{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC1147LCS8#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC1147LCS8~4PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC1147LCS8~4PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC1147LCS8%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC1147LCS8#PBF, Step-Down Buck Controller, 3.5V-14V Supply, Transistor Driver Output, 100% Duty Cycle, 8-SOIC (0.154\", 3.90mm Width), Tube.","salesMarkdown":"## Buck controller with 100% duty cycle capability The LTC1147LCS8#PBF: It operates from a 3.5V to 14V supply rail and delivers a transistor driver output for the external switch. A key feature for low-dropout operation is the 100% maximum duty cycle — the controller can keep the external switch on continuously, passing the input voltage straight to the output with minimal headroom. This matters when the input rail sags close to the target output voltage, such as in battery-powered systems near end-of-discharge. The controller does not include synchronous rectification, so the external MOSFET and a Schottky catch diode handle the switching cycle. This keeps the BOM simple and avoids the shoot-through risk of a complementary FET pair, at the cost of slightly higher diode conduction loss at high currents. ## Supply range, temperature grade, and control The input supply range (Vcc/Vdd) spans 3.5V to 14V, covering standard 5V and 12V rails as well as 3.6V lithium-ion battery packs. The single positive output is configured as a step-down regulator with current-limit and enable control features. It is not specified for automotive or extended industrial temperature operation. The controller uses current-mode architecture with the enable pin allowing the regulator to be shut down for power savings. The current-limit feature protects the external MOSFET and inductor during overload or startup into a pre-biased output. ## 8-SOIC package and surface-mount assembly Housed in an 8-lead SOIC package (8-SOIC, 0.154\" body width, 3.90mm pitch), the LTC1147LCS8#PBF is a surface-mount device supplied in tube packaging. The supplier device package is designated 8-SO. The SOIC-8 footprint is standard and widely supported by PCB layout tools. The narrow body width keeps the board footprint compact, suitable for space-constrained power sections on mixed-signal boards.","metaTitle":"LTC1147LCS8#PBF Buck Controller, 3.5-14V, 8-SOIC","metaDescription":"LTC1147LCS8#PBF step-down DC/DC controller from Analog Devices. Active, ROHS3 compliant. 3.5V-14V supply, 100% duty cycle, 8-SOIC. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Function":"Step-Down","Topology":"Buck","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Surface Mount","Output Phases":"1","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Control Features":"Current Limit, Enable","Duty Cycle (Max)":"100%","Number of Outputs":"1","Output Configuration":"Positive","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-SO","Voltage - Supply (Vcc/Vdd)":"3.5V ~ 14V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.18","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$9.18000","currency":"USD"},{"qty":10,"price":"$8.29600","currency":"USD"},{"qty":25,"price":"$7.90960","currency":"USD"},{"qty":100,"price":"$6.86800","currency":"USD"},{"qty":250,"price":"$6.55928","currency":"USD"},{"qty":500,"price":"$5.98052","currency":"USD"},{"qty":1000,"price":"$5.46000","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to LTC1147LCS8#PBF?","answer":"The LTC1148CS#PBF is the closest peer in the same family. Both are step-down controllers in 8-SOIC with current-limit and enable control. The key difference is that LTC1148CS#PBF includes synchronous rectification, which improves efficiency at higher output currents but adds a second external MOSFET and a more complex gate-drive layout."},{"question":"What compliance documentation does Analog Devices provide for LTC1147LCS8#PBF?","answer":"The part is ROHS3 compliant. Analog Devices provides the standard datasheet and RoHS compliance declaration. 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/analog-devices/LTC1147LCS8~4PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC1147LCS8~4PBF 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}}