Circuit operation

AN2544

14/17

12 V output load regulation for VIPer12-E and VIPer22A-E is shown in Figure 12.

Figure 12.

Load regulations for 12 V output

Line regulation shown at three different current levels: 100 mA, 200 mA, and 350 mA.

Figure 13.

Line regulation

Ripple

50

0.15

Short circuit

ok

Table 6.

VIPer12ADIP-E, 12 V at 200 mA (continued)

VIPer12 buck 12 V / 200 mA #1

Vin

12 V load

12 V

W in

Efficiency

Load regulation for 12V output

10

11

12

13

14

15

16

17

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

Load

V12 @12V

V22 @ 12V

Line regulation

11

11.2

11.4

11.6

11.8

12

12.2

12.4

12.6

12.8

13

80

130

180

230

Line Voltage

Vout @ 100ma

Vout @ 200ma

Vout @ 350ma