The temperature of the voltage regulator

captzs

The temperature of the voltage regulator [Copy link]

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maychang

Generally, the temperature coefficient of a voltage regulator with a voltage value less than about 5V is negative, and the temperature coefficient of a voltage regulator with a voltage value greater than about 6V is positive. However, whether positive or negative, it is only a few ten-thousandths per degree Celsius, and rarely more than one thousandth per degree Celsius. So the figure on the left is likely to be a software error.

captzs

maychang published on 2020-7-9 20:29 Generally, the temperature coefficient of the voltage regulator tube with a voltage value less than about 5V is negative, and the temperature coefficient of the voltage regulator tube with a voltage value greater than about 6V is positive. However, no matter positive or negative, it is in a few ten-thousandths per camera...

I went to Baidu to look for the answer, but they all talked about when the temperature rises..., but not when it's low temperature... I typed in the keyword "low temperature" and there was a post that talked about a malfunction at -38 degrees, but I couldn't see what it was talking about. So I was confused.

huo_hu

It's a problem with the simulation software. The diode manual usually has a temperature curve, which should be used as the standard

qwqwqw2088

The voltage temperature coefficient of the Zener diode is

captzs

Thank you for your reply! The parameter table of the voltage regulator in the simulation software also lists the influence coefficient of temperature on Is. If such an error occurs in the circuit, it is very wrong.