LAN9252SLASHML datasheet(309/329 Pages) MICROCHIP

309 / 329 page

 2015 Microchip Technology Inc.

DS00001909A-page 309

LAN9252

18.4

Current Consumption and Power Consumption

This section details the device’s typical supply current consumption and power dissipation for 100BASE-TX and power

management modes of operation with the internal regulator enabled and disabled.

18.4.1

INTERNAL REGULATOR DISABLED

Note 5:

VDD33TXRX1, VDD33TXRX2, VDD33BIAS, VDD33, VDDIO

Note 6:

VDD12TX1, VDD12TX2, OSCVDD12, VDDCR

Note 7:

Current measurements do not include power applied to the magnetics or the optional external LEDs.

Note 8:

The Ethernet component current is independent of the supply rail voltage (2.5V or 3.3V) of the transformer.

Two copper TP operation is assumed. Current is half if one PHY is using 100BASE-FX mode. Current is

zero if both PHYs are using 100BASE-FX mode.

Note 9:

This includes the power dissipated by the transmitter by way of the current through the transformer.

Note 10:

3.3*(A) + 1.2*(B) + (2.5)*(C) @ Typ

Note 11:

3.3*(A) + 1.2*(B) + (3.3)*(C) @ Typ

TABLE 18-4:

CURRENT CONSUMPTION AND POWER DISSIPATION (REGS. DISABLED)

3.3 V

Device

Current

(mA)

(A)

Note 5,

Note 7

1.2 V

Device

Current

(mA)

(B)

Note 6,

Note 7

Magnetics

Current

(mA)

(C)

Note 8

Device

Power

with 2.5 V

Magnetics

(mW)

Note 9,

Note 10

Device

Power

with 3.3 V

Magnetics

(mW)

Note 9,

Note 11

Reset (RST#)

Typ.

23.6

28.3

0.0

112

D0, 100BASE-TX

with Traffic

Typ.

58.7

51.0

82.0

461

526

D0, 100BASE-TX

Idle

Typ.

63.4

49.9

82.0

475

540

D0, PHY Energy Detect

Power Down (both PHYs)

Typ.

7.9

30.8

0.0

D0, PHY General

Power Down (both PHYs)

Typ.

1.5

30.6

0.0

D1, 100BASE-TX

Idle

Typ.

63.4

37.5

82.0

460

525

D1, PHY Energy Detect

Power Down (both PHYs)

Typ.

7.8

17.6

0.0

D1, PHY General

Power Down (both PHYs)

Typ.

1.5

17.7

0.0

D2, 100BASE-TX

Idle

Typ.

63.4

37.5

82.0

460

525

D2, PHY Energy Detect

Power Down (both PHYs)

Typ.

7.8

6.3

0.0

D2, PHY General

Power Down (both PHYs)

Typ.

1.5

6.1

0.0

D3, PHY General

Power Down (both PHYs)

Typ.

1.5

2.7

0.0

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