JAJSQ92 june 2023 TPSM843A22
PRODUCTION DATA
A 0.1-µF ceramic capacitor is integrated inside the module connected between the BOOT and SW pin.
A resistor can be added in series with the BOOT capacitor to slow down the turn-on of the high-side MOSFET and reduce overshoot rising edge overshoot on the SW pin. This action comes with the tradeoff of more power loss and lower efficiency. As a best practice, include a 0-Ω placeholder in prototype designs in case parasitic inductance in the PCB layout results in more voltage overshoot at the SW pin than is normal. This action helps keep the voltage within the ratings of the device and reduces the high frequency noise on the SW node.