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AN2808 Fiches technique(PDF) 27 Page - STMicroelectronics

No de pièce AN2808
Description  The PM6670S device is a complete
PDF  40 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2808 Fiches technique(HTML) 27 Page - STMicroelectronics

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AN2808
PM6670S evaluation tests
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Figure 31.
UV protection, pulse-skip mode
10.8.2
Latched OV protection
If the output voltage is higher than the 115% nominal value, the over-voltage state is entered
and the low-side MOSFET is turned on. VTT and VTTREF are discharged through their
discharge MOSFETs.
Figure 32.
OV protection, pulse-skip mode
10.9
VTT current limit (foldback)
VTT LDO has a foldback protection feature which reduces the current limit to 1 A when the
VTT output voltage is outside the ±10% optimum power window. The current limit is restored
to 2 A when the output voltage re-enters the optimum power window.



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