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PTR08060W: High quiescent current

Fraser Galloway
Prodigy 10 points
Part Number: PTR08060W

The PTR08060W is drawing 50mA with no load, a 1mA resistive load, and 0.5A load. The input voltage is 10.8V and output set to 5V. A 100uF electrolytic capacitor is on the input and 100uF electrolytic is on the output. The resistor is set for a 5V output as per the datasheet.

The same behavior is seen across multiple devices. The datasheet makes no mention of quiescent current. . 

Is the normal behavior?

We have some high loads of up to 1A to 1.2A for 1 minute or so, otherwise the DCDC is meant to supply a load load of ~1mA. since we are running off a battery. A 50mA overhead when in sleep mode will make this useless for battery power applications with a low duty cycle.

  • 0
    TI__Expert 8130 points

    Hi Frasor,

    I ran some tests on my bench to double check the results and that is normal behavior. A ~50mA Iq is expected.
    A suggestion to work around your battery application: Disable the device by applying a low-level ground signal to the Inhibit Pin (1) when in the low power mode and enable when out of sleep mode.

    Regards,
    Alejandro