STCC5011 Datasheet, PDF (22/37 Pages) STMicroelectronics – Constant current mode overcurrent protection

Application information
STCC5011, STCC5021
5.9
Input and output capacitors
For proper functionality the STCC50x1 device requires 1 μF decoupling ceramic capacitors
C_IN, C_VDD and C_OUT (see Figure 4). These capacitors should be placed as close as
possible to the corresponding pins.
The electrolytic capacitor C_VBUS (see Figure 4) is required by the USB specification to
suppress the voltage and current transients caused by hot plugging/unplugging the
peripheral devices. This capacitor should be placed as close as possible to the USB
connector. The recommended value is 150 μF, low ESR type is preferred.
If the V_IN supply path is longer than approx. 150 mm, an additional capacitor is required to
be connected in parallel to the C_IN to suppress V_IN overvoltage transients caused by supply
path inductance and fast current changes. The minimum value is 10 μF, low ESR type is
preferred.
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