L6919C

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Figure 28 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 105°C in any conditions. Load regulation is also re-

ported from 10A to 55A.

Figure 28. Mosfet Temperature and Load Regulation.

Figure 29 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 29. 3A to 45A Load Transient Response

Figure 30 shows the system response to a VID transient from 1.200V to 0.800V and vice versa at minimum load (3A).

Figure 30. Dynamic VID Response

25

35

45

55

65

75

85

95

105

115

0

5

10 15 20 25 30 35 40 45 50 55 60

Output Current [A]

High-s ide MOS Q2

High-s ide MOS Q4

Low-s ide MOS Q1

Low-s ide MOS Q3

1.155

1.165

1.175

1.185

1.195

1.205

1.215

1.225

1.235

0

5 10 15 20 25 30 35 40 45 50 55 60

Output Curre nt [A]