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TPS65130: About the specifications of TPS65130

user777540
Expert 1020 points
Part Number: TPS65130
Other Parts Discussed in Thread: TPS65131

hello,

I have two questions about the specifications of the TPS65130.

No1
There is MIN "Vin + 0.5V" in VPOS of 6.5 Electrical Characteristics.
For example, when Vin = 5V, can + 5V be output from VPOS?

No2
How can I make sure that the VNEG output is started before or at the same time as the VPOS output when the power is turned on?

best regards

  • 0
    TI__Mastermind 18550 points

    Hello,

    Specification of the device is that minimum VPOS be set to Vin+0.5V. With this said, the device will likely loosely regulate to something close to 5V with 5V input (since there is still ~0.5V drop across the boost diode) but  may not meet the regulation and other specifications.

    TPS65131 has separate enables for VPOS and VNEG that can independently control power on sequence of the output rails. To ensure that VNEG starts before VPOS, you should assert ENN signal first and then assert ENP signal.

    Kind Regards,

    Liaqat