{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCR4DG18,LF","brand":"Toshiba Semiconductor","brandSlug":"toshiba","productSlug":"TCR4DG18LF","canonicalUrl":"https://icboms.com/toshiba/TCR4DG18LF","factsUrl":"https://icboms.com/api/mcp/products/TCR4DG18%2CLF","rawCanonicalId":null},"summary":{"shortDescription":"Toshiba Semiconductor TCR4DG series LDO, TCR4DG18,LF, fixed 1.8V output, 420mA, 70dB PSRR (1kHz), 4-WCSPE package, active.","salesMarkdown":"The TCR4DG18,LF is a 420 mA fixed-output LDO from Toshiba's TCR4DG series, delivering 1.8 V from a maximum 5.5 V input. Its 70 dB PSRR at 1 kHz means it attenuates switching-regulator ripple and digital noise on the input by a factor of ~3000 — critical when the 1.8 V rail feeds an ADC reference, PLL supply, or RF front-end where a few millivolts of feedthrough corrupt the signal. That 200 mV headroom budget is the design margin; a 2.5 V rail with ±5% tolerance dips to 2.375 V, leaving 102 mV of margin above the dropout ceiling. ## 420 mA continuous — the load ceiling and thermal envelope Rated for 420 mA continuous output, the TCR4DG18,LF covers low-power SoC cores, sensor bias, and auxiliary logic rails. The 4-WCSPE package (0.65 x 0.65 mm) has a thermal resistance that depends on the PCB copper area — at 420 mA with 1.8 V output from a 3.3 V input, the power dissipation is 0.63 W, which the package can handle with adequate board-level heat spreading. Protection features include over-current, over-temperature, and short-circuit shutdown — the regulator survives a sustained output short without damage, and the thermal foldback prevents die temperature from exceeding the silicon limit during fault conditions. ## Active lifecycle — no EOL risk for production BOMs The Enable control feature lets the system designer gate the 1.8 V rail with a logic signal — useful for sequencing core and I/O supplies or shutting down the regulator in sleep modes to save quiescent current. ## 4-WCSPE footprint — board integration and rework Housed in a 4-bump WCSPE (0.65 x 0.65 mm), the TCR4DG18,LF requires a PCB land pattern matching the Toshiba-recommended stencil aperture. The small pitch means solder paste volume and reflow profile matter — a 0.1 mm stencil thickness with a nitrogen atmosphere reduces voiding under the bumps. Rework requires a hot-air nozzle sized for the 0.65 mm body; the adjacent components must clear the nozzle footprint. Surface-mount assembly with standard lead-free reflow (260 °C peak) is compatible. The package is moisture-sensitive — bake before reflow if the floor life has been exceeded per the label MSL level.","metaTitle":"Toshiba TCR4DG18,LF LDO 1.8V 420mA 70dB PSRR","metaDescription":"Toshiba TCR4DG18,LF linear regulator, 1.8V fixed output, 420mA, 70dB PSRR at 1kHz. Active production, RoHS3 compliant. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"TCR4DG","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"PSRR":"70dB (1kHz)","Series":"TCR4DG","Package":"Tape & Reel (TR); Cut Tape (CT)","Output Type":"Fixed","Mounting Type":"Surface Mount","Package / Case":"4-XFBGA, CSPBGA","lifecycle_stage":"eol_hot","Control Features":"Enable","Current - Output":"420mA","Protection Features":"Over Current, 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)":"0.473V @ 420mA","Supplier Device Package":"4-WCSPE (0.65x0.65)","Voltage - Output (Min/Fixed)":"1.8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5","stockQuantity":21,"priceTiers":[{"qty":1,"price":"$0.50000","currency":"USD"},{"qty":10,"price":"$0.40300","currency":"USD"},{"qty":25,"price":"$0.36920","currency":"USD"},{"qty":100,"price":"$0.27470","currency":"USD"},{"qty":250,"price":"$0.24896","currency":"USD"},{"qty":500,"price":"$0.20604","currency":"USD"},{"qty":1000,"price":"$0.15453","currency":"USD"},{"qty":2500,"price":"$0.14165","currency":"USD"},{"qty":5000,"price":"$0.13307","currency":"USD"},{"qty":10000,"price":"$0.12448","currency":"USD"},{"qty":25000,"price":"$0.11418","currency":"USD"},{"qty":50000,"price":"$0.10989","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the PSRR of TCR4DG18,LF and why does it matter?","answer":"This matters when the 1.8 V output powers noise-sensitive circuits like ADC references or PLLs — a 10 mV ripple on the input becomes roughly 3 µV at the output, preserving signal integrity."},{"question":"Will TCR4DG18,LF drop into a board designed for TCR4DG125,LF?","answer":"The TCR4DG18,LF and TCR4DG125,LF share the same package (4-WCSPE), pinout, and 420 mA current rating. The only difference is the output voltage — 1.8 V vs 1.25 V. If the board's downstream loads are rated for 1.8 V, the part is a drop-in replacement without rewiring."},{"question":"What compliance documentation does Toshiba provide for TCR4DG18,LF?","answer":"Toshiba provides RoHS3 compliance certification for the TCR4DG18,LF. The part is surface-mount and lead-free compatible. No UL or IEC certification is listed in the available documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/toshiba/TCR4DG18LF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/toshiba/TCR4DG18LF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}