FAN5362 データシートの表示（PDF） - Fairchild Semiconductor

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FAN5362

3MHz, 500mA / 750mA Synchronous Buck Regulator

Fairchild Semiconductor 

PCB Layout Guidelines

There are only three external components: the inductor, input

capacitor, and the output capacitor. For any buck switcher IC,

including the FAN5362, it is important to place a low-ESR

input capacitor very close to the IC, as shown in Figure 25.

The input capacitor ensures good input decoupling, which

helps reduce noise appearing at the output terminals and

ensures that the control sections of the IC do not behave

erratically due to excessive noise. This reduces switching

cycle jitter and ensures good overall performance. It is

important to place the common GND of CIN and COUT as

close as possible to the C2 terminal. There is some flexibility

in moving the inductor further away from the IC; in that case,

VOUT should be considered at the COUT terminal.

A1 A2

B1 B2

C1 C2

0603

COUT

Figure 25. PCB Layout Recommendation

© 2009 Fairchild Semiconductor Corporation

FAN5362 • Rev. 1.0.1

11

www.fairchildsemi.com

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