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USB3813 Datasheet(PDF) 18 Page - SMSC Corporation |
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USB3813 Datasheet(HTML) 18 Page - SMSC Corporation |
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18 / 68 page  USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications Datasheet Revision 1.0 (06-17-13) 18 SMSC USB3813 DATASHEET 4.2.2.2 3.3V + 1.8V VBAT must be tied to the 3.3V system supply. VDDCOREREG must be tied to the 1.8V system supply. In this configuration the 3.3V regulator will operate in dropout mode and the 1.2V regulator will be active. 4.3 Power Connection Diagrams Figure 4.1 illustrates the power connections for the USB3813 with various power supply configurations. Figure 4.1 Power Connections HSIC 3.3V Regulator (IN) (OUT) VBAT VBAT/+3.3V Supply 1.2V Core Logic 3.3V I/O USB3813 Single Supply Application 1.2V Regulator (IN) (OUT) 3.3V Internal Logic VDD33 1.0uF VDDCOREREG VDDCR12 1.0uF HSIC 3.3V Regulator (IN) (OUT) VBAT +3.3V Supply 1.2V Core Logic 3.3V I/O USB3813 Dual Supply Application (3.3V & 1.8V) 1.2V Regulator (IN) (OUT) 3.3V Internal Logic VDD33 1.0uF VDDCOREREG VDDCR12 1.0uF +1.8V Supply GND 4.7uF GND 4.7uF |
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