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TPS62903: Operating Quiescent Current

Part Number: TPS62903

Dear Sir,

There is a efficiency figure in data sheet. The efficiency of output @0.001A(1mA) is about 90%..

The Operating Quiescent Current is 8mA. Is it correct?

  • Hi David,

    The 8mA Iq spec in the datasheet refers to PWM mode switching operation. In this efficiency plot Auto PFM/PWM mode is used which will decrease the Iq at light loads to maintain high efficiency. In Auto PFM/PWM mode the inductor current because discontinuous (drops down to 0) and the device saves energy by reducing the switching frequency.

    Let me know if you have any other questions.

    Thanks,

    Joseph