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AN2787 Datasheet(PDF) 30 Page - STMicroelectronics

Part # AN2787
Description  Monolithic VR demonstration board for chipset
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2787 Datasheet(HTML) 30 Page - STMicroelectronics

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STEVAL-ISA050V1 evaluation tests
AN2787
30/37
Figure 33.
SW regulators phases, no phase shift - synchronous clock, SETPH1 pin
tied to AVCC
10.7
Fault management (OVP, UVP, UVLO, thermal)
Each switching regulator is able to detect the output overvoltage and undervoltage. When
the OV is detected the high-side MOSFET is turned off and the low-side MOSFET is turned
on. When the UV is detected, the power MOSFETs are both turned off and the discharge
MOSFET is turned on (soft-end). The soft-end is also performed when the junction
temperature is higher than 150 °C.
Figure 34.
VDDQ, VTT, VTTREF output voltage, VDDQ temporarily shorted to 3.3 V,
output overvoltage protection triggered



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