{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LD3985M28R","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LD3985M28R","canonicalUrl":"https://icboms.com/stmicroelectronics/LD3985M28R","factsUrl":"https://icboms.com/api/mcp/products/LD3985M28R","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LD3985M28R, fixed-output 2.8V LDO, 150mA, 0.1V dropout at full load, 60dB~50dB PSRR (1kHz~10kHz), SOT-23-5, -40°C to 125°C, active.","salesMarkdown":"## Fixed 2.8 V rail, 150 mA — what it delivers PSRR measures 60 dB at 1 kHz, dropping to 50 dB at 10 kHz — enough to clean up switching-regulator ripple in the audio band and low-frequency noise from a DC-DC converter. The operating temperature range of -40°C to 125°C qualifies it for automotive under-hood, industrial motor drives, and outdoor telecom equipment where the ambient can swing hard. ## Sourcing and lifecycle The LD3985M28R carries an Active lifecycle status with ROHS3 compliance. No last-time-buy or obsolescence notice is on record. Sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here.","metaTitle":"ST LD3985M28R 2.8V 150mA LDO, SOT-23-5","metaDescription":"STMicroelectronics LD3985M28R fixed 2.8V output LDO, 150mA, 0.1V dropout at full load, 60-50dB PSRR, -40 to 125°C. Active, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"60dB ~ 50dB (1kHz ~ 10kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"150mA","Protection Features":"Over Current, Over Temperature","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"6V","Voltage Dropout (Max)":"0.1V @ 150mA","Current - Supply (Max)":"250 µA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"150 µA","Voltage - Output (Min/Fixed)":"2.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.85","priceTiers":[{"qty":1,"price":"$0.85000","currency":"USD"},{"qty":10,"price":"$0.75700","currency":"USD"},{"qty":25,"price":"$0.71840","currency":"USD"},{"qty":100,"price":"$0.59030","currency":"USD"},{"qty":250,"price":"$0.55176","currency":"USD"},{"qty":500,"price":"$0.48762","currency":"USD"},{"qty":1000,"price":"$0.38496","currency":"USD"},{"qty":3000,"price":"$0.35930","currency":"USD"},{"qty":6000,"price":"$0.34133","currency":"USD"},{"qty":15000,"price":"$0.32850","currency":"USD"},{"qty":30000,"price":"$0.31824","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d364b32986ea139b3838b648f3f18bd0.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LD3985M28R/alternatives.json"},"ai":{"faq":[{"question":"Does LD3985M28R have an enable function?","answer":"Yes, the LD3985M28R includes an Enable control feature."},{"question":"Can LD3985M28R be used with 5V input?","answer":"Yes. The maximum input voltage is 6 V, so a 5 V rail is within the safe operating range."},{"question":"What is the pinout of LD3985M28R?","answer":"The LD3985M28R is in a standard SOT-23-5 package. Pin assignments follow the typical LDO with enable: consult the ST datasheet for the exact pin map."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LD3985M28R","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LD3985M28R 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}}