EVM3834C-PA-01A no load current consumption

DC-DC Power Converters
1

Dear technical support,
During my evaluation using EVM3834C-PA-01A development board, I noticed a suspicion behavior. Without any load connected to the output, it consumes about 18mA from input (Vin=5V, Vout=1V). Can you explain why it’s the case?

Kind regards,
Sasan

2

Hello Sasan,

That’s weird, the quiescent current should have a typical value of around 500uA.
A few questions that may need answers to consider what is happening here:

  • Does this current consumption change when you decrease the input?
  • Do your losses come as expected when there is a load?
  • What kind of setup are you using here? Long wires can add line resistance / inductance that can contribute to loss here. If you optimize this, does the no load current consumption change?
  • How is this 18mA being measured?