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The RT5736 is a step-down converter that delivers a digitally programmable output from an input voltage supply of 2.5V to 5.5V. The output voltage is programmed through an I<sup>2</sup>C interface that can operate up to 3.4MHz.Using a proprietary architecture with synchronous rectification, the RT5736 is capable of delivering a continuous 5.5A and maintains high efficiency at load currents as low as 10mA. The regulator operates at a nominal fixed frequency of 2.4MHz, which reduces the external component counts. Additional output capacitance can be added to improve regulation during load transients without affecting stability.At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate in power-saving mode, with a typical quiescent current of 45μA at room temperature. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed frequency control, operating at 2.4MHz. In shutdown mode, the supply current is typically 0.1μA, which is excellent for reducing power consumption. The PFM mode can be disabled if the fixed frequency is preferred. The RT5736 is available in a small WQFN-20L 3.5x3.5 package. The recommended junction temperature range is -40°C to 125°C.
RT5736 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Programmable Output Voltage Range from 0.27V to 1.4V with 6/25mV/bit </li><li>Programmable Slew Rate for Dynamic Voltage Scaling (DVS) </li><li>Steady 2.4MHz Switching Frequency </li><li>Fast Load Transient </li><li>Continuous Output Current Capability: 5.5A </li><li>2.5V to 5.5V Input Voltage Range </li><li>Digitally Programmable Output Voltage </li><li>I<sup>2</sup>C-Compatible Interface up to 3.4Mbps </li><li>PFM Mode for High Efficiency at Light Load </li><li>Quiescent Current in PFM Mode: 45μA (Typical) </li><li>Input Undervoltage-Lockout (UVLO) </li><li>Over-Temperature Protection and Overload Protection </li><li>Power-Good Indicator </li></ul></div>
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RT5736 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Application, Graphic, and DSP Processors:ARM<sup>TM</sup>, Tegra<sup>TM</sup>, OMAP<sup>TM</sup>, NovaThor<sup>TM</sup>, ARMADA<sup>TM</sup>, Krait<sup>TM</sup>, and more. </li><li>Hard Disk Drives, LPDDR3, LPDDR4, LPDDR5 </li><li>Tablets, Netbooks, Ultra-Mobile PCs </li><li>Smart Phones </li><li>Gaming Devices </li></ul></div>
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