sˈɪns vˈoʊltɪdʒ dɹˈɑːps ɑːɹ tˈɪpɪkli lˈɛs ðɐn tˈɛn pɚsˈɛnt ʌvðə pˈaʊɚ səplˈaɪ vˈoʊltɪdʒ, ðɪ ˈɛɹɚɹ ɪŋkˈɜːd baɪ ɪɡnˈoːɹɪŋ ðɪ ˌɪntɚɹˈækʃən bᵻtwˌiːn ðə dɪvˈaɪs kˈɜːɹənts ænd ðə səplˈaɪ vˈoʊltɪdʒ ɪz smˈɔːl.
Since voltage drops are typically less than 10% of the power supply voltage, the error incurred by ignoring the interaction between the device currents and the supply voltage is small.