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AN2808 Datasheet(PDF) 18 Page - STMicroelectronics

Part # AN2808
Description  The PM6670S device is a complete
PDF  40 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2808 Datasheet(HTML) 18 Page - STMicroelectronics

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PM6670S evaluation tests
AN2808
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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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