100,"price":"$0.72290","currency":"USD"},{"qty":250,"price":"$0.67576","currency":"USD"},{"qty":500,"price":"$0.59720","currency":"USD"},{"qty":1000,"price":"$0.47147","currency":"USD"},{"qty":3000,"price":"$0.44004","currency":"USD"},{"qty":6000,"price":"$0.41804","currency":"USD"},{"qty":15000,"price":"$0.40232","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1b4904ba50f81f4032b413d78932e189.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ST732M28R/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ST732M28R","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ST732M28R 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}}