{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TLS203B0EJV33XUMA1","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"TLS203B0EJV33XUMA1","canonicalUrl":"https://icboms.com/infineon/TLS203B0EJV33XUMA1","factsUrl":"https://icboms.com/api/mcp/products/TLS203B0EJV33XUMA1","rawCanonicalId":null},"summary":{"shortDescription":"Infineon OPTIREG™ TLS203B0EJV33XUMA1 fixed-output LDO, 3.3 V, 300 mA, PG-DSO-8-27 exposed pad, AEC-Q100 automotive qualified.","salesMarkdown":"## Fixed 3.3 V rail for automotive always-on domains The TLS203B0EJV33XUMA1 is a single-output LDO from Infineon's OPTIREG family, delivering a fixed 3.3 V at up to 300 mA. The 20 V maximum input covers a 12 V automotive battery with load-dump margin — the internal pass element survives the transient without an external clamp. Dropout is 0.4 V max at full load, so a 3.6 V pre-regulator rail keeps the output in regulation across the temperature range. The 60 µA quiescent current keeps the always-on domain draw low enough for battery-backed modules that must wake on a CAN or LIN message. ## PSRR and noise rejection for sensitive loads Power-supply rejection ratio is 65 dB at 120 Hz — this is the ripple frequency from a full-wave rectified 60 Hz mains, but it also tells you the regulator's ability to reject alternator whine and DC-DC switching ripple in the audio band. At 65 dB, a 100 mVpp ripple on the input is attenuated to roughly 56 µVpp at the output. The Enable pin lets the system microcontroller gate the output during sleep modes, dropping the total supply current to the 60 µA quiescent level plus the load on the VIN pin. Protection includes over-current, over-temperature, and reverse polarity — the reverse-polarity block prevents damage if the battery leads are swapped during service, a common field failure in automotive modules. ## PG-DSO-8-27 package and thermal management The 8-pin SOIC package with exposed pad (PG-DSO-8-27) routes the die's heat through the paddle to the PCB copper plane. For 300 mA output at 3.3 V from a 5 V input, the power dissipation is roughly 0.51 W — the exposed pad soldered to a 1 in² copper area on a 2-layer board keeps the junction temperature below 125 °C in a 85 °C ambient. The datasheet's thermal resistance figure (junction-to-ambient) assumes the recommended PCB footprint; the actual RthJA depends on the copper area and the number of thermal vias under the pad.","metaTitle":"Infineon TLS203B0EJV33XUMA1 LDO, 3.3V 300mA, AEC-Q100","metaDescription":"Infineon OPTIREG TLS203B0EJV33XUMA1 fixed 3.3V LDO, 300mA output, 65dB PSRR at 120Hz, AEC-Q100 automotive grade. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":"OPTIREG™","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"PSRR":"65dB (120Hz)","Grade":"Automotive","Series":"OPTIREG™","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Qualification":"AEC-Q100","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width) Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"300mA","Protection Features":"Over Current, Over Temperature, Reverse Polarity","Number of Regulators":"1","Output Configuration":"Positive","Operating Temperature":"-40°C ~ 125°C (TJ)","Voltage - Input (Max)":"20V","Voltage Dropout (Max)":"0.4 @ 300mA","Current - Supply (Max)":"12 mA","Supplier Device Package":"PG-DSO-8-27","Current - Quiescent (Iq)":"60 µA","Voltage - Output (Min/Fixed)":"3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.71","priceTiers":[{"qty":1,"price":"$1.71000","currency":"USD"},{"qty":10,"price":"$1.53200","currency":"USD"},{"qty":25,"price":"$1.44520","currency":"USD"},{"qty":100,"price":"$1.23140","currency":"USD"},{"qty":250,"price":"$1.15624","currency":"USD"},{"qty":500,"price":"$1.01172","currency":"USD"},{"qty":1000,"price":"$0.83828","currency":"USD"},{"qty":2500,"price":"$0.78047","currency":"USD"},{"qty":5000,"price":"$0.75156","currency":"USD"},{"qty":12500,"price":"$0.72266","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/01ce0972ade3068e172e798a3e710a9a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TLS203B0EJV33XUMA1/alternatives.json"},"ai":{"faq":[{"question":"What is the PSRR of TLS203B0EJV33XUMA1 and why does it matter?","answer":"The PSRR is 65 dB at 120 Hz. This means a 100 mVpp ripple at the input is attenuated to about 56 µVpp at the output — critical for keeping the 3.3 V rail clean when feeding analog sensors, CAN transceivers, or microcontroller ADCs in an automotive environment with alternator ripple and DC-DC converter noise."},{"question":"What automotive qualification does TLS203B0EJV33XUMA1 carry?","answer":"It is AEC-Q100 qualified, the automotive IC reliability standard covering temperature grade, ESD, latch-up, and extended life testing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/TLS203B0EJV33XUMA1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/TLS203B0EJV33XUMA1 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}}