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Ultra low power Buck Converter with selectable hysteresis and PWM modes.

Dan1
Intellectual 865 points
Other Parts Discussed in Thread: TPS62125, TPS62120, TPS62122

Hi,

Does TI have an alternative to ADP5310 ? It's an ultra low power buck converter that can be changed between hysteresis and PWM modes depending on the power required by the load. e.g. a microcontroller that is in and out of sleep.

We found ADP5310  because we have used ADP5300 in a previous product (similar to ADP5301 / ADP5302 / ADP5303) but the new product has a much higher battery voltage (9-14V).
ADP5310 is a very impressive SMPS and the only one in our list that can support our battery voltage, but we don't like that it's a multichannel part. This will make it extremely difficult to replace if it were to become obsolete.

We don't really need to be able to manually switch between hysteresis and PWM modes, but we do need great efficiencies when < 1mA and when > 50mA.

Kind regards,

  • 0
    TI__Genius 15135 points

    Hi, Dan 

    It looks you only need one Buck converter with high efficiency at light loading, right?

    Confirm with your requirement: 

    1. Do you need power switch? 

    2. What is the input voltage range? 

    3. What is the output voltage in your application? and loading range? 

  • 0 in reply to Zhao Ma
    Intellectual 865 points

    Thanks Zhao,

    That's correct. High efficiency at light loading.

    1. We don't need a load switch (channel 3 from ADP5310) since we have a few nanopower switches already in our BOM.

    2. The input Voltage is 9V-14V

    3. The output Voltage is 3.3V @ 200mA peak in high power mode, and @ ≤ 1mA when trying to save battery.

    Bonus if we can use the same part to take 3.3V down to 1.1V @ rough max 15mA. This isn't essential because we can always look for something more suited, but would rather reduce the number of unique components in the BOM.

    Kind regards,

  • 0 in reply to Dan1
    TI__Genius 15135 points

    Hi, Dan 

    1. Recommend TPS62125 for 3.3V @ 200mA. 

    2. Recommend TPS62120 / TPS62122 for 1.1V @15mA. 

  • 0 in reply to Zhao Ma
    Intellectual 865 points

    Thanks Zhao,

    That was very helpful.

    Kind regards,