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AN2787 데이터시트(PDF) 33 Page - STMicroelectronics

부품명 AN2787
상세설명  Monolithic VR demonstration board for chipset
PDF  37 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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AN2787 데이터시트(HTML) 33 Page - STMicroelectronics

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AN2787
STEVAL-ISA050V1 evaluation tests
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10.8
SW regulators current limit
Cycle-by-cycle the high-side MOSFET current is monitored and if it's higher than the
programmed current limit, the high-side MOSFET is immediately turned off.
Figure 38.
1.5 V rail output voltage, 1.5 V inductor current and output current, peak
current limit reached
10.9
Soft-end
Each SW regulator, when turned off, performs the output voltage soft-end by turning off the
power MOSFET and turning on the discharge MOSFET. When the output voltage is lower
than about 300 mV, the low-side power MOSFET is turned on. VTTREF and VTT can track
half of VDDQ also during the soft off.
These rails are allowed two different modes of discharge: tracking and nontracking
discharge.



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