R5328K(2012) Ver la hoja de datos (PDF) - RICOH Co.,Ltd.

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R5328K
(Rev.:2012)

Low Voltage 3-Mode Dual 150mA LDO

RICOH Co.,Ltd. 

TYPICAL APPLIATION

IN

C1

3 VDD

VOUT1 2

7 ECO1

C2

R5328K Series

8 CE1

VOUT2 4

6 ECO2

C3

5 CE2 GND

1

(External Components)

1.0μF CM05X5R105K06AB

C1005JB0J105K

GRM155B30J105KE18B

(Kyocera)

(TDK)

(Murata)

R5328K

OUT1

OUT2

TECHNICAL NOTES

When using these ICs, consider the following points:

Phase Compensation

In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For

this purpose, use a capacitor C2 and C3 with good frequency characteristics and ESR (Equivalent Series

Resistance).

(Note: If additional ceramic capacitors are connected with parallel to the output pin with an output capacitor for

phase compensation, the operation might be unstable. Because of this, test these ICs with as same external

components as ones to be used on the PCB.)

PCB Layout

Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result.

Connect a capacitor C1 with a capacitance value as much as 1.0μF or more between VDD and GND pin, and as

close as possible to the pins.

Set external components, especially the output capacitor C2 and C3, as close as possible to the ICs, and

make wiring as short as possible.

7

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