ZHCSSL3R April 2000 – February 2025 LP2980-N
PRODUCTION DATA
The legacy chip version of the LP2980-N requires an output capacitor to maintain regulator loop stability. Select this capacitor to meet the requirements of minimum capacitance and equivalent series resistance (ESR) range. Because the acceptable capacitance and ESR ranges are wider than for most other LDOs, finding capacitors that meet the stability criteria of the LP2980-N is not difficult. Dynamic device performance also improves by using an output capacitor.
In general, make sure the capacitor value is at least 1μF (over the actual ambient operating temperature), and the ESR is within the range indicated in Figure 5-41, Figure 5-42, and Figure 5-43. Although a maximum ESR is given in these figures, capacitors generally do not support such high ESR values.