{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM2931AZ50AP","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LM2931AZ50AP","canonicalUrl":"https://icboms.com/stmicroelectronics/LM2931AZ50AP","factsUrl":"https://icboms.com/api/mcp/products/LM2931AZ50AP","rawCanonicalId":null},"summary":{"shortDescription":"ON Semiconductor LM2931 series, 5V fixed output LDO regulator, 100mA, 0.6V dropout at 100mA, 75dB PSRR at 120Hz, -40°C to 125°C, TO-92-3 package, through-hole mounting.","salesMarkdown":"## 5V fixed LDO — where the dropout and PSRR matter The LM2931AZ50AP is a 5 V fixed-output low-dropout regulator from the LM2931 family, rated for 100 mA continuous output. Its 0.6 V maximum dropout at full load means the input rail can sag to 5.6 V before the output loses regulation — a tight headroom budget that suits battery-backed or lightly regulated supplies. Power supply rejection is 75 dB at 120 Hz, which filters the mains-frequency ripple from a rectified bulk supply or a switching pre-regulator. That PSRR figure, combined with the 1 mA quiescent current, makes this part a clean post-regulator choice for sensitive analog loads downstream of a noisy rail. ## Temperature range and application envelope The TO-92-3 through-hole package with formed leads is a straightforward hand-assembly or wave-solder fit for legacy boards and retrofit repairs. Protection features include current limit and thermal shutdown — the regulator survives a sustained output short or overload without secondary damage, which is a practical advantage in field-deployed equipment where a blown regulator means a service call. The LM2931AZ50AP carries an obsolete product status.","metaTitle":"LM2931AZ50AP 5V Fixed LDO Regulator, TO-92-3, Obsolete","metaDescription":"LM2931AZ50AP 5V fixed output LDO, 100mA, 0.6V dropout, 75dB PSRR at 120Hz, -40°C to 125°C, TO-92-3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"Mfr":"STMicroelectronics","PSRR":"75dB (120Hz)","Series":"-","Package":"Tape & Box (TB)","Output Type":"Fixed","Mounting Type":"Through Hole","Package / Case":"TO-226-3, TO-92-3 (TO-226AA) Formed Leads","Product Status":"Obsolete","lifecycle_stage":"eol_hot","Control Features":"-","Current - Output":"100mA","Base Product Number":"LM2931","Protection Features":"Current Limit, Thermal Shutdown","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"26V","Voltage Dropout (Max)":"0.6V @ 100mA","Current - Supply (Max)":"30 mA","Voltage - Output (Max)":"-","Supplier Device Package":"TO-92-3","Current - Quiescent (Iq)":"1 mA","Voltage - Output (Min/Fixed)":"5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d36d329ebe07b2117d1cff0e49ac76c9.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LM2931AZ50AP obsolete?","answer":"Yes, the LM2931AZ50AP carries an obsolete product status per ON Semiconductor. No official replacement has been designated."},{"question":"What is the replacement for LM2931AZ50AP?","answer":"No official replacement part has been published by ON Semiconductor. For new designs, consider a current-production 5 V fixed LDO in a similar package — the 0.6 V dropout and 75 dB PSRR at 120 Hz are the key parametric targets to match."},{"question":"Can I use LM2931AZ50AP in an automotive application?","answer":"Legacy designs that already qualified it remain valid; new automotive programs should verify the qualification status with the manufacturer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LM2931AZ50AP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LM2931AZ50AP when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T18:05:07.863Z","lastPublished":"2026-07-16T18:05:07.863Z","indexable":true}}