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TPS753: Regulating 3.7V battery into 3.3V

Seyed Sajjad Mirbakht
Prodigy 30 points
Part Number: TPS753

Hi,

I am going to use TPS753 (digikey) to power up my custom-designed medical device with 3.3V. My device has a maximum current consumption of 400mA and I am planning to use a 3.7V - 2700mAh - Li-Ion battery to feed the device.

Based on the datasheet of the product (datasheet) Figure 11, there will be ~160mV Dropout Voltage @ +25 C which looks fine to get 3.3V from 3.7V battery.

I was wondering if my predication is true or I should take other parameters into consideration?

Thank you,

Sajjad.

  • +1
    TI__Genius 12040 points

    Hello Sajjad,

                        The dropout spec is provided in the EC table of the datasheet, and it equals a max value of 300mV at 1.5A. The dropout scales with load current, and therefore, at a load current of 400mA you are providing sufficient dropout with VIN = 3.7V and VOUT = 3.3V. Thanks!

    Regards,

    Srikanth