JAJS472C August 2010 – April 2018 TPS54320
PRODUCTION DATA.
The output voltage is set with a resistor divider from the output (VOUT) to the VSENSE pin. TI recommends to use 1% tolerance or better divider resistors. Referring to the application schematic of Figure 34, start with a 10-kΩ resistor for R9 and use Equation 1 to calculate R8. To improve efficiency at light loads, consider using larger value resistors. If the values are too high, the regulator is more susceptible to noise and voltage errors from the VSENSE input current are noticeable.
where
The minimum output voltage and maximum output voltage can be limited by the minimum on time of the high-side MOSFET and bootstrap voltage (BOOT-PH voltage) respectively. See Minimum Output Voltage and Bootstrap Voltage (BOOT) and Low Dropout Operation for more information.