R5220x

6

TYPICAL APPLICATION

1

2

3

Lx

GND

4

5

MODE

CE

L 4.7

Load

6

R5220x

Series

Parts Recommendation

10

µF Ceramic Capacitor C2012JB0J106K (TDK)

10

µF Ceramic Capacitor C2012JB0J106K (TDK)

L

4.7

µH VLP5610-4R7(TDK)

External Components

may flow, therefore, those lines should be sufficient and avoid the cross talk with other sensitive lines. Use

• Select an inductor with an inductance range from 4.7µH to 10µH. The internal phase compensation is

enough permissible current and hard to reach magnetic saturation. In terms of inductance value, choose the

appropriate value with considering the conditions of the input voltage range and the output voltage, and

load current. If the inductance value is too small and the load current is large, the peak current of Lx may

reach the Lx current limit, and the protection against over-current may work.

• The protection circuit against over-current is affected by the self-heating and the heat radiation environment.

Therefore evaluate under the considerable environment of the application.

The performance of power source circuits using these ICs extremely depends upon the peripheral circuits.

Pay attention in the selection of the peripheral circuits. In particular, design the peripheral circuits in a way that

the values such as voltage, current, and power of each component, PCB patterns and the IC do not exceed their

respected rated values.