7.3.2 VREF and REFIN, VDDQ Output Voltage

The part provides a 1.8-V, ±0.8% accurate, voltage reference from VREF. This output has a 300-μA (max) current capability to drive the REFIN input voltage through a voltage divider circuit. A capacitor with a value of 0.1-μF or larger should be attached close to the VREF terminal.

The VDDQ switch-mode power supply (SMPS) output voltage is defined by REFIN voltage, within the range between 0.7 V and 1.8 V, programmed by the resister-divider connected between VREF and GND. (See section.) A few nano farads of capacitance from REFIN to GND is recommended for stable operation.