STCC2540 datasheet(17/32 Pages) STMICROELECTRONICS

Part #	STCC2540

Description	USB charging controller with integrated power switch

PDF	32 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 32 page

DocID024711 Rev 6

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STCC2540

Application information

5.8

Input and output capacitors

For proper functionality, the STCC2540 device requires two 1

μF decoupling ceramic

capacitors CIN and COUT (see Figure 4). These capacitors should be placed as close as

possible to the corresponding pins.

The electrolytic capacitor CVBUS (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 VIN supply path is longer than approx. 150 mm, an additional capacitor is required and

should be connected in parallel with the CIN to suppress VIN overvoltage transients caused

by supply path inductance and fast current changes. The minimum value is 10

μF, and a low

ESR type is preferred.

STCC2540 Datasheet(PDF) 17 Page - STMicroelectronics