ZHCSQQ5D January 2006 – June 2022
PRODUCTION DATA
For stability concerns, an input bypass capacitor (electrolytic, CIN ≥ 47 μF) needs to be located as close as possible to the regulator. For operating temperatures below –25°C, CIN may need to be larger in value. In addition, since most electrolytic capacitors have decreasing capacitances and increasing ESR as temperature drops, adding a ceramic or solid tantalum capacitor in parallel increases the stability in cold temperatures.
To extend the capacitor operating lifetime, the capacitor RMS ripple current rating should be calculated as shown in Equation 1.
where