Tool/software:
Dear TI,
I'm using the TPS75901KTTR, with 5V input voltage (from a power supply) and 3.3V output voltage. From the datasheet, it says "Quiescent current is 125 µA at full load", it led me to believe that the input current is only 125uA even at 7.5A output current. However, when I tested it with output connected to a DC electronic load in constant current/resistance mode, whatever output current I'm using, the input current is the same value, eg if output current = 1A, the input current is also 1A, so the input current was never 125uA. With this, please help me with my questions below?
1. Is the input current = output current?
2. If the input current = output current, does that create a lot of heat given the input power is always much higher than output power?
Would appreciate if you can help advise.
Thank you.
Regards,
Calvin