JAJSIE2A december 2019 – april 2023 LM5163H-Q1
PRODUCTION DATA
The feedback voltage at FB is compared to an internal 1.2-V reference. The LM5163H-Q1 voltage regulation loop regulates the output voltage by maintaining the FB voltage equal to the internal reference voltage, VREF. A resistor divider programs the ratio from output voltage VOUT to FB.
For a target VOUT setpoint, use Equation 10 to calculate RFB2 based on the selected RFB1.
TI recommends selecting RFB1 in the range of 100 kΩ to 1 MΩ for most applications. A larger RFB1 consumes less DC current, which is mandatory if light-load efficiency is critical. TI does not recommend RFB1 larger than 1 MΩ as the feedback path becomes more susceptible to noise. Routing the feedback trace away from the noisy area of the PCB and keeping the feedback resistors close to the FB pin is important.