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L6986H датащи(PDF) 14 Page - STMicroelectronics

номер детали L6986H
подробное описание детали  38 V, 2 A synchronous step-down switching regulator with 30 μA quiescent current
PDF  68 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6986H датащи(HTML) 14 Page - STMicroelectronics

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Figure 6. Soft-start phase with precharged COUT
During normal operation a new soft-start cycle takes place in case of:
•
Thermal shutdown event
•
UVLO event
•
The device is driven in INH mode
The soft-start capacitor is discharged with a 0.6 mA typ. current capability for 1 ms time max. For complete and
proper capacitor discharge in case of fault conditions, a maximum CSS = 67 nF value is suggested.
The application example in Figure 7. Enable the device with external voltage step shows how to enable the
L6986H and perform the soft-start phase driven by an external voltage step.
Figure 7. Enable the device with external voltage step
L6986H
Soft-start and inhibit
DS12905 - Rev 2
page 14/68



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