USB5926CSLASHKD datasheet(51/66 Pages) MICROCHIP

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2022 Microchip Technology Inc. and its subsidiaries

DS00003190C-page 49

USB5926C

10.4 Power Consumption

The values shown below represent typical power consumption as measured during various modes of operation. Power

dissipation is determined by temperature, supply voltage, and external source/sink requirements.

The following measurements were taken with

VDD33 equal to 3.3V, VDD12 equal to 1.2V, at an ambient temperature

of 25

°C.

Note:

Actual power consumption will vary depending on the capabilities of the USB host, the devices connected,

data type, and data bus utilization. The published data represents typical power consumption of the hub at

nominal ambient temperature and supply voltage while large file transfers are active between USB host and

USB Mass Storage class devices on all downstream ports.

Typical power consumption for specific use cases can be estimated using the formulas below:

IVDD33(mA) = 35 + (NPORTSFS)(1)* +(NPORTSHS)(10) + (NPORTSSS)(7)

IVDD12(mA) = 245+ (NPORTSFS)(0.1)* +(NPORTSHS)(2) + (NPORTSSS)(109)

PTOTAL(mW) = 409.5+ (NPORTSFS)(3.42)* +(NPORTSHS)(35.4) + (NPORTSSS)(153.9)

10.5 DC Specifications

Note:

A USB 3.x hub operates both the USB 3.x and USB 2.0 interfaces in parallel on it’s upstream port connec-

tion. A port operating under the SS/HS condition indicates that a USB 3.x hub was connected to it.

TABLE 10-3: DEVICE POWER CONSUMPTION

Typical (mA)

Typical Power

VDD33

VDD12

(mW)

Reset

1.0

10.5

No VBUS

4.0

8.0

Global Suspend

4.0

8.0

4 SS Ports + 2 HS Port

685

1,096

4 SS/HS Ports/2 HS Port

123

693

1,238

TABLE 10-4: I/O DC ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Min

Typical

Max

Units

Notes

I Type Input Buffer

Low Input Level

High Input Level

VIL

VIH

2.1

0.9

IS Type Input Buffer

Low Input Level

High Input Level

Schmitt Trigger Hysteresis

(VIHT - VILT)

VIL

VIH

VHYS

1.9

0.9

O6 Type Output Buffer

Low Output Level

High Output Level

VOL

VOH

VDD33-0.4

0.4

IOL = 6 mA

IOH = -6 mA

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