USB3813 datasheet(18/57 Pages) MICROCHIP

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USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications

Datasheet

DS00001715A-page 18

 2014 Microchip Technology Inc.

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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