TPS552882-Q1: TPS552882-Q1 Voltage range for 5A

HI Mohamed,

The Webench is not so smart, from the bench test result, it is ok to operate with Vin: 2.8V-5.5V, Vout=5V, Iout=5A. Please fill in the Calculation Tool and send the schematic to us for review when finished.

And note that:

1. Since this device has Vin UVLO function, the maximum input rising voltage is 3.0V, it means if the Vin start up voltage is 2.8V, it could not satisfy the Vin_UVLO voltage so the device can't output. But if the device has already finished startup, the Vin falling voltage can support 2.7V.

2. Since the Vin is only 2.8V with high output power, with some transient loading, the input voltage may be pulled down and smaller than 2.7V, it could cause the device shutdown because the maximum input falling voltage is 2.7V.

BRs,

Bryce

Hello Bryce,

I'm worried if we use it and then our device it does not even start up. because I checked in this forum and it seems many people faced problems with this IC regarding the current can provided. 

Regards. 

Hi Bryce,

Well maybe, some issues with other people's designs as long as you are sure that will provide 5A for both cases 5V and 3.3V output for 2.8V--->5V input that is fine. 

My question now is is it better to use 400Khz or 2Mhz design? 

Thanks!