LC79451KB datasheet(33/38 Pages) ONSEMI

33 / 38 page

LC79451KB

No.A2223-33/38

10. Instructions

10-1. Recommended Specifications Example of the External Parts

The following shows a recommended specifications example of the external parts.

When charge-pump reference voltage is 2.5V, C01 is unnecessary.

Symbol

Voltage

Capacity value

Voltage rating of capacitor

Note

VDD

1.0

μF

VDD2

1.0

μF

VOUT0

2.5V

1.0

μF

B characteristic

VOUT1

5.0V

1.0

μF

B characteristic

VOUT2

15.0V

0.1

μF

25V

B characteristic

VOUT3

-15.0V

0.1

μF

25V

B characteristic

C01

C01A/B

1.25V

1.0

μF

B characteristic

C11

C11A/B

2.5V

1.0

μF

B characteristic

C21

C21A/B

5.0V

0.1

μF

B characteristic

C22

C22A/B

10.0V

0.1

μF

16V

B characteristic

C31

C31A/B

15.0V

0.1

μF

25V

B characteristic

Notice : These value are recommendation. “Electrical characteristic” of Cf.5 is the value using the

recommendation.

The capacity value, please decide the most suitable value after having evaluated the module.

The external parts are located near this device by wiring as short as possible, because may have an

influence of the characteristic drop by parasitic resistance in the pattern wiring.

VOUT0

LC79451KB

VOUT2

VOUT1

C01

VOUT0

VDD

VOUT1

C01A

C01B

VOUT2

C21

C21A

C21B

C22

C22A

C22B

VOUT3

C31

C31A

C31B

VDD

VSS

C11

C11A

C11B

VDD2

Fig.14. Recommended specifications example of the external part

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