Power Supply Tip 18: Regulator Output Voltage Accuracy (see PDF!)

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT

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This ratio can be easily explained in three different situations. The first case assumes that there is no partial pressure, in other words, the output voltage is equal to the reference voltage. Obviously, there is no resistance divider error in this case. The second case assumes that the output voltage is much higher than the reference voltage. In this case, R1 is greater than R2. The voltage divider error is twice the resistance tolerance, resulting in a R1 value that changes in one direction and an R2 value that changes in the other direction. A third easy to explain scenario is to assume that the output voltage is twice the reference voltage. In this case, the rated resistance values ​​are equal. Therefore, if the resistance tolerance changes in the opposite direction, the top of the voltage divider equation changes with the tolerance value, and the denominator becomes zero.