Place the sense resistor (RSNS) close
to the TPS1210x-Q1 and then connect RSNS using the Kelvin techniques.
Refer to Choosing the Right Sense Resistor Layout for
more information on the Kelvin techniques.
Choose a 0.1 µF or higher value ceramic
decoupling capacitor between VS terminal and GND for all the applications.
Consider adding RC network at the supply pin (VS) of the controller to improve
decoupling against the power line disturbances.
Make the high-current path from the board input
to the load, and the return path, parallel and close to each other to minimize
loop inductance.
Place the external MOSFETs close to the
controller GATE drive pins (G1PU/PD and G2) such that the GATE of the MOSFETs
are close to the controller GATE drive pins and forms a shorter GATE loop.
Consider adding a place holder for a resistor in series with the Gate of each
external MOSFET to damp high frequency oscillations if need arises.
Place a TVS diode at the input to clamp the voltage transients during hot-plug and fast turn-off events.
Place the external boot-strap capacitor close to
BST and SRC pins to form very short loop.
Connect the ground connections for the various
components around the TPS1210x-Q1 directly to each other, and to the TPS1210x-Q1
GND, and then connected to the system ground at one point. Do not connect the
various component grounds to each other through the high current ground
line.