L6919C

28/32

Figure 24 shows the mosfets temperature versus output current in steady state condition without any air-flow

or heat sink. It can be observed that the mosfets are under 100ºC in any conditions. Load regulation is also re-

ported from 10A to 45A.

Figure 24. Mosfet Temperature and Load Regulation

DYNAMIC PERFORMANCES

Figure 25 shows the system response to a load transient from 3A to 45A. The output voltage is contained in the

±50mV range. Additional output capacitors can help in reducing the initial voltage spike mainly due to the ESR.

Figure 25. 3A to 45A Load Transient Response

Figure 26 shows the system response to a VID transient from 1.200V to 0.800V and vice versa at minimum load (3A).

Figure 26. Dynamic VID Response

20

30

40

50

60

70

80

90

100

0

5

10

15

20

25

30

35

40

45

Output Current [A]

High-side MOS Q2

High-side MOS Q4

Low -side MOS Q1

Low -side MOS Q3

1.170

1.180

1.190

1.200

1.210

1.220

1.230

1.240

1.250

0

5

10

15

20

25

30

35

40

45

Output Current [A]