{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TPS40056PWP","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TPS40056PWP","canonicalUrl":"https://icboms.com/texas-instruments/TPS40056PWP","factsUrl":"https://icboms.com/api/mcp/products/TPS40056PWP","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TPS40056PWP synchronous buck PWM controller, 10V to 40V supply, 100kHz to 1MHz switching, 90% max duty cycle, 16-HTSSOP PowerPAD package, tube.","salesMarkdown":"## 10V to 40V input, synchronous buck control The TPS40056PWP is a voltage-mode synchronous buck controller from Texas Instruments, designed to regulate outputs from a 10V to 40V supply rail — the wide input range covers 12V, 24V, and 36V intermediate buses common in industrial control and telecom equipment. Switching frequency is programmable from 100kHz to 1MHz via a single resistor on the RT pin, letting the designer trade inductor size against switching losses. The 90% maximum duty cycle supports low-dropout operation when the input rail sags close to the target output voltage. ## Synchronous rectification and control features Built-in synchronous rectification drives external N-channel MOSFETs on both the high-side and low-side, eliminating the Schottky catch diode and improving efficiency at low output voltages — a common requirement for 3.3V and 5V rails derived from a 24V bus. The controller integrates current limiting, soft-start, enable, and frequency control, reducing the external component count to a handful of passives and FETs. The soft-start pin programs the output ramp time with a single capacitor, preventing inrush current at power-up. Clock synchronization allows the TPS40056PWP to lock to an external oscillator, enabling multi-phase interleaved designs that cancel input ripple current — useful when multiple rails share a common input filter. ## 16-HTSSOP PowerPAD thermal management The datasheet layout recommendation (page 7) shows a 4.4mm x 3.4mm pad with thermal vias to the ground plane — nominal is not absolute max, but the pad area directly sets the junction-to-ambient thermal resistance. The controller itself does not carry the switching FETs, so the thermal budget is dominated by the external MOSFETs and inductor. The part is RoHS3 compliant (lead-free) and supplied in tubes of 90 pieces per the standard TI shipping quantity. For new designs, the part is suitable for production.","metaTitle":"TPS40056PWP Buck Controller, 10-40V, 100kHz-1MHz, 16-HTSSOP","metaDescription":"Texas Instruments TPS40056PWP synchronous buck controller, 10V to 40V input, 100kHz-1MHz switching, 90% duty cycle, active production, 16-HTSSOP package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"Yes","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"16-PowerTSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable, Frequency Control, Soft Start","Duty Cycle (Max)":"90%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"100kHz ~ 1MHz","Operating Temperature":"-40°C ~ 85°C (TA)","Synchronous Rectifier":"Yes","Supplier Device Package":"16-HTSSOP","Voltage - Supply (Vcc/Vdd)":"10V ~ 40V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.26","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.26000","currency":"USD"},{"qty":10,"price":"$4.72000","currency":"USD"},{"qty":25,"price":"$4.46240","currency":"USD"},{"qty":100,"price":"$3.86740","currency":"USD"},{"qty":250,"price":"$3.66904","currency":"USD"},{"qty":500,"price":"$3.29222","currency":"USD"},{"qty":1000,"price":"$2.80650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c1a8e85059cd44236f849ea607b41c90.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source to TPS40056PWP?","answer":"The LM25117PMHX/NOPB is the closest functional peer from Texas Instruments — both are synchronous buck controllers with transistor-driver outputs and a single phase. The LM25117 operates from 4.5V to 42V input and extends the junction temperature to 125°C, but it lacks clock synchronization. The pinout and control architecture differ, so a board layout change is required — they are not drop-in replacements."},{"question":"What is the TPS40056PWP switching frequency range?","answer":"The switching frequency is programmable from 100kHz to 1MHz via a resistor from the RT pin to ground. The 1MHz upper limit allows small inductor values, while 100kHz suits designs prioritizing efficiency over board area."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TPS40056PWP","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TPS40056PWP 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}}