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TPS73225-EP: change to IC part with +-2.5Volt

Stefan Erni
Intellectual 550 points
Part Number: TPS73225-EP
Other Parts Discussed in Thread: ADS1299, TPS60403, TPS65130

I design a board like the

EEG Front-End Performance Demonstration Kit

 (SLAU443B) with the ADS1299 from TI.

There is a +-2.5Volt Power supply with a TPS732225 , TPS723225 and TPS60403

Is there an another powersupply  IC what have all includet? The Input range need to be from 2Volt to 5Volt and on the output is just the ADS1299.

  • 0
    TI__Expert 7445 points
    Hi Erni,

    Per the SLAU443B it uses various IC to generate the voltages required. ( vin = 2V to 5V)
    1. TPS60403 Vin =5V to Vout = -5V
    2. TPS73225 Vin = 5V to Vout = 2.5V
    3. TPS72325 Vin = -5V to Vout = -2.5V

    I will check on TI website under PMIC solutions if there is a PMIC solution available. What are your output current requirements in your system?

    www.ti.com/.../products.html
  • 0 in reply to Ramesh Khanna
    TI__Expert 7445 points
    Hi Erni,

    What is the temp range required in your application are you looking for -EP part i.e. extended temp range ( -55C to 125C) or standard temp. Please confirm.
  • 0 in reply to Ramesh Khanna
    Intellectual 550 points
    Hi Ramesh

    I just need standard temp.

    The ADS1299 on the analog part need about 10mA. It only need +-2.5Volt but "low noise". for the VDDD 3.3V(digital) I have an another chip

    So this chip, I'm looking for, with 20mA to 100mA is perfect.
  • 0 in reply to Stefan Erni
    TI__Expert 7445 points
    Hi Erni,

    We do not have a PMIC that has the two negative outputs and one positive output. However closet thing that I could see is TPS65130 but it has min input to be 2.7V instead of 2V.
    I would think that you would have to stay with the various options as indicated in the reference design.
    I will move the inquiry to the commercial forum to see if they can recommend a solution, as you are looking for standard temperature range part and not an extended temperature range part ( -55C to 125C).