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TPS22960: ON pin

Zoe Ko
Expert 3810 points
Part Number: TPS22960
Other Parts Discussed in Thread: TPS22917, TPS22916, TPS22919

Hi team,

The application power path is CR2032(3V battery) --> TPS22960(there is another button switch between CR2032 and TPS22960 ON pin) --> MCU

Due to the mechanical design, need a part max height< 0.7mm and no ball lead package. I didn't find any single channel part meet the requirement and just the TPS22960 meet the requirement. We connect Vin together, VOUT together, ON together and used as single channel.

It's with battery power system, total current should be very very small for longer life time.

In datasheet, ON pin cannot let floating, we will let ON pin with a pull down resister and connect to MCU GPIO.

We would like to know ON pin pull down resister can be 3Mohm for very small power dissipation?

Or do you have any recommend single channel part meet the requirement?

Thank you!  

 

  • 0
    TI__Genius 10855 points

    Hi Zoe,

    Most of our devices that have ultra-low leakage are in a BGA ball package or a SOT-23 package (larger height). These devices include the TPS22916, TPS22917, and TPS22919.

    Can you elaborate on the height and non-BGA requirement? Why are both of these requirements essential?

    You are also correct with the ON pin. The pin cannot be left floating or an in undetermined state, so you can add a large resistor as a pull-down to pull the pin to GND when disabled.

    Thanks,

    Arthur Huang

    To find the latest information on Power Switches, visit www.ti.com/powerswitch