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AN2808 データシート(PDF) 18 Page - STMicroelectronics |
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AN2808 データシート(HTML) 18 Page - STMicroelectronics |
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18 / 40 page ![]() PM6670S evaluation tests AN2808 18/40 10 PM6670S evaluation tests 10.1 Turning on VDDQ, VTT and VTTREF (soft-start) The VDDQ soft-start is divided into four steps. In each step, the current limit is increased by ¼ of the nominal value, as shown in Figure 15. VTT and VTTREF soft-starts are performed at their maximum available current. Figure 15. VDDQ soft-start at 150 m Ω load, pulse-skip mode Figure 16. VDDQ turn-on (S5), pulse-skip mode |
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