LM5060-Q1: the Variation Data

Tateo,

These are not characterized wrt absolute values. The key is that they will be fairly well matched in ratio and over temp, which is more important. Keep in mind the current sources ranges (both 8uA on OUT and 16uA on SENSE) are more important. These will also track one another to keep the Vds comparator input consistent. The 16uA on SENSE affects the actual trip point so matched or not, its variance is the most important item to take into account. Its range in the EC table is 13.6uA to 18uA over temp.

I don't know why the timer threshold ranges are not shown in the DS. Typical upper and lower ranges are there as you note. Similar devices are < +/- 5% and likely the same here. For overall tolernace, safely said +/- 10% would be recommended to use.

The t-fault time is 5us typical (note no capacitive load so this is primarily the de-glitch delay intentionaly put on this device to prevent nuisance trips). The temp tolernace isn't shown. I would recommend +/- 25% for any tolernace use.

Keep in mind the LM5060 is a very simple device, not intended for precision current trip points. It fully relies on system Z to limit current as it is only a circuit breaker timeout and will not provide current or FET SOA protection. In many cases, and output short will result in a failed FET. If full fault protection is required, consider the LM5069.

Brian