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TPS7B63-Q1: Required input voltage enough to output 5.0V

Part Number: TPS7B63-Q1

Hi team,

My customer wants to check the input voltage enough to output 5.0V at 200mA.

The datasheet mentions 325mV of the maximum dropout voltage. But, the input voltage condition is 14Vin.

If customer uses other Vin voltages, is the maximum dropuout voltage changed? Or, can we say the maximum dropout voltage is within 325mV if customer use Vin in recommend operating condition?

Regards,

Saito

  • Hello Saito,

                     The required dropout voltage does not change with the magnitude of Input voltage. The required dropout however does change (it scales linearly) with load current. Therefore for a load current of 200mA and VOUT = 5V, a VIN ≥ 5.325V (since max dropout = 325mV) would ensure regulation across temperature. However as VIN increases so does the power dissipated across the die. With VIN = 14V, VOUT = 5V & IOUT = 200mA, the power dissipated across the die, PD, equals 1.8W. Please operate at an ambient temperature that ensures that the junction temperature does not exceed 125°C. Thanks!

    Regards,

    Srikanth