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The RT5742 is a step-down switching voltage regulator 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 capable of operating up to 3.4MHz.<br /><br />Using a proprietary architecture with synchronous rectification, the RT5742 is capable of delivering 2A continuously at over 80% efficiency, maintaining that efficiency at load currents as low as 10mA. The regulator operates at a nominal fixed frequency of 2.4MHz, which reduces the value of the external components. Additional output capacitance can be added to improve regulation during load transients without affecting stability.<br /><br /> At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate in Power-Save Mode with a typical quiescent current of 50&mu;A 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 the Shutdown Mode, the supply current drops below 1&mu;A, reducing power consumption. The PFM Mode can be disabled if fixed frequency is desired. The RT5742 is available in a small WL-CSP-11B 1.31x1.62 (BSC).<br /><br />The recommended junction temperature range is -40&deg;C to 125&deg;C.
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  • 输出电压可调范围：0.3-1.3V，5mV解析度
  • 电压变换速率可调
  • 工作频率：2.4MHz
  • 快速瞬态响应
  • 连续电流输出能力：2A
  • 输入电压范围：2.5V-5.5V
  • 数位可调整输出电压
  • I2C 介面，工作频率可达 3.4MHz
  • 轻载时工作于 PFM 模式以提高效率
  • 静态耗电：50μA（典型值）
  • 输入欠压闭锁保护
  • 过热关机保护和超载保护
  • 可做开机时序控制用的Power Good 指示信号
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可穿戴和便携式电子设备 DDR记忆体，LPDDR3，LPDDR4，LPDDR5 平板电脑，网络笔记型电脑，超移动个人电脑 智能扬声器，语音助手设备 电视棒，OTT和家庭娱乐设备
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