The bypass capacitor for VCC should be placed close to the TPS5124.
The bulk storage capacitors across VCC should be placed close to the power
MOSFETs. High-frequency bypass capacitors should be placed in parallel with the
bulk capacitors and connected close to the drain of the high-side MOSFETs and to
the source of the low-side MOSFETs.
For noise reduction, a 0.1-μF
capacitor, CTRIP, should be placed in parallel with the trip resistor
RCL.