{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP5900SDX-1.8/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP5900SDX-1.8-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP5900SDX-1.8-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP5900SDX-1.8%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP5900 LDO, 150 mA, fixed 1.8 V output, 6-WDFN exposed pad, surface mount, -40 to 85 °C, active.","salesMarkdown":"## 150 mA LDO for a clean 1.8 V rail The LP5900SDX-1.8/NOPB is a single-output, fixed 1.8 V LDO delivering 150 mA from a 5.5 V max input rail. Quiescent current is 50 µA typical, with a maximum supply draw of 230 µA. For a battery-powered sensor that spends most of its time in a low-power state with the regulator enabled, that Iq is the floor the system sees between active bursts. ## PSRR profile and noise-sensitive loads Power-supply rejection ratio starts at 85 dB at 100 Hz and rolls off to 40 dB at 100 kHz. That means low-frequency ripple from a mains-derived DC rail is attenuated by a factor of ~18,000, while switching-regulator noise at a few hundred kHz passes through with only 100× rejection. If the downstream load is an analog front-end or a PLL that runs off the 1.8 V rail, the upstream switcher's ripple needs to be below the LDO's attenuation floor at the switching frequency. The 6-WSON package with exposed pad (2.2 × 2.5 mm) keeps the thermal resistance low enough for 150 mA at 85 °C ambient, provided the PCB pad has a solid via array to an internal ground plane. The enable pin lets a system controller gate the rail entirely, cutting the supply current to near zero when the 1.8 V domain is idle. ## Active lifecycle and sourcing Supplied in tape-and-reel or cut-tape options. The 6-WSON footprint is shared across the LP5900 family, so a board layout for this order code accepts other fixed-voltage variants of the same regulator without a PCB spin.","metaTitle":"TI LP5900SDX-1.8/NOPB LDO, 150mA, 1.8V Fixed, 6-WSON","metaDescription":"Texas Instruments LP5900SDX-1.8/NOPB LDO regulator, 150mA output, fixed 1.8V, 85dB PSRR, 6-WSON package. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"85dB ~ 40dB (100Hz ~ 100kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"6-WDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"150mA","Protection Features":"Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 85°C","Voltage - Input (Max)":"5.5V","Voltage Dropout (Max)":"0.15V @ 150mA","Current - Supply (Max)":"230 µA","Supplier Device Package":"6-WSON (2.2x2.5)","Current - Quiescent (Iq)":"50 µA","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.96","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.96000","currency":"USD"},{"qty":10,"price":"$0.84700","currency":"USD"},{"qty":25,"price":"$0.79520","currency":"USD"},{"qty":100,"price":"$0.64900","currency":"USD"},{"qty":250,"price":"$0.60284","currency":"USD"},{"qty":500,"price":"$0.51304","currency":"USD"},{"qty":1000,"price":"$0.41043","currency":"USD"},{"qty":4500,"price":"$0.37195","currency":"USD"},{"qty":9000,"price":"$0.36300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b1cdbce4fcf886ae82559da8fd801b95.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is LP5900SDX-1.8/NOPB's PSRR at different frequencies?","answer":"The PSRR is 85 dB at 100 Hz, rolling off to 40 dB at 100 kHz. This means the regulator strongly attenuates 100/120 Hz ripple from rectified mains, but provides less rejection at higher switching frequencies typical of DC-DC converters."},{"question":"What package does LP5900SDX-1.8/NOPB use?","answer":"It comes in a 6-WDFN exposed pad package (6-WSON, 2.2 × 2.5 mm body)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP5900SDX-1.8-NOPB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LP5900SDX-1.8-NOPB 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}}