{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LDLN025PU25R","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"LDLN025PU25R","canonicalUrl":"https://icboms.com/stmicroelectronics/LDLN025PU25R","factsUrl":"https://icboms.com/api/mcp/products/LDLN025PU25R","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics LDLN025PU25R linear regulator, 2.5V fixed output, 250mA, 80dB PSRR at 100Hz, 4-XDFN exposed pad package, active production.","salesMarkdown":"## PSRR — the spec that decides fit for sensitive rails Rated 80 dB PSRR at 100 Hz, rolling off to 60 dB at 100 kHz. That 80 dB figure at line-frequency ripple means the regulator attenuates 100/120 Hz rectifier hum by a factor of 10,000 — relevant when this LDO follows a switching preregulator or powers an analog front-end where power-supply rejection at the ADC reference matters. The 60 dB floor at 100 kHz still knocks down switching-regulator ripple by 1,000:1. Compare this to the STLQ020C33R peer, which lists 52 dB to 45 dB over 100 Hz to 10 kHz — the LDLN025PU25R holds roughly 28 dB more rejection at line frequency and maintains useful attenuation an order of magnitude higher in frequency. ## Dropout, quiescent current, and the 2.5 V rail Maximum dropout is 0.25 V at the full 250 mA output. The 25 µA quiescent current (Iq) makes this a candidate for always-on rails in battery-powered designs where the regulator's own draw matters more than the load's sleep current. Output is fixed at 2.5 V, positive configuration, single regulator. ## Protection set and temperature grade Over-current, over-temperature, short-circuit, and soft-start protection are all integrated — no external watchdog or current-limit resistor needed. ## Package reality — 1x1 mm DFN The 4-XDFN exposed pad package measures 1x1 mm (supplier device package 4-DFN). Surface-mount only; no through-hole variant exists.","metaTitle":"STMicroelectronics LDLN025PU25R LDO, 2.5V 250mA, 80dB PSRR","metaDescription":"STMicroelectronics LDLN025PU25R linear regulator: 2.5V fixed output, 250mA, 80dB PSRR at 100Hz. Active production, ROHS3. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"80dB ~ 60dB (100Hz ~ 100KHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"4-XDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"250mA","Protection Features":"Over Current, Over Temperature, Short Circuit, Soft Start","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"0.25V @ 250mA","Current - Supply (Max)":"425 µA","Supplier Device Package":"4-DFN (1x1)","Current - Quiescent (Iq)":"25 µA","Voltage - Output (Min/Fixed)":"2.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.62","priceTiers":[{"qty":1,"price":"$0.62000","currency":"USD"},{"qty":10,"price":"$0.52900","currency":"USD"},{"qty":25,"price":"$0.49400","currency":"USD"},{"qty":100,"price":"$0.39500","currency":"USD"},{"qty":250,"price":"$0.36684","currency":"USD"},{"qty":500,"price":"$0.31038","currency":"USD"},{"qty":1000,"price":"$0.23985","currency":"USD"},{"qty":2500,"price":"$0.23292","currency":"USD"},{"qty":5000,"price":"$0.23292","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/5a568c262f65df9e5f22add622431e0a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LDLN025PU25R/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of LDLN025PU25R?","answer":"Rated 80 dB at 100 Hz, dropping to 60 dB at 100 kHz."},{"question":"Will LDLN025PU25R drop in as a replacement for STLQ020C33R?","answer":"No — the STLQ020C33R outputs 3.3 V fixed, while the LDLN025PU25R outputs 2.5 V fixed. The package and pinout differ as well (4-XDFN vs the STLQ020's package). These are not pin-compatible or drop-in replacements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/LDLN025PU25R","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/LDLN025PU25R 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}}