TPS62203: Startup from USB power, 100mA max

Winfield Hill

Part Number: TPS62203

In a system that's powered from USB, the TPS62203 is creating 3.3 volts, which powers a CPU, that then seeks and gets permission to draw up to 500mA. But prior to that time, we're only allowed to draw 100mA. What inductor and output capacitor values will guarantee that 3.3-volts is reached during the 60mA soft-start time? How long is the 60mA time?

over 4 years ago

0 Febin over 3 years ago

TI__Mastermind 19250 points

Hi Winfield,

In general, soft start depends on total capacitance on the output as well as the load current during start up. Since we do not have characterization data for all measurement conditions readily available, I recommend to follow the datasheet specifications. You could start with the BOM used in the EVM and see if you achieve the desired output voltage in your application.

Regards,

Febin

0 Febin over 3 years ago in reply to Febin

TI__Mastermind 19250 points

Hi Winfield,

Do you have some updates? Could you try with the EVM BOM?

Regards,

Febin

0 Febin over 3 years ago in reply to Febin

TI__Mastermind 19250 points

Hi Winfield,

I hope you could solve your problem. I am closing this thread for now. Please feel free to contact us for any further support.

Regards,

Febin

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TPS62203: Startup from USB power, 100mA max