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The RT6203B is an adaptive on-time mode synchronous Buck converter. The main control loop of the RT6203B uses an adaptive on-time mode control which provides a very fast transient response with no external components. The RT6203B operates from 4.5V to 18V VIN input. After the initial power-up, the output voltage can be changed by codes sent into the IC via an I<sup>2</sup>C compatible VID control bus. There are special codes which can be used to program current limit level and thermal shutdown level. Shutdown and startup can be also programmed by special codes. The device also features an adjustable soft-start time. Output voltage is adjustable by resistor divider through the FB pin between 0.8V to 8V.
RT6203B Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>VID Control Range Via I<sup>2</sup>C Compatitable Interface : 0.72V to 1.48V in 10mV Steps </li><li>Adjustable Current Limit </li><li>Adjustable Thermal Shutdown </li><li>Fast Transient Response </li><li>Adjustable Output Voltage from 0.8V to 8V </li><li>Steady 700kHz Switching Frequency </li><li>Optimized for All Ceramic Capacitors </li><li>Externally-Adjustable, Pre-Biased Compatible Soft-Start </li><li>Input Under-Voltage Lockout </li><li>Output Over- and Under-Voltage Protection </li><li>Power Good Output </li><li>Thermal Shutdown </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT6203B Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Industrial and Commercial Low Power Systems </li><li>Computer Peripherals </li><li>LCD Monitors and TVs </li><li>Green Electronics/Appliances </li><li>Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs </li></ul></div>
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