TPSM8A28: Using under 3.3V power supply condition

Takashi Onawa

Part Number: TPSM8A28
Other Parts Discussed in Thread: TPS548A28, TPS548A28EVM

Hi Team,

My customer wants to use TPSM8A28 in their system as 3.3V power input condition. Do you think there are any risks such the use case?
I can not check it on Webench since it's only support 4.0V~ power supply.

Here is the my customer's use case
[Requirements]
- Input : 3.3V +/- 5%
- output : 1.0V
- output current : 10A

Regards,

Takashi Onawa

over 2 years ago

0 Peter James Miller over 2 years ago

TI__Mastermind 48160 points

Takashi-san,

What input range does the 3.3V design need to support?

Is there a 4.75 - 5.3V bias available to power VCC separate from the 3.3V supply?

The first page of the TPSM8A28 module datasheet outlines the input voltage range for different conditions and configurations.

0 Takashi Onawa over 2 years ago in reply to Peter James Miller

TI__Genius 13200 points

Hi Peter-san,

Thanks for your prompt response on this.

The range is Input : 3.3V +/- 5%. What they want to do is to eliminate 5V power supply in their power tree if possible.
it looks this device will work up to 3.0V without external biasing.

I want to know what kind of risks will be estimated in such the operation.
Or do you think device will work up to 2.7V min condition with 3.3V biasing(if it is allowable for the device)?

Regards,

Takashi Onawa