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TPS62125: Regulating voltage below 1.2V

Part Number: TPS62125
Other Parts Discussed in Thread: LMR33620


I have a customer wanting to regulate a 1.02V output, and they have been using TPS62125 to do this. That said, they reached out, as they just discovered that the minimum limit for output voltage is 1.2V. Can you comment on why we set the 1.2V limit if the device is capable of regulating at this voltage level? I'm assuming it has to do with the control scheme of the part and the ability of the part to regulate within spec?

  • Hi Carolus,

    The device regulates from up to 17V Vin down to 1.2V Vout. The duty cycle at this condition is extreme and the time needed is very short and hence is the voltage limit at the output. If you share with me the details of the operating conditions of your customer's application, I may be able to assist you better in choosing a proper device.

    Best regards,
  • Omar,

    That is what I figured, I just wanted to verify. Customers application is

    Vin: 9-20V
    Vout: 1.02V
    Iout: 300mA

    must have adjustable feedback option for a possible Vout switch to 1.25V.

    Based on these parameters, I am recommending LMR33620 to the customer.