{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ST730MR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ST730MR","canonicalUrl":"https://icboms.com/stmicroelectronics/ST730MR","factsUrl":"https://icboms.com/api/mcp/products/ST730MR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ST730MR, adjustable positive LDO regulator, 300 mA output, 1.2 V to 26.8 V output range, 28 V max input, 10 µA quiescent current, 75 dB PSRR at 1 kHz, SOT-23-5 package, -40 °C to 125 °C junction temperature.","salesMarkdown":"## What the 28 V input and 10 µA Iq mean for your rail The ST730MR is an adjustable positive LDO from STMicroelectronics that delivers up to 300 mA with a 28 V maximum input and an adjustable output from 1.2 V up to 26.8 V. The headline number here is the 10 µA quiescent current — that's the current the regulator burns just to stay alive, and at this level it's sized for always-on rails in automotive body controllers, industrial sensors, and battery-backed systems where every microamp matters. The PSRR starts at 75 dB at 1 kHz and rolls off to 35 dB at 100 Hz, which is typical for a low-Iq LDO — you'll want a small ceramic cap on the output to keep the 100 Hz ripple from passing through. ## Dropout and protection — real-world margin Maximum dropout is 1.2 V at the full 300 mA load, so a 3.3 V output needs at least 4.5 V input to regulate cleanly. That's a 1.2 V headroom budget — fine for a 5 V rail but tight off a 3.6 V battery cell. On-chip protection includes current limit and thermal shutdown, so a shorted output won't blow the part, but it will cycle in and out of thermal limit if the fault persists. ## Package and temperature — industrial and automotive capable The ST730MR comes in the SOT-23-5 package (also listed as SC-74A / SOT-753), a common five-pin footprint with a single ground pin and no exposed pad. Surface-mount only, and with no thermal pad, the 300 mA output at high ambient will be limited by the PCB copper area — expect to derate above 85 °C ambient unless you have a good ground-plane pour. ## Sourcing and lifecycle — still a current-production part It's ROHS3 compliant.","metaTitle":"STMicroelectronics ST730MR LDO Regulator, Adjustable Output","metaDescription":"ST730MR adjustable LDO: 1.2V to 26.8V output, 300mA, 10 µA Iq, 75dB PSRR at 1kHz. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"75db ~ 35db (1kHz ~ 100Hz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Adjustable","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"300mA","Protection Features":"Current Limit, Thermal Shutdown","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"28V","Voltage Dropout (Max)":"1.2V @ 300mA","Current - Supply (Max)":"240 µA","Voltage - Output (Max)":"26.8V","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"10 µA","Voltage - Output (Min/Fixed)":"1.2V"}},"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/4465ec0d696ae106e4f9b7a761cc7d5a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ST730MR/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ST730MR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ST730MR 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}}