ZXLD1374

ZXLD1374

Document number: DS35032 Rev. 1 - 2

Page 21 of 35

www.diodes.com

October 2010

© Diodes Incorporated

A Product Line of

Diodes Incorporated

is around 400kHz, the Ideal inductor size is L= 33uH. The same size of inductor can be used if the target frequency is higher

In the case of the Boost topology, the following graphs guide the designer to select the inductor for a target frequency of

400kHz (figure 38) or higher than 500kHz (figure 39).

0

10

20

304050

60

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=22uH

L=33uH

L=47uH

Figure 38: 350mA Boost mode inductor selection for target frequency 400kHz

0

1020

3040

50

60

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=22uH

L=33uH

L=47uH

Figure 39: 350mA Boost mode inductor selection for target frequency > 500kHz