ZHCSIQ0F August 2018 – August 2020 TPS2120 , TPS2121
PRODUCTION DATA
IN1, IN2, and OUT traces should all be wide enough to accomodate the amount of current passing through the device. Bypass capacitors on these pins should be placed as close to the device as possible. Low ESR ceramic capacitors with X5R or X7R dielectric are recommended.
To avoid output voltage drop, the capacitance on OUT can be increased. If the power supply cannot handle the inrush current transients due to the output capacitance, a higher input capacitance can be used. In the case where there are long cables or wires connected to the input of the device, there may be ringing on the supply, especially during the fast switchover of the TPS2121. To help nullify the inductance of the cables and prevent ringing, a large capacitance can be used near the input of the device.