{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LP3985IM5X-4.7/NOPB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LP3985IM5X-4.7-NOPB","canonicalUrl":"https://icboms.com/texas-instruments/LP3985IM5X-4.7-NOPB","factsUrl":"https://icboms.com/api/mcp/products/LP3985IM5X-4.7%2FNOPB","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LP3985IM5X-4.7/NOPB LDO, fixed 4.7V output, 150mA, 0.1V dropout, 50-40dB PSRR, SOT-23-5, -40 to 125°C.","salesMarkdown":"## 4.7V fixed LDO — 150 mA, 0.1 V dropout The LP3985IM5X-4.7/NOPB is a fixed-output linear regulator from Texas Instruments delivering 4.7 V at up to 150 mA. The 0.1 V maximum dropout at full load means the input rail needs to stay above 4.8 V to maintain regulation — a 5 V rail with 200 mV of ripple still has headroom. ## PSRR profile and noise rejection PSRR is specified at 50 dB at 1 kHz, dropping to 40 dB at 10 kHz. This means the regulator attenuates 1 kHz ripple by a factor of ~316, but at 10 kHz the attenuation drops to ~100. For an analog front-end sensitive to switching-regulator noise above a few kilohertz, additional post-filtering may be needed. Quiescent current is 150 µA typical, with a maximum supply current of 250 µA. The 150 µA Iq is low enough for always-on rails in battery-powered designs — a sensor node drawing 10 µA in sleep mode sees the regulator's own draw dominate the sleep budget. ## Protection and temperature range Built-in over-current, over-temperature, and short-circuit protection reduce the need for external supervisory components. The enable pin (active high) allows the regulator to be shut down externally, pulling the output to high-impedance and reducing the load on the input rail. The 5-pin footprint with 0.95 mm pitch fits a two-layer board — the thermal pad is the tab on pin 5 (output), and the copper area under it sets the junction-to-ambient thermal resistance.","metaTitle":"LP3985IM5X-4.7/NOPB LDO, 4.7V Fixed, 150mA, SOT-23-5","metaDescription":"Texas Instruments LP3985IM5X-4.7/NOPB LDO, 4.7V fixed output, 150mA, 0.1V dropout, 50-40dB PSRR, -40 to 125°C, SOT-23-5. Active, ROHS3. Order online.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Power Management (PMIC / Gate Driver)"],"specifications":{"PSRR":"50dB ~ 40dB (1kHz ~ 10kHz)","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"SC-74A, SOT-753","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"150mA","Protection Features":"Over Current, Over Temperature, Short Circuit","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C","Voltage - Input (Max)":"6V","Voltage Dropout (Max)":"0.1V @ 150mA","Current - Supply (Max)":"250 µA","Supplier Device Package":"SOT-23-5","Current - Quiescent (Iq)":"150 µA","Voltage - Output (Min/Fixed)":"4.7V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.82","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.82000","currency":"USD"},{"qty":10,"price":"$0.72100","currency":"USD"},{"qty":25,"price":"$0.67680","currency":"USD"},{"qty":100,"price":"$0.55250","currency":"USD"},{"qty":250,"price":"$0.51316","currency":"USD"},{"qty":500,"price":"$0.43672","currency":"USD"},{"qty":1000,"price":"$0.34938","currency":"USD"},{"qty":3000,"price":"$0.21688","currency":"USD"},{"qty":6000,"price":"$0.20288","currency":"USD"},{"qty":15000,"price":"$0.19800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/2b0c4f544b067861411cda399254c5b0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of LP3985IM5X-4.7/NOPB at 1 kHz and 10 kHz?","answer":"PSRR is 50 dB at 1 kHz and 40 dB at 10 kHz. This is the typical ripple rejection from the input to the output — a 100 mVpp ripple at 1 kHz is attenuated to about 0.3 mVpp at the output."},{"question":"What package does LP3985IM5X-4.7/NOPB come in?","answer":"The package is SC-74A / SOT-753, with the supplier device package listed as SOT-23-5."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LP3985IM5X-4.7-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/LP3985IM5X-4.7-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}}