{"product_id":"mini-dc-dc-step-up-boost-converter-0-9-5v-to-3-3v-5v-500ma-arduino-2pack","title":"Mini DC-DC Step-Up Boost Converter — 0.9–5V to 3.3V\/5V, 500mA, Arduino (2-Pack)","description":"\u003ch2\u003eMini DC-DC Step-Up Boost Converter — 0.9–5V to 3.3V \/ 5V Fixed, 500mA (2-Pack)\u003c\/h2\u003e\u003cp\u003eThis ultra-compact step-up (boost) converter module accepts input voltages as low as 0.9V and boosts them to a fixed 3.3V or 5V output at up to 500mA. Based on a high-efficiency switching regulator IC, it enables single-cell alkaline (1.5V), NiMH (1.2V), or Li-ion (3.7V) batteries to power 3.3V and 5V microcontroller circuits. The miniature PCB footprint makes it ideal for embedding in battery-powered Arduino, ESP8266, and sensor node projects where space is critical.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e0.9V – 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V or 5V (fixed, select variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current\u003c\/td\u003e\n\u003ctd\u003e500mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003eUp to 96%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e~1MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInput Voltage vs Output Current Capability\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Voltage\u003c\/th\u003e\n\u003cth\u003eMax Output Current (5V out)\u003c\/th\u003e\n\u003cth\u003eBattery Source\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.9V\u003c\/td\u003e\n\u003ctd\u003e~50mA\u003c\/td\u003e\n\u003ctd\u003eSingle depleted alkaline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.2V\u003c\/td\u003e\n\u003ctd\u003e~100mA\u003c\/td\u003e\n\u003ctd\u003eSingle NiMH cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.5V\u003c\/td\u003e\n\u003ctd\u003e~150mA\u003c\/td\u003e\n\u003ctd\u003eSingle alkaline AA\/AAA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.7V\u003c\/td\u003e\n\u003ctd\u003e~400mA\u003c\/td\u003e\n\u003ctd\u003eSingle Li-ion \/ LiPo cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4.2V\u003c\/td\u003e\n\u003ctd\u003e~500mA\u003c\/td\u003e\n\u003ctd\u003eFully charged Li-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose This Boost Converter?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.9V minimum input\u003c\/strong\u003e — extracts maximum energy from nearly depleted batteries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed output\u003c\/strong\u003e — stable 3.3V or 5V without adjustment, plug-and-play for MCU power\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-compact\u003c\/strong\u003e — smallest boost converter module, fits inside battery compartments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e96% efficiency\u003c\/strong\u003e — minimal battery drain from converter losses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-pack value\u003c\/strong\u003e — one for the project, one for the next build\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With \/ Common Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino Pro Mini (3.3V)\u003c\/strong\u003e: Single AA battery (1.5V) → 3.3V boost → Arduino Pro Mini 3.3V for ultra-low-power sensor node\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESP8266 \/ ESP32\u003c\/strong\u003e: Single Li-ion (3.7V) → 3.3V boost for stable ESP8266 power (avoids LDO dropout issues)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-cell Li-ion to 5V\u003c\/strong\u003e: 3.7V LiPo → 5V boost for USB charging or 5V Arduino from single cell\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoin cell power\u003c\/strong\u003e: CR2032 (3V) → 3.3V boost for BLE beacon or RTC module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy harvesting\u003c\/strong\u003e: Solar cell (0.9–3V) → 3.3V boost for low-power IoT sensor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Can this boost converter power ESP8266 from a single AA battery?\u003c\/strong\u003e\u003cbr\u003eA: Yes, with limitations. A single AA (1.5V fresh, 1.0V depleted) boosts to 3.3V. At 1.5V input, output current is ~150mA. ESP8266 draws ~80mA average but peaks at ~300mA during WiFi TX. The 150mA limit may cause voltage dips during WiFi transmission. Add a 470μF capacitor at the output to buffer peak current. For reliable ESP8266 WiFi operation, use 2×AA (3V input) for ~300mA output capability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the difference between a boost converter and an LDO regulator?\u003c\/strong\u003e\u003cbr\u003eA: An LDO (low-dropout) regulator steps voltage DOWN (e.g., 5V→3.3V) and wastes the difference as heat. A boost converter steps voltage UP (e.g., 1.5V→3.3V or 5V) with high efficiency. Use a boost converter when your battery voltage is lower than the required supply voltage. Use an LDO when your supply is higher than needed and efficiency is less critical.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I use this module to charge a Li-ion battery?\u003c\/strong\u003e\u003cbr\u003eA: No — this is a power supply module, not a battery charger. It provides a regulated output voltage for powering circuits. To charge Li-ion batteries, use a dedicated charger IC (TP4056, MCP73831). Do not connect the boost converter output to a Li-ion battery terminal.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2× Mini DC-DC Step-Up Boost Converter Module (output voltage as selected)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"5V output","offer_id":46991469052139,"sku":"14:1202#5V output","price":5.96,"currency_code":"USD","in_stock":true},{"title":"3.3V output","offer_id":46991469084907,"sku":"14:350852#3.3V output","price":5.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/dc-dc-mini-step-up-boost-converter-arduino.webp?v=1761634701","url":"https:\/\/keszoox.com\/products\/mini-dc-dc-step-up-boost-converter-0-9-5v-to-3-3v-5v-500ma-arduino-2pack","provider":"Keszoox","version":"1.0","type":"link"}