{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM5033SD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM5033SD","canonicalUrl":"https://icboms.com/texas-instruments/LM5033SD","factsUrl":"https://icboms.com/api/mcp/products/LM5033SD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM5033SD PWM controller, voltage-mode, step-up/step-down, full-bridge/half-bridge/push-pull topology, 200kHz/600kHz switching, 15V-90V supply, 10-WDFN exposed pad package, RoHS non-compliant.","salesMarkdown":"## Active production — what it means for your BOM One catch worth flagging: the LM5033SD is RoHS non-compliant. If your assembly line or customer spec requires RoHS-10 exemption-free compliance, this part will not pass. It is suitable for legacy builds, military/industrial contracts with RoHS exemptions, or any BOM that explicitly allows lead-bearing solder. ## Supply voltage and switching frequency — the fit check The LM5033SD runs on a 15V to 90V supply rail. That wide input range covers 24V, 48V, and 72V industrial buses without an external pre-regulator — the internal start-up regulator handles the drop. The 90V ceiling means it survives a 48V bus transient up to that level before the part sees overvoltage. Switching frequency is set by an external resistor to either 200kHz or 600kHz. At 600kHz the magnetics shrink — a 48V-to-12V push-pull converter can use a smaller transformer core — but the gate-drive losses climb. At 200kHz the efficiency is higher at the cost of larger magnetics. The part also supports clock sync to lock the switching edge to an external clock, useful when multiple converters share a bus and you need to spread or align the noise spectrum. ## Topology and output stage The LM5033SD supports full-bridge, half-bridge, and push-pull topologies. That makes it a one-part-fit for isolated DC-DC converters in telecom rectifiers, server PSUs, or industrial auxiliary supplies — the same controller works for a 100W half-bridge or a 500W full-bridge by swapping the external FETs and transformer. The output is a PWM signal driving external FETs; the part itself does not integrate the power switches. Two outputs with positive configuration drive the high-side and low-side FETs in a bridge. Synchronous rectification is supported — the controller can drive the SR FETs on the secondary side, which recovers the diode conduction loss and pushes efficiency above 90% in a typical 48V-to-12V converter. ## Package and board-fit for the rework bench The LM5033SD comes in a 10-WDFN exposed pad package, also listed as 10-WSON (4x4). For rework: the WSON package is hand-reworkable with hot air. The exposed pad wicks heat away from the pins, so preheat the board to 100-120°C before lifting the part. Pin 1 is marked by a chamfer on the top-left corner of the package — the orientation is unambiguous. Use a fine-tip iron for the perimeter pads after the hot-air reflow; the pad pitch is 0.5mm, so a 0.3mm tip and no-clean flux keep the bridges off.","metaTitle":"LM5033SD PWM Controller, 200-600kHz, 15-90V, Active","metaDescription":"LM5033SD active PWM controller, 15V-90V supply, 200kHz/600kHz switching, full-bridge/half-bridge/push-pull. RoHS non-compliant. Order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Bulk","Function":"Step-Up/Step-Down","Topology":"Full-Bridge, Half-Bridge, Push-Pull","Clock Sync":"Yes","Output Type":"PWM Signal","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"10-WDFN Exposed Pad","lifecycle_stage":"eol_hot","Control Features":"Frequency Control, Soft Start","Number of Outputs":"2","Output Configuration":"Positive","Frequency - Switching":"200kHz, 600kHz","Operating Temperature":"-40°C ~ 125°C (TJ)","Synchronous Rectifier":"Yes","Supplier Device Package":"10-WSON (4x4)","Voltage - Supply (Vcc/Vdd)":"15V ~ 90V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.13","stockQuantity":0,"priceTiers":[{"qty":265,"price":"$1.13000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e3f9ff50639f5b3a768b4efeb5d8280b.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM5033SD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM5033SD 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}}