JAJSQ97J may 2009 – january 2021 XIO2001
PRODUCTION DATA
If VAUX power is available in the system, the XIO2001 has the VDD_33_AUX pin to support this feature. Without fully understanding a system’s VAUX power distribution design, recommending external components for the XIO2001 is difficult. At a minimum, a 0.1-μF bypass capacitor is placed near the XIO2001 and attached to the system’s VAUX power supply. A robust design may include a Pi filter with bulk capacitors (5 μF to 100 μF) to minimize voltage fluctuations. When the system is cycling main power or is in the VAUX state, the VDD_33_AUX terminal requirements are that the input voltage cannot exceed 3.6 V or drop below 3.0 V for proper operation of the bridge.
If VAUX power is not present within the system, this terminal is connected to VSS through a resistor with a value greater than 3 k Ω.