DocID025078 Rev 1

11/28

AN4345

Board testing

28

4.2

Precision of the regulation and output voltage ripple

load conditions, both when 5 V output (obtained through linear regulator) is open loaded and

full loaded. Results are reported on Table 3. The output voltage is not affected by the line

condition and by the IC biasing (external or self-biasing).

No load

25% load

50% load

75% load

100% load

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

90

12.74

12.61

12.14

12.04

12.09

12.02

12.07

11.99

12.05

11.98

115

12.73

12.61

12.14

12.04

12.08

12.01

12.06

11.99

12.04

11.97

150

12.76

12.65

12.14

12.04

12.08

12.01

12.06

11.98

12.04

11.97

180

12.79

12.68

12.15

12.05

12.08

12.00

12.06

11.98

12.04

11.97

230

12.86

12.76

12.16

12.06

12.08

12.00

12.05

11.98

12.04

11.97

265

12.87

12.78

12.17

12.08

12.08

12.00

12.05

11.98

12.04

11.97

No load

25% load

50% load

75% load

100% load

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

External

biasing

Self-

biasing

90

12.01

12.11

12.06

11.98

11.97

12.06

11.97

12.03

11.96

12.01

115

12.00

12.09

12.05

11.98

11.97

12.04

11.96

12.02

11.94

12.00

150

12.00

12.08

12.04

11.97

11.97

12.03

11.95

12.02

11.93

12.00

180

12.00

12.08

12.04

11.97

11.96

12.03

11.95

12.01

11.93

12.00

230

12.00

12.08

12.04

11.98

11.96

12.03

11.95

12.01

11.93

12.00

265

12.00

12.08

12.04

11.98

11.96

12.03

11.95

12.01

11.93

12.00