TDA21490AUMA1 is a Infineon smart power stage.
A smart power stage combines the driver and power switches for a synchronous converter, with current and temperature reporting built in.
This ordering code is specified at 39.
It is used in point-of-load supplies and processor power, where the part has to hold its specification over the life of the equipment.
Within the family, this ordering code is the one specified for 0.25 to 5.5 V output voltage.
On the bench, the parameters that decide the design are Input Voltage 4.25 to 16 V and VCC and VDRV Supply 4.25 to 5.5 V.
The variant is defined by Switching Frequency 200 kHz to 1.5 MHz recommended, PWM input and Output Current 70 A maximum average and 90 A maximum peak load current, absolute-maximum ratings; operating current depends on electrical and thermal conditions.
The reason to choose it is the fit between the specification and the function it performs on the board.
