A minimum input ceramic capacitor is required for stability. A minimum output ceramic capacitor is also required for stability, see the Recommended Operating Conditions table for the minimum capacitors values.

The input capacitor counteracts reactive input sources and improves transient response, input ripple, and PSRR. A higher-value input capacitor can be necessary if large, fast rise-time load or line transients are anticipated, or if the device is located several inches from the input power source. Dynamic performance of the device is improved with the use of an output capacitor larger than the minimum value specified in the Recommended Operating Conditions table.

Although a bias capacitor is not required, good design practice is to connect a 0.1-μF ceramic capacitor from BIAS to GND. This capacitor counteracts reactive bias source if the source impedance is not sufficiently low. Place the input, output, and bias capacitors as close as possible to the device to minimize trace parasitics.

If the BIAS source is susceptible to fast voltage drops (for example, a 2-V drop in less than 1 μs) when the LDO load current is near the maximum value, the BIAS voltage drop can cause the output voltage to fall briefly. In such cases, use a BIAS capacitor large enough to slow the voltage ramp rate to less than 0.5 V/μs. For smaller or slower BIAS transients, any output voltage dips must be less than 5% of the nominal voltage.