SNVS723G October 2011 – July 2018 LMZ10500
The input supply must be able to supply the required input current to the LMZ10500 converter. The required input current depends on the application's minimum required input voltage (VIN-MIN), the required output power (VOUT × IOUT-MAX), and the converter efficiency (η).
IIN = VOUT × IOUT-MAX / (VIN-MIN × η)
For example, for a design with 5-V minimum input voltage,1.8-V output, and 0.5-A maximum load, considering 90% conversion efficiency, the required input current at steady state is 0.2 A.