lowESR
LowESR refers to capacitors with a minimized equivalent series resistance (ESR). ESR is the internal resistance of a capacitor, and lowering it improves the device’s ability to handle ripple current, reduces voltage drop during transients, and generally enhances efficiency in power conversion circuits. Products marketed as lowESR are often chosen for high-current, high-frequency applications.
ESR is an intrinsic property arising from the capacitor’s construction, including electrodes, electrolyte or dielectric, and
LowESR capacitors are widely used in decoupling and filtering for switching power supplies, voltage regulator modules,
Designers must consider trade-offs. Very low ESR can reduce damping in power converters, potentially causing ringing
When selecting, consult datasheets for ESR vs. frequency, ripple current rating, and voltage rating. Consider the