9.2.2.1 Input Capacitor (C_IN)

To limit the voltage drop on the input supply caused by transient in-rush currents when the switch turns on into a discharged load capacitor or short-circuit, a capacitor must be placed between VIN and GND. A 1 µF ceramic capacitor, C_IN, placed close to the pins, is usually sufficient. Higher values of C_IN can be used to further reduce the voltage drop during high-current application. When switching heavy loads, it is recommended to have an input capacitor about 10 times higher than the output capacitor to avoid excessive voltage drop.