8.2.2.9 Input Capacitor Selection (LDO)

Although an input capacitor is not required, it is good analog design practice to connect a 0.1μF to 10μF low ESR capacitor across the input supply near the regulator. This capacitor counteracts reactive input sources and improves transient response, stability, and ripple rejection. A higher value capacitor may be needed if large, fast rise-time load transients are anticipated, or if the device is located far from its power source.