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L6920DB Datasheet(PDF) 8 Page - STMicroelectronics

Part # L6920DB
Description  Synchronous rectifier step up converter
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6920DB Datasheet(HTML) 8 Page - STMicroelectronics

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L6920DB
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So, in case of light load, the device works in PFM mode, as shown in Figure 8:
Figure 6.
PFM mode condition: Vout = 5V; Vbatt =1.5V ; C2 = Vout ; C3 = Inductor
Current
Figure 7 shows how the device works in case of heavy load.
Figure 7.
Heavy load conditions C2 = Vout; C3 = Inductor Current; Vout = 5V;
Vbatt=1.5V


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