TYPICAL OPERATING WAVEFORMS
V in =12V, V o1 =2.5V, V o2 =1.8V, I o1 =0-20A, I o2 =0-20A Fs=350 kHz, 45 ° C, 200LFM Air Flow
91.0
90.8
90.6
90.4
90.2
90.0
89.8
89.6
89.4
89.2
89.0
88.8
88.6
88.4
88.2
88.0
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Output Current (Amps)
Fig. 38: Efficiency of 2.5V channel versus load current with 200LFM air flow and heat sink at
45 ° C.
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Output Current (Amps)
Fig.39: Power loss of 2.5V channel versus load current with 200LFM air flow and heat sink at
45 ° C.
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RD-0621
20
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