Hello,
I'd like to ask some questions about LMR33620AP-Q1's power-good thresholds.
- The specs of LMR33620AP-Q1's power-good thresholds are referred to the FB voltage. Besides, the reference voltage at the FB pin has variation and its own specs (±1.5%). My question is, does the total error of the power-good threshold in a LMR33620AP-Q1 supply circuit include the FB pin's reference voltage error, too?
- For example, the specs of the VPG-HIGH-UP alone are 105% (Min) and 110% of the FB voltage, but the specs of the FB pin's reference voltage is 0.985 V (Min) and 1.015 V (Max) (i.e. ±1.5%). Therefore, I guess that the total errors of the VPG-HIGH-UP in a supply circuit result in 103% (= 105% × -1.5%) (Min) and 112% (= 110% × +1.5%) (Max). Is it correct?
- Do the power-good upper and lower thresholds have a hysteresis?
- Do the power-good thresholds for rising and falling have a relation? I'm wondering if the Min VPG-HIGH-UP of 105% and the Max VPG-HIGH-DN of 108% can occur on the same chip, for example.
Best regards,
Shinichi Yokota
