{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC3803ES6-3#TRMPBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC3803ES6-3~4TRMPBF","canonicalUrl":"https://icboms.com/analog-devices/LTC3803ES6-3~4TRMPBF","factsUrl":"https://icboms.com/api/mcp/products/LTC3803ES6-3%23TRMPBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC3803ES6-3#TRMPBF flyback switching controller, 300kHz fixed frequency, 5.7V to 8V supply, TSOT-23-6 package, Tape & Reel.","salesMarkdown":"## Flyback controller with 300 kHz fixed switching The LTC3803ES6-3#TRMPBF: The LTC3803 is a current-mode flyback PWM controller that drives an external MOSFET. Its 300 kHz fixed switching frequency is a practical midpoint — high enough to keep the transformer small, low enough that switching losses in the FET and core don't dominate the thermal budget. The output configuration is positive and isolation-capable, meaning the controller can regulate a secondary-side output across a transformer with an optocoupler feedback path. Maximum duty cycle is 80%, which sets a floor on the achievable step-down ratio in continuous-conduction mode — a design consideration when the input-to-output voltage difference is large. The Vcc supply range is 5.7 V to 8 V — a narrow window that typically requires a regulated bias rail rather than a loosely-tapped line. An auxiliary winding on the flyback transformer is the usual source once the converter is running. The single-output transistor-driver stage drives an external N-channel MOSFET; there is no synchronous rectifier on chip, so the secondary-side rectifier is a Schottky diode in the standard flyback arrangement. ## TSOT-23-6 — footprint and board fit Housed in a 6-lead TSOT-23-6 (thin SOT-23) package, the part occupies roughly 9 mm² of board area — suitable for space-constrained isolated supplies in IGBT gate-drive bias, auxiliary housekeeping rails, or telecom line cards. The control features are limited to current limit and enable — no soft-start ramp, no frequency synchronization, no external compensation ramp. The enable pin provides a simple on/off shutdown that pulls the supply current to near zero.","metaTitle":"LTC3803ES6-3#TRMPBF Flyback Controller, 300kHz, TSOT-23-6","metaDescription":"Active-production flyback PWM controller from Analog Devices. 300kHz fixed frequency, 5.7-8V supply, -40 to 125°C. TSOT-23-6 package. ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Function":"Step-Up/Step-Down","Topology":"Flyback","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"SOT-23-6 Thin, TSOT-23-6","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable","Duty Cycle (Max)":"80%","Number of Outputs":"1","Output Configuration":"Positive, Isolation Capable","Frequency - Switching":"300kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"TSOT-23-6","Voltage - Supply (Vcc/Vdd)":"5.7V ~ 8V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.88","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.88000","currency":"USD"},{"qty":10,"price":"$3.48100","currency":"USD"},{"qty":25,"price":"$3.29120","currency":"USD"},{"qty":100,"price":"$2.85250","currency":"USD"},{"qty":250,"price":"$2.70616","currency":"USD"},{"qty":500,"price":"$2.42824","currency":"USD"},{"qty":1000,"price":"$2.07000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC3803ES6-3~4TRMPBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC3803ES6-3~4TRMPBF 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}}