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The RT8206 dual step-down, Switch Mode Power Supply (SMPS) controller generates logic supply voltages in battery powered systems. The RT8206 includes two Pulse Width Modulation (PWM) controllers fixed at 5V/3.3V or adjustable from 2V to 5.5V. This device also features a linear regulator providing a fixed 5V output. The linear regulator provides up to 70mA output current with automatic linear regulator bootstrapping to the BYP input. The RT8206 includes on-board power up sequencing, the power good outputs, internal soft-start, and internal soft-discharge output that prevents negative voltages on shutdown. A constant on-time PWM control scheme operates without sense resistors and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The unique ultrasonic mode maintains the switching frequency above 25kHz, which eliminates noise in audio applications. Other features include Diode Emulation Mode (DEM), which maximizes efficiency in light load applications, and fixed frequency PWM mode, which reduces RF interference in sensitive application. The RT8206 is available in the WQFN-32L 5x5 package.
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<div class="spec-list"><ul class="lv1"><li>Wide Input Voltage Range 6V to 25V </li><li>Dual Fixed 5V/3.3V Outputs or Adjustable from 2V to 5.5V, 1.5% Accuracy </li><li>Independent Enable and Power Good </li><li>5V Fixed LDO Output : 70mA </li><li>2V Reference Voltage ±1% : 50μA </li><li>Constant ON-Time Control with 100ns Load Step Response </li><li>Frequency Selectable via TON Setting </li><li>R<sub>DS(ON)</sub> Current Sensing and Programmable Current Limit </li><li>Selectable PWM, DEM or Ultrasonic Mode </li><li>Internal Soft-Start with 5 Steps Current Limiting and Soft-Discharge </li><li>High Efficiency Up to 97% </li><li>5mW Quiescent Power Dissipation </li><li>Thermal Shutdown </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Notebook and Sub-Notebook Computers </li><li>3-Cell and 4-Cell Li+ Battery-Powered Devices </li></ul></div>
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