LV58063MC

PS No.A2120-5/5

Continued from preceding page.

Pin No.

Pin name

Description

Equivalent Circuit

8

SS

Soft start terminal

Internal source current (10

μA) and external

capacitor will make soft start time.

Soft start capacitor, C6 is given by next equation,

C6 = 10

μA ×

Tss

Vref

Where, Tss : soft start time,

Vref : reference voltage

Example : soft start time = 1.2ms

C6 = 10

μA ×

1.2ms

0.8 V = 0.015μF

See FB

Considerations for the design

• Insertion of serial beads in the Schottky diode for removal of noise may cause generation of the negative voltage on SW

pin deviating from the absolute maximum rating at the SW pin, resulting in failure of normal operation. Please, do not

insert beads as above described. Instead, remove noise by Rb resistor.

• Exposed pad on the bottom side of the IC should be soldered. We cannot recommend other usages of the exposed pad.

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