Although an input capacitor is not required for stability, good analog design practice is to connect a 0.1μF to 1μF, low ESR capacitor across the input supply near the regulator. This capacitor counteracts reactive input sources and improves transient response, noise rejection, and ripple rejection. A higher-value capacitor is necessary if large, fast rise-time load transients are anticipated or the device is located several inches from the power source.

The TPS732 does not require an output capacitor for stability and has maximum phase margin with no capacitor. The device is designed to be stable for all available types and values of capacitors. In applications where multiple low ESR capacitors are in parallel, ringing potentially occurs when the product of C_OUT and total ESR drops below 50nF × Ω. Total ESR includes all parasitic resistances, including capacitor ESR and board, socket, and solder joint resistance. In most applications, the sum of capacitor ESR and trace resistance meets this requirement.