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TPS60400: TPS60400 Isupply

Part Number: TPS60400
Other Parts Discussed in Thread: TPS60403

Hi, Team.

I've been asked by Customer below.

Does "supply current" means how much amount of current IC needs to work.

Customer wants to grasp of how much current would be needed for calculation.

Q1. total current would be I supply + Iout, correct?

Q2.in its datasheet, we've used 0.7mA, do we use the 0.7mA as maximum I supply we assume?

where do we get the 0.7mA value since the Isupply graph doesn't show.

  • The TPS60400 is not a logic device, but anyway, the application report Understanding and Interpreting Standard-Logic Data Sheets says:

    4.6.27 ICC Supply Current

    […]
    TI - The current into the VCC supply terminal of an integrated circuit.

    This parameter is the current into the VCC supply terminal of an integrated circuit under static no-load conditions. ICC is tested by applying the specified VCC level and measuring the current into the device.

    The outputs of the device are left open […]

    For the TPS60400, the supply current is the current flowing into the IN pin that also flows out of the GND pin. (Please note that figures 5 and 6 of the datasheet say "IO = 0 mA".) This value is called IQ in section 7.5.

    The total current is the current flowing into the IN pin, which is the sum of the currents flowing out of the OUT and GND pins.

    The 0.7 mA value is the specified worst-case IQ value for the TPS60403 (the graphs show typical values). For the TPS60400, the worst-case IQ value is 0.27 mA.