{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3524DM","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3524DM","canonicalUrl":"https://icboms.com/texas-instruments/LM3524DM","factsUrl":"https://icboms.com/api/mcp/products/LM3524DM","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments LM3524DM voltage-mode PWM switching controller, step-up/step-down function, buck/boost topology, 8V to 40V supply, 49% max duty cycle, 16-SOIC package, surface mount.","salesMarkdown":"## What the 49% duty ceiling means for your converter The LM3524DM is a voltage-mode PWM controller from Texas Instruments that handles both step-up (boost) and step-down (buck) topologies. Its 49% maximum duty cycle means the switch is on for less than half the period — this is a deliberate limit that prevents transformer saturation in push-pull designs and keeps the control loop stable in single-ended converters without slope compensation. The controller operates from an 8 V to 40 V supply rail and drives an external transistor via its single output. Output configuration can be positive or negative, giving flexibility for inverting supplies. ## Package and board-fit: 16-SOIC with bulk delivery The supplier device package is 16-SOIC. It ships in Bulk, so expect tube or tray quantities rather than tape-and-reel — plan your pick-and-place feeder setup accordingly. Operating temperature range is 0°C to 125°C junction — this is a commercial/industrial grade part, not rated for -40°C cold starts. If your design sees freezing ambient, the controller itself may not be the limiter, but verify the external pass transistor's low-temperature performance. ## Active lifecycle, but watch the RoHS status However, the part is RoHS non-compliant. This means it contains lead (Pb) above the 0.1% threshold and cannot be used in products sold into EU RoHS-regulated markets without an exemption. For designs that require RoHS compliance, a lead-free alternative from the same functional family would be needed — the LM3524DM itself is not the drop-in for a green BOM. ## Control features and what they let you do Built-in control features include current limiting, an enable pin, and frequency control. The current limit protects the external switch and load during overloads. The enable pin lets a microcontroller or supervisor shut down the converter without removing the input supply. Frequency control allows the oscillator to be synchronized or adjusted with an external RC — useful for shifting the switching noise away from sensitive analog bands. There is no clock sync input and no synchronous rectifier driver — the LM3524DM is a simpler, lower-cost controller for designs that use a freewheeling diode on the output rather than a second FET.","metaTitle":"Texas Instruments LM3524DM Switching Controller, 8-40V","metaDescription":"Texas Instruments LM3524DM voltage-mode PWM controller. Step-up/step-down, buck/boost topology. 8V-40V supply, 49% max duty cycle. Active, RoHS non-compliant.","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":"Buck, Boost","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control","Duty Cycle (Max)":"49%","Number of Outputs":"1","Output Configuration":"Positive or Negative","Operating Temperature":"0°C ~ 125°C (TJ)","Synchronous Rectifier":"No","Supplier Device Package":"16-SOIC","Voltage - Supply (Vcc/Vdd)":"8V ~ 40V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.68","priceTiers":[{"qty":444,"price":"$0.68000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/64a3b5338df80d0b00c84ae54396e04f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3524DM/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to LM3524DM?","answer":"The UCC2806DWTR is a peer device with similar topology support (boost, flyback, forward converter) and a 50% max duty cycle. The LM3524DM has a single output and no synchronous rectifier, so a board redesign would be needed to swap between them."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3524DM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3524DM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-14T23:42:56.621Z","lastPublished":"2026-09-14T23:42:56.621Z","indexable":true}}