Other Parts Discussed in Thread: TPS62261, TPS62293-Q1,
Hello TI,
Justify decision on whether the TPS62251 is capable of supporting the circuit requirements, if the worse case calculated peak current is 700mA.
Our understating:
The 600mA is an average output current of the TPS62261 power supply circuit, but it is not the actual limitation. The average output current of a SWPS is depended upon the selection of the discrete components (particularly the buck inductor) that make up the power supply in addition to the controller selection. The actual limitation of the power supply controller is the peak current limit of the component(internal FETs), which for the TPS62261 is 1.0A typical (0.8A to 1.2A min/max) cycle-by-cycle current limit of the current mode switching power supply as per its datasheet.