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Original question:

TPS769: Minimum Input Voltage

recommend regulator for sub1 ghz

Manu pillai
Prodigy 175 points
Other Parts Discussed in Thread: CC1352P7, TPS769, TPS7A02

HI folks 

we are using Cc1352p7 with accelerometer with Lisocl2 battery(3.6v) without any regulator..so most of the design utilising TPS LDO for the power section..so please guide us that the TPS regulators are really  required since the cc1352p7 voltage will support from 3-3.7V and accelerometer supports from 3 to 3.9V)

  • 0
    TI__Mastermind 18466 points

    Hello Manu, 

    Are you asking whether you can use the TPS769 with the CC1352P7? or is this question for the microprocessor team?

    Best,

    Juliette

  • 0 in reply to Juliette
    Prodigy 175 points

    Hi Juliette

    My question is 

    Is it a must to use the TPS 769 for our design ?(since all the devices  voltages are in the range (3-3.8v) also battery voltage is 3.6V

    what is the relevance of using the TPS incase if the devoices voltages are in the range(3-3.8V)

  • 0 in reply to Manu pillai
    TI__Mastermind 18466 points

    Hey Manu, 

    Thank you for clarifying.

    Generally an LDO is used to keep a stable voltage output to your microprocessor, regardless of transients on your input. 

    Further, if you don't need power to your MPIC, choosing an LDO with a low IQ and enable capabilities can reduce the power consumption on your battery. 

    It also helps to keep an isolated rail for your MPIC if you're powering multiple things with the same battery - this is less of a concern than the previous two. 

    You can decide to power directly from the battery, but it is good practice to have a step between your power supply and your microprocessor for debugging or protection. It is often easier and cheaper to replace an LDO than a MPIC. 

    Best,

    Juliette

  • 0 in reply to Juliette
    Prodigy 175 points

    Hi Juliette

    Thanks a lot for you apt reply ...can you please suggest an LDO with the following requirement? ...

    Vin=3.67V

    Vout=3.3 V

    Peak current 100mA(only while triggering the Radio -30minutes of interval)

    Chip=CC1352P7

    Sensor =adxl345

  • +1 in reply to Manu pillai
    TI__Mastermind 18466 points

    Hi Manu, 

    We recommend the TPS7A02 for your application. 

    Best,

    Juliette

  • +1 in reply to Juliette
    Prodigy 175 points

    Hi Juliette

    Thanks a lot for your support..