source for optimum phase noise performance. The input range of the LDO allows the device to be powered

directly from a single cell Li battery. The LDO is enabled by either of the CLK_REQ_N signals. When disabled,

the device enters a low power shutdown mode consuming less than 1μA from the battery. The LDO requires

an output decoupling capacitor in the range of 1μF to 10μF with an equivalent series resistance (ESR) of at

least 0.1Ω for compensation and high-frequency PSR. This capacitor must stay within the specified range for

capacitance and ESR over the entire operating temperature range. A ceramic capacitor can be used if a small

external resistance is added in series with the capacitor to increase the effective ESR. An input bypass capacitor

of 1μF or larger is recommended.

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CDC3RL02

SCHS371H – NOVEMBER 2009 – REVISED OCTOBER 2024

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