TLK105 datasheet(76/99 Pages) TI

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TLK105

TLK106

SLLSEB8A – AUGUST 2012 – REVISED MARCH 2013

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9.5

POWER SUPPLY CHARACTERISTICS

The data was measured using a TLK10x evaluation board. The current from each of the power supplies is

measured and the power dissipation is computed. For the single 3.3V external supply case the power dissipation

across the internal linear regulator is also included. All the power dissipation numbers are measured at the

nominal power supply and typical temperature of 25°C. The power needed is given both for the device only, and

including the center tap of the transformer for a total system power requirement. The center tap of the

transformer is normally connected to the 3.3V supply, thus the current needed may also be easily calculated.

9.5.1

Active Power

PARAMETER

TEST CONDITIONS

FROM POWER PINS

FROM

UNIT

TRANSFORMER

CENTER TAP

100Base-TX /W Traffic (full packet 1518B

Single 3.3V external supply

203

rate)

10Base-T /W Traffic (full packet 1518B rate)

Single 3.3V external supply

211

9.5.2

Power-Down Power

PARAMETER

TEST CONDITIONS(1)

FROM THE POWER SUPPLIES

FROM TRANSFORMER

UNIT

CENTER TAP

IEEE PWDN

Single 3.3V external supply

Passive Sleep Mode

Single 3.3V external supply

Active Sleep Mode

Single 3.3V external supply

(1)

Measured under typical conditions.

Electrical Specifications

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