TUSB9260

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SLLS962A – DECEMBER 2009 – REVISED JULY 2010

8

POWER CONSUMPTION

Current numbers were taken on a typical ZAW device. All transfers are to a SATA Gen II SSD. A SATA

Gen I target yields an approximate 10-mA power savings on the 1.1-V rail.

Table 8-1. SuperSpeed USB Power Consumption

TYPICAL IDLE CURRENT

POWER RAIL

319

308

58

58

6

6

(1)

Transferring data via SS USB to a SSD SATA Gen II device. No SATA power management, U0 only.

(2)

SATA Gen II SSD attached no active transfer. No SATA power management, U0 only.

(3)

All 1.1-V power rails connected together.

(4)

All 1.8-V power rails connected together.

(5)

All 3.3-V power rails connected together.

Table 8-2. High Speed USB Power Consumption

TYPICAL IDLE CURRENT

POWER RAIL

197

193

45

36

14

14

(1)

Transferring data via HS USB to a SSD SATA Gen II device. No SATA power management.

(2)

SATA Gen II SSD attached no active transfer. No SATA power management.

(3)

All 1.1-V power rails connected together.

(4)

All 1.8-V power rails connected together.

(5)

All 3.3-V power rails connected together.

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POWER CONSUMPTION

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