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AN2829 Datasheet(PDF) 19 Page - STMicroelectronics

Part # AN2829
Description  Dual step-down controller with auxilary voltages
PDF  32 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2829 Datasheet(HTML) 19 Page - STMicroelectronics

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AN2829
Test setup and performance summary
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Figure 8.
REF, LDO5 and LDO power-up
11.3
Soft-start and shutdown waveforms
Figure 9, 10, 11 and 12 show, respectively, the soft-start and shutdown waveforms.
The PM681A has an independent internal digital soft-start for each switching section.
During the soft-start phase the internal current limit increases from 25% to 100% with steps
of 25% to avoid the inductor current rising abruptly.
AM01414v1



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