Si3402B-EVB

Rev. 1.1

9

4. BOM Options

The Si3402B non-isolated EVB has been compensated for eight different output voltage and filter combinations:

For the standard ESR capacitor, the ESR increase at very low temperatures may cause a loop stability issue. A

typical evaluation board has been shown to exhibit instability under very heavy loads at –20 °C. Due to

self-heating, this condition is not a great concern. However, using a low ESR filter capacitor solves this problem

(but requires some recompensation of the feedback loop). The low ESR capacitor also improves load transient

response and output ripple.

The Si3402B (non–isolated) EVB was designed with a very simple compensation consisting of R7 and C7.

The standard evaluation board is optimized for a standard ESR filter capacitor for 5 V output.

The following table gives the options that have been tested for other situations.

R6

(To Adjust Output

Voltage)

Filter Cap C5

(Type FM are

Low ESR)

Filter Cap Part

Number

(Panasonic)

R7

C7

3.3 V

4.64 k



1000µF, 6.3V

ECA0JM102

47k



1nF

3.3 V

4.64 k



560 µF, 6.3 V

EEUFM0J561

47 k



1nF

5.0 V

8.66 k



1000µF, 6.3V

ECA0JM102

47k



1nF

5.0 V

8.66 k



560 µF, 6.3 V

EEUFM0J561

47 k



1nF

9.0 V

18.2 k



470 µF, 16 V

ECA1CM471

47 k



1nF

9.0 V

18.2 k



330 µF, 16 V

EEUFM1C331

47 k



1nF

12.0 V

25.5 k



470 µF, 16 V

ECA1CM471

47 k



1nF

12.0 V

25.5 k



330 µF, 16 V

EEUFM1C331

47 k



1nF