{"product_id":"space-efficient-12v-boost-dc-dc-regulator-using-lm2735x","title":"Space-Efficient 12V Boost DC-DC Regulator using LM2735X","description":"\u003cp\u003eThis is a Step-up DC-DC converter that converts\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3V to 5.5V input\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e12V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoutput for up to\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e200mA\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eload current. The project consists of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLM2735X\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.6MHz DC-DC switching converter.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInput Supply 3V to 5.5V\u003c\/li\u003e\n\u003cli\u003eOutput 12V DC\u003c\/li\u003e\n\u003cli\u003eLoad Current Up to 200mA\u003c\/li\u003e\n\u003cli\u003eOperating Frequency 1.6Mhz\u003c\/li\u003e\n\u003cli\u003eInternal Soft Start\u003c\/li\u003e\n\u003cli\u003eInternal Compensation\u003c\/li\u003e\n\u003cli\u003eCurrent-Mode Control\u003c\/li\u003e\n\u003cli\u003e4Pin Header Connector for Input and Output\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 21.75 x 11.91mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLM2735\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edevice is an easy-to-use, space-efficient 2.1-A low-side switch regulator, ideal for Boost and SEPIC DC\/DC regulation. The device provides all the active functions to provide local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23, WSON, and MSOP-PowerPAD packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.\u003c\/p\u003e\n\u003ch4\u003eCurrent Limit\u003c\/h4\u003e\n\u003cp\u003eSW GND The LM2735 uses cycle-by-cycle current limiting to protect the internal NMOS switch. It is important to note that this current limit will not protect the output from excessive current during an output short circuit. The input supply is connected to the output by the series connection of an inductor and a diode. If a short circuit is placed on the output, excessive current can damage both the inductor and diode.\u003c\/p\u003e\n\u003ch4\u003eThermal Shutdown\u003c\/h4\u003e\n\u003cp\u003eThermal shutdown limits total power dissipation by turning off the output switch when the IC junction temperature exceeds 160°C. After thermal shutdown occurs, the output switch does not turn on until the junction temperature drops to approximately 150°C.\u003c\/p\u003e\n\u003ch4\u003eSoft Start\u003c\/h4\u003e\n\u003cp\u003eThis function forces VOUT to increase at a controlled rate during start-up. During soft start, the reference voltage of the error amplifier ramps to its nominal value of 1.255 V in approximately 4 ms. This forces the regulator output to ramp up in a more linear and controlled fashion, which helps reduce inrush current.\u003c\/p\u003e\n\u003ch4\u003eCompensation\u003c\/h4\u003e\n\u003cp\u003eThe LM2735 uses constant-frequency peak current mode control. This mode of control allows for a simple external compensation scheme that can be optimized for each application. A complicated mathematical analysis can be completed to fully explain the internal and external compensation of the LM2735, but for simplicity, a graphical approach with simple equations will be used. Below is a Gain and Phase plot of a LM2735 that produces a 12-V output from a 5-V input voltage. The Bode plot shows the total loop Gain and Phase without external compensation.\u003c\/p\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCN1: Pin 1 = 3 To 5.5V DC Input, Pin 2 = GND\u003c\/li\u003e\n\u003cli\u003eCN2: Pin 1 = 12V Output, Pin 2 = GND\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47242199433388,"sku":"G178","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/G178A.jpg?v=1789721801","url":"https:\/\/dotfry.com\/products\/space-efficient-12v-boost-dc-dc-regulator-using-lm2735x","provider":"dotfry","version":"1.0","type":"link"}