{"product_id":"5v-step-up-voltage-regulator-u3v40f5","title":"Pololu 5V Step-Up Voltage Regulator U3V40F5 - Medium Power Boost","description":"\u003cdiv class=\"product-copy\"\u003e\n\u003cstyle\u003e\n .product-copy{line-height:1.7;color:#1f2937}\n .product-copy \u003e * + *{margin-top:1rem}\n .product-copy h2{margin:1.4em 0 .6em;color:#111827}\n .product-copy h3{margin:1.1em 0 .5em;color:#111827}\n .product-copy p{margin:0 0 1em}\n .product-copy ul,.product-copy ol{margin:0 0 1.2em 1.2em}\n .product-copy li{margin:.35em 0}\n .product-copy table{width:100%;border-collapse:collapse;margin:1.2em 0}\n .product-copy table th,.product-copy table td{border:1px solid #e5e7eb;padding:.7em .8em;text-align:left;vertical-align:top}\n .product-copy table th{background:#f9fafb;width:32%}\n .faq-list{margin:1.2rem 0 1.4rem}\n .faq{border:1px solid #e5e7eb;border-radius:12px;padding:.85rem 1rem;margin:.6rem 0;background:#fafafa}\n .note{background:#f8fafc;border-left:4px solid #2563eb;padding:.85rem 1rem;border-radius:8px}\n \u003c\/style\u003e\n\u003ch2\u003eRaise Low Input Voltage with 5V Step-Up Voltage Regulator U3V40F5\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e5V Step-Up Voltage Regulator U3V40F5\u003c\/strong\u003e boosts a lower DC input up to a regulated output, making it useful when your source voltage falls below the level your load needs.\u003c\/p\u003e\n\u003cp\u003eIt works well in battery builds, portable electronics, and small robots where input voltage can sag over time.\u003c\/p\u003e\n\u003cdiv class=\"note\"\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Choose a regulator based on your full input-voltage range, startup current, thermal limits, and required headroom. Real output current depends on input voltage, airflow, and temperature.\u003c\/div\u003e\n\u003ch3\u003eWhy you'll love it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTypical efficiency: ~90–95% (VIN\/load dependent)\u003c\/li\u003e\n\u003cli\u003eSwitching frequency: ~600kHz under heavy loads + power-save mode (keeps operation above 20kHz)\u003c\/li\u003e\n\u003cli\u003eNo-load current: typically under 2mA; EN low-power state typically ~35µA per volt on VIN\u003c\/li\u003e\n\u003cli\u003eCurrent behavior: up to 9.5A instantaneous input, ~4.5A for several seconds, ~4A for prolonged durations (thermal dependent)\u003c\/li\u003e\n\u003cli\u003eBoosts low-voltage sources (down to 1.3V after startup) to a stable 5V\u003c\/li\u003e\n\u003cli\u003eGreat for battery projects where 5V is required (MCUs, sensors, radios, small SBC accessories, etc.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat you can build\u003c\/h3\u003e\n\u003cp\u003eUseful for battery projects, portable devices, LED systems, and electronics that need a higher rail from a lower source voltage.\u003c\/p\u003e\n\u003ch3\u003eCompare regulator options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eTopology\u003c\/th\u003e\n\u003cth\u003eOutput\u003c\/th\u003e\n\u003cth\u003eMax current\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU3V40F5\u003c\/td\u003e\n\u003ctd\u003eBoost\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS13V10F5\u003c\/td\u003e\n\u003ctd\u003eBuck-Boost\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD24V10F5\u003c\/td\u003e\n\u003ctd\u003eBuck\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS13V20F5\u003c\/td\u003e\n\u003ctd\u003eBuck-Boost\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD24V22F5\u003c\/td\u003e\n\u003ctd\u003eBuck\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e2.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD36V28F5\u003c\/td\u003e\n\u003ctd\u003eBuck\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e3.2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD30V30F5\u003c\/td\u003e\n\u003ctd\u003eBuck\u003c\/td\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003ctd\u003e3.4 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003ctd\u003e5V Step-Up Voltage Regulator U3V40F5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003ePololu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eU3V40F5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c\/th\u003e\n\u003ctd\u003eDC-DC Step-Up Regulator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTopology\u003c\/th\u003e\n\u003ctd\u003eStep-Up (Boost)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput Voltage\u003c\/th\u003e\n\u003ctd\u003e5 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupport\u003c\/th\u003e\n\u003ctd\u003eOfficial Pololu product search and support resources linked below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOfficial resources\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.pololu.com\/search?query=U3V40F5\" target=\"_blank\" rel=\"noopener\"\u003eFind this product on Pololu\u003c\/a\u003e | \u003ca href=\"https:\/\/www.pololu.com\/resources\" target=\"_blank\" rel=\"noopener\"\u003ePololu support and resources\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the box\u003c\/h3\u003e\n\u003cp\u003e1 × 5V Step-Up Voltage Regulator U3V40F5\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"faq-list\"\u003e\n\u003cdiv class=\"faq\"\u003e\n\u003cstrong\u003eCan I power a microcontroller with this?\u003c\/strong\u003e\u003cbr\u003eYes, if the regulator’s output voltage and current match your controller and all attached loads.\u003c\/div\u003e\n\u003cdiv class=\"faq\"\u003e\n\u003cstrong\u003eWill it run cool at full load?\u003c\/strong\u003e\u003cbr\u003eIt depends on input voltage, airflow, and load current. Check thermal limits in the official Pololu resources.\u003c\/div\u003e\n\u003cdiv class=\"faq\"\u003e\n\u003cstrong\u003eIs this better than a linear regulator?\u003c\/strong\u003e\u003cbr\u003eFor many builds, yes. Switching regulators are usually more efficient and waste less heat.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":52249774915873,"sku":"POL4012","price":744.0,"currency_code":"PHP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/files\/0J11495.1200_1.jpg?v=1769153281","url":"https:\/\/circuit.rocks\/products\/5v-step-up-voltage-regulator-u3v40f5","provider":"circuitrocks","version":"1.0","type":"link"}