{"product_id":"3v-to-5v-boost-dc-dc-converter-using-max711","title":"3V To 5V Boost DC-DC Converter using MAX711","description":"\u003cp\u003eThe circuit shown here is a compact and high-efficiency boost converter that has been designed for hand-held equipment. This boost converter converts 2 cells (3V) DC power into 5V DC with output load current up to 500mA. Typical efficiency when boosting battery inputs is 85%. The circuit is based on\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMAX711\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewhich integrates a step-up DC-DC converter with a linear regulator to provide step-up voltage conversion. The circuit is optimized for battery applications where the input varies above and below the regulated output voltage. The project has an input range from\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e+1.8V to +11V\u003c\/strong\u003e. The circuit is set for 5V output but it has an adjustable output that can be set from +2.7V to +5.5V with the help of two R3, R4 resistors. The IC contains a comparator for low battery detection. If the voltage at LBI+ falls below that at LBI- (typically connected to REF), LBO goes low. Hysteresis is typically 50mV. You can set the low-battery monitor’s threshold with two resistors, R1 and R2.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eMAX711\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eintegrate a step-up DC-DC converter with a linear regulator to provide step-up\/down voltage conversion. The step-up switch-mode regulator contains an N-channel power MOSFET switch. It also shares a precision voltage reference with a linear regulator that contains a P-channel MOSFET pass element. Step-Up Operation A pulse-frequency-modulation (PFM) control scheme with a constant 1μs off-time and variable on-time controls the N-channel MOSFET switch. The N-channel switch turns off when the part reaches the peak current limit or the 4μs maximum on-time. The ripple frequency is a function of load current and input voltage.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupply Input Two AA Cell- 3V DC (+1.8V to +11V Range)\u003c\/li\u003e\n\u003cli\u003eOutput 5V DC (Adjustable 2.5V to 5.5V)\u003c\/li\u003e\n\u003cli\u003eOutput Load 500mA Maximum\u003c\/li\u003e\n\u003cli\u003eEfficiency for battery input is 85%\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":46962189893804,"sku":"G128","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/G128A.jpg?v=1787120377","url":"https:\/\/dotfry.com\/products\/3v-to-5v-boost-dc-dc-converter-using-max711","provider":"dotfry","version":"1.0","type":"link"}