TDA21590AUMA1 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.
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.
What differs here is Switching Frequency 100 kHz to 1.5 MHz recommended, PWM input, together with Output Current 90 A maximum average load current, absolute-maximum rating; usable operating current depends on electrical and thermal conditions.
Its advantage is that the specification is published and stable, so the design does not depend on bench characterisation.
