{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MIC5317-3.3YMT-TR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"MIC5317-3.3YMT-TR","canonicalUrl":"https://icboms.com/microchip/MIC5317-3.3YMT-TR","factsUrl":"https://icboms.com/api/mcp/products/MIC5317-3.3YMT-TR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip MIC5317-3.3YMT-TR, 150mA LDO, fixed 3.3V output, PSRR 80dB~65dB (1kHz~10kHz), dropout 0.31V max, quiescent 39µA, -40°C~125°C, 4-UDFN exposed pad, active.","salesMarkdown":"## 80 dB PSRR at 1 kHz — the analog-rail LDO The Microchip MIC5317-3.3YMT-TR is a single-output, fixed 3.3 V positive LDO rated for 150 mA continuous output. Its headline feature is the PSRR curve: 80 dB at 1 kHz, rolling off to 65 dB at 10 kHz, which puts it in the low-noise regulator class suitable for powering analog front-ends, ADC reference buffers, or RF VCO supplies where the upstream switching regulator needs suppression. Dropout is specified at 0.31 V maximum at the full 150 mA load, so the input rail needs at least 3.61 V to hold regulation. Quiescent current sits at 39 µA typical — not the lowest for battery-idle, but reasonable for a part that prioritises PSRR over micropower. ## Thermal and package — 1×1 mm UDFN with exposed pad The package is a 4-lead UDFN measuring 1×1 mm with an exposed pad. That pad is the primary thermal path: without a via stitch under the pad, the junction temperature climbs quickly above 100 mA continuous at 125°C ambient. The exposed pad also serves as the ground return — the PCB layout must connect it directly to the ground plane with multiple vias to keep inductance low. ## Protection and control An Enable pin lets the system shut down the LDO for power sequencing or sleep modes. On-chip protection includes over-current and over-temperature shutdown. No reverse-current protection is listed, so if the output can rise above the input (e.g., a backup battery), an external Schottky or series diode is needed.","metaTitle":"MIC5317-3.3YMT-TR 150mA LDO, 3.3V Fixed, PSRR 80dB, 4-UDFN","metaDescription":"MIC5317-3.3YMT-TR from Microchip: 150mA LDO, fixed 3.3V output, PSRR 80dB~65dB (1kHz~10kHz), dropout 0.31V max at 150mA, -40°C to 125°C, 4-UDFN exposed pad.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Signal Isolation"],"specifications":{"PSRR":"80dB ~ 65dB (1kHz ~ 10kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"4-UDFN Exposed Pad","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 (TJ)","Voltage - Input (Max)":"6V","Voltage Dropout (Max)":"0.31V @ 150mA","Supplier Device Package":"4-UDFN (1x1)","Current - Quiescent (Iq)":"39 µA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.23","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.23000","currency":"USD"},{"qty":25,"price":"$0.19000","currency":"USD"},{"qty":100,"price":"$0.18000","currency":"USD"},{"qty":5000,"price":"$0.18000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/cd2698f09ba7ca8b97270ec12968bdb5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is MIC5317-3.3YMT-TR active or obsolete?","answer":"No last-time-buy is scheduled, so the part is safe for new designs."},{"question":"What is a direct equivalent or replacement for MIC5317-3.3YMT-TR?","answer":"The closest functional peer is the MIC5353YMT-TR, also a 150 mA LDO in a similar UDFN package, but its PSRR is 60 dB at 1 kHz — 20 dB lower than the MIC5317. The MIC5353 also has an adjustable output option, whereas the MIC5317-3.3YMT-TR is fixed at 3.3 V. For a fixed 3.3 V rail where PSRR matters, the MIC5317 is the better choice."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/MIC5317-3.3YMT-TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/MIC5317-3.3YMT-TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}