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The RT9367C is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators. This IC can be shutdown by pulling ENA low.<br />In the section of charge pump, The RT9367C can power up 4 white LEDs with regulated constant current for uniform intensity. Each channel (LED1-LED4) can support up to 25mA. The part maintains highest efficiency by utilizing a x1/x1.5/x2 fractional charge pump and low dropout current regulators. An internal 5-bit DAC is used for brightness control. Users can easily configure up to 32-step of LED current by I<sup>2</sup>C interface.<br />In the section of linear regulator, The RT9367C comprises a dual channel, low noise, and low dropout regulator sourcing up to 300mA at each channel. The range of output voltage can be configured from 1.1V to 3.3V by I<sup>2</sup>C interface. The outputs of LDO offer 3% accuracy and low dropout voltage of 250mV @300mA. The LDO also provides current limiting and output short circuit thermal folded back protection.
RT9367C Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>An Integrated Solution for Backlighting and Phone Camera Input Supply </li><li>I<sup>2</sup>C Programmable, 32 Steps Dimming Control and Independent Channel On/Off Control </li><li>Over Temperature Protection </li><li>Power On Reset for Data Register </li><li>Typical 1μA Low Shutdown Current with Interface Fully On </li><li>Charge Pump White LED Driver♦ Over 93% Peak Efficiency Over Li-ion Battery Discharge♦ Typical 85% Average Efficiency Over Li-ion Battery Discharge♦ Support Up to 4 White LEDs♦ Output Current Up to 25mA/Channel 100mA Total♦ 60mV Typical Current Source Dropout♦ 1% Typical LED Current Accuracy♦ 0.7% Typical LED Current Matching♦ Automatic x1/x1.5/x2 Charge Pump Mode Transition♦ Low Input Noise and EMI Charge Pump♦ 5.5V Over Voltage Protection♦ Power On/Mode Transition In-rush Protection♦ 1MHz Random Frequency Oscillator♦ Typical 0.1μA Low Shutdown Current </li><li>Dual LDO♦ Wide Operating Voltage Range♦ Low-Noise Output♦ No Noise Bypass Capacitor Required♦ Fast Response in Line/Load Transient♦ Low Temperature Coefficient♦ Dual LDO Outputs (300mA/300mA)♦ 3% Max Output Accuracy♦ Current Limit Protection♦ Short Circuit Thermal Folded Back Protection♦ Typical 0.1μA Low Shutdown Current </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT9367C Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Camera Phone, Smart Phone </li><li>White LED Backlighting, CMOS Sensor Input Supply </li></ul></div>
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