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L6983 データシート(PDF) 13 Page - STMicroelectronics

部品番号 L6983
部品情報  38 V, 3 A synchronous step-down converter with 17 μA quiescent current
PDF  63 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6983 データシート(HTML) 13 Page - STMicroelectronics

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Figure 5. Soft-start procedure
During the normal operation, a new soft-start cycle takes place in case of:
1.
Thermal shutdown event
2.
UVLO event
3.
EN pin rising over VEN threshold. Please refer to Table 6. Electrical characteristics
Figure 6. Soft-start phase with IOUT = 2.5 A
6.3
Undervoltage lockout
The device implements the undervoltage lockout (UVLO) continuously sensing the voltage on the VCC pin, if the
UVLO lasts more than 10 μs, the internal logic resets the device by turning off both LS and HS.
After the reset, if the EN pin is still high, the device repeats the soft-start procedure.
L6983
Undervoltage lockout
DS13116 - Rev 2
page 13/63



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