{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX1771CPA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX1771CPA","canonicalUrl":"https://icboms.com/analog-devices/MAX1771CPA","factsUrl":"https://icboms.com/api/mcp/products/MAX1771CPA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX1771CPA+, current-mode PWM controller, boost/buck-boost topology, 300kHz switching frequency, 92% max duty cycle, single output, transistor driver, 8-PDIP package, 0°C to 70°C.","salesMarkdown":"## A current-mode controller for boost and buck-boost designs The Maxim Integrated MAX1771CPA+ is a current-mode PWM controller designed for step-up (boost) and step-up/step-down (buck-boost) topologies. It drives an external N-channel MOSFET via a transistor driver output, operating at a fixed 300 kHz switching frequency. The controller accepts a supply voltage from 3 V to 16.5 V, making it suitable for battery-powered equipment, multi-cell Li-ion packs, and regulated 12 V industrial rails. Maximum duty cycle of 92% provides headroom for high step-up ratios. The part comes in an 8-pin PDIP through-hole package, which is easy to hand-solder and breadboard during prototyping. ## 300 kHz switching — inductor sizing and EMI The 300 kHz switching frequency is a middle ground between efficiency and magnetics size. It allows the use of small, low-cost inductors and capacitors while keeping switching losses moderate. At this frequency, the controller does not support clock synchronization (no SYNC pin), so it operates as a standalone regulator; multiple converters must rely on external filtering or beat-frequency mitigation if co-located. ## 92% duty cycle — what it means for the boost ratio A 92% maximum duty cycle is the key parameter for boost converter design. It sets the theoretical maximum step-up ratio: Vout ≈ Vin / (1 - D). With D_max = 0.92, the output can be up to 12.5× the input voltage (ignoring diode and switch losses). Practical designs will see lower ratios due to parasitic resistances, but this duty cycle provides generous headroom for generating, say, 12 V from a 3 V input or 24 V from a 5 V rail. ## Lifecycle and sourcing reality The MAX1771CPA+ carries an Active lifecycle status and is ROHS3 compliant. For new designs, the through-hole PDIP package is less common in high-volume SMT builds, but it is widely available through independent distribution and is quoted to order against an RFQ. ## Temperature grade — commercial only Rated for 0°C to 70°C ambient, this part is intended for indoor, temperature-controlled environments such as benchtop instruments, consumer electronics, and office equipment. It is not specified for automotive or industrial extended-temperature applications. If the bill of materials calls for -40°C operation, a different controller with an industrial temperature rating is needed.","metaTitle":"MAX1771CPA+ Boost/Buck-Boost Controller, 300kHz, 8-PDIP","metaDescription":"MAX1771CPA+ current-mode PWM controller for boost and buck-boost topologies. 300kHz switching, 92% duty cycle, 3V-16.5V supply. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tube","Function":"Step-Up, Step-Up/Step-Down","Topology":"Boost, Buck-Boost","Clock Sync":"No","Output Type":"Transistor Driver","Mounting Type":"Through Hole","Output Phases":"1","Package / Case":"8-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Control Features":"Enable","Duty Cycle (Max)":"92%","Number of Outputs":"1","Output Configuration":"Positive","Frequency - Switching":"300kHz","Operating Temperature":"0°C ~ 70°C (TA)","Synchronous Rectifier":"No","Supplier Device Package":"8-PDIP","Voltage - Supply (Vcc/Vdd)":"3V ~ 16.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.35","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.35000","currency":"USD"},{"qty":10,"price":"$4.80800","currency":"USD"},{"qty":25,"price":"$4.54480","currency":"USD"},{"qty":100,"price":"$3.93900","currency":"USD"},{"qty":250,"price":"$3.73700","currency":"USD"},{"qty":500,"price":"$3.35320","currency":"USD"},{"qty":1000,"price":"$2.82800","currency":"USD"},{"qty":2500,"price":"$2.68660","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX1771.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the switching frequency of MAX1771CPA+?","answer":"The MAX1771CPA+ switches at 300 kHz. This fixed frequency is set internally and is not synchronizable to an external clock."},{"question":"Is MAX1771CPA+ RoHS compliant?","answer":"Yes, the MAX1771CPA+ is ROHS3 compliant per the manufacturer's specification."},{"question":"What is the maximum duty cycle of MAX1771CPA+?","answer":"The maximum duty cycle is 92%. This sets the theoretical boost ratio ceiling for the converter design."},{"question":"Can MAX1771CPA+ be used in a SEPIC application?","answer":"The controller is specified for boost and buck-boost topologies only. SEPIC requires a different control architecture (typically a coupled inductor and additional capacitor); this part does not support SEPIC directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX1771CPA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX1771CPA when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}