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QD48S018033 DC-DC Converter Data Sheet
36-75 VDC Input; 1.8 – 3.3 VDC @ 15A Output
Fig. 24: Output voltage response to Iout1 load current step-
change of 3.75 A (50%-75%-50%) at Iout2 = 7.5 A and Vin =
48 V. Ch1 = Vout1 (50 mV/div), Ch2 = Vout2 (50 mV/div), Ch3
= Iout1 (10 A/div.), Ch4 = Iout2 (10 A/div.). Current slew rate:
0.1 A/ μ s, Co = 10 μ F tantalum + 1 μ F ceramic. Time scale: 0.5
ms/div.
Fig. 26: Output voltage response to Iout1 load current step-
change of 3.75 A (50%-75%-50%) at Iout2 = 7.5 A and Vin =
48 V. Ch1 = Vout1 (100 mV/div), Ch2 = Vout2 (100 mV/div),
Ch3 = Iout1 (10 A/div.), Ch4 = Iout2 (10 A/div.). Current slew
rate: 5 A/ μ s, Co = 300 μ F tantalum + 1 μ F ceramic. Time scale:
0.5 ms/div.
Fig. 25: Output voltage response to Iout2 load current step-
change of 3.75 A (50%-75%-50%) at Iout1 = 7.5 A and Vin =
48 V. Ch1 = Vout1 (50 mV/div), Ch2 = Vout2 (50 mV/div), Ch3
= Iout1 (10 A/div.), Ch4 = Iout2 (10 A/div.). Current slew rate:
0.1 A/ μ s, Co = 10 μ F tantalum + 1 μ F ceramic. Time scale: 0.5
ms/div.
Fig. 27: Output voltage response to Iout2 load current step-
change of 3.75 A (50%-75%-50%) at Iout1 = 7.5 A and Vin =
48 V. Ch1 = Vout1 (100 mV/div), Ch2 = Vout2 (100 mV/div),
Ch3 = Iout1 (10 A/div.), Ch4 = Iout2 (10 A/div.). Current slew
rate: 5 A/ μ s, Co = 300 μ F tantalum + 1 μ F ceramic. Time scale:
0.5 ms/div.
NOV 11, 2003 revised to NOV 20, 2006
Page 13 of 16
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