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LM2679

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SNVS026O – MARCH 2000 – REVISED JUNE 2016

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(1)

No. represents the number of identical capacitor types to be connected in parallel.

(2)

C Code indicates the Capacitor Reference number in Table 1 and Table 2 for identifying the specific component from the manufacturer.

(3)

Assumes worst case maximum input voltage and load current for a given inductance value

(4)

Check voltage rating of capacitors to be greater than application input voltage.

OUTPUT VOLTAGE

(V)

INDUCTANCE (µH)

THROUGH HOLE

SANYO OS-CON

SA SERIES

SANYO MV-GX

SERIES

NICHICON PL

SERIES

PANASONIC HFQ

SERIES

NO.

C CODE

NO.

C CODE

NO.

C CODE

NO.

C CODE

3.3

10

2

C9

2

C8

1

C18

1

C8

15

2

C13

1

C25

1

C16

22

1

C14

1

C24

1

C16

33

1

C14

1

C24

1

C16

5

10

2

C7

2

C8

1

C25

1

C8

15

2

C8

1

C25

1

C8

22

2

C13

1

C25

1

C16

33

1

C14

1

C23

1

C13

47

1

C12

1

C19

1

C11

12

10

2

C10

2

C8

1

C18

1

C8

15

2

C10

2

C8

1

C18

1

C8

22

2

C8

1

C18

1

C8

33

2

C12

1

C24

1

C14

47

1

C14

1

C23

1

C13

68

1

C13

1

C21

1

C15

100

1

C11

1

C22

1

C11

8.2.3 Adjustable Output Design Example

Figure 19. Basic Circuit for Adjustable Output Voltage Applications

8.2.3.1 Detailed Design Procedure

In this example it is desired to convert the voltage from a two battery automotive power supply (voltage range of

20 V to 28 V, typical in large truck applications) to the 14.8-VDC alternator supply typically used to power

electronic equipment from single battery 12-V vehicle systems. The load current required is 3.5 A maximum. It is

also desired to implement the power supply with all surface mount components. Soft start is not required.