Hello
We are about to use LMZM23600V5SILT in our new product design.
There we have some doubts about our understanding of the voltage accuracy and the regarding values mentioned in the data sheet.
For our manual and incircuit tests we would like to get the real output voltage accuracy min/max values resulting from input voltage, temperature, with/without load, PFM/FPWM mode...
On page 6 under "FEEDBACK" it says "VFB: Initial output voltage accuracy" -1.5% to 1.5%.
- How does feedback/VFB belong to "output voltage" - meaning is this value the real output accuracy ?
- Or is it just the reference voltage accuracy ? Because it says "VFB"
But then: we assume e.g. some internal FB resistors in the 5V version - what is their influence on accuracy ?
It also says "open loop":
- Does this mean "at no load" ?
- Or is it again somehow regarding the reference ? Could you please explain ?
- How is the load regulation accuracy ? We didn't find a value.
On page 33 fig 77 we see a voltage increase in PFM mode of ~50mV = ~1%.
- But this figure only shows typical values - how about min/max value ?
- So we would assume a total min/max voltage tolerance over load of 5V -1.5% +2.5% ?
The module is said to be a step down converter:
- Page 6 "VFB" says "Vin 4V..36V" - but the 5V version would have to step up ?
- What is the minimum input voltage to deliver mentioned output voltage accuracy (over load, temperature, ...) ?
Help / explanation very much appreciated.
Many thanks,
Torsten
