STMPS2242 datasheet(35/42 Pages) STMICROELECTRONICS

35 / 42 page

STMPS2242, STMPS2252, STMPS2262, STMPS2272

Application information

Doc ID 15050 Rev 3

35/42

Application information

7.1

Input and output capacitors

Input and output capacitors improve the performance of the device; the actual capacitance

should be optimized for the particular application. For all applications, a 0.1 µF or greater

ceramic bypass capacitor between IN and GND as close to the device as possible is

recommended for local noise decoupling. This precaution also reduces ringing on the input

due to power supply transients.

An additional capacitor may be needed on the input to reduce input voltage overshoots from

exceeding the absolute maximum voltage of the device during heavy transient conditions.

This is especially important during bench testing when long, inductive cables are used to

connect the evaluation board to the bench power supply. The value of 100 µF may be

adequate in most situations.

An output capacitor is not required for device functionality, but placing a high-value (in the

order of 10 - 100 µF) electrolytic capacitor on the output pins is recommended when large

transient currents are expected on the output.

STMPS2242 数据表(PDF) 35 Page - STMicroelectronics