Datasheet
TUSB1211
SLLSE80A –MARCH 2011– REVISED JANUARY 2012
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6 Power Management
This chapter describes the electrical characteristics of the voltage regulators and timing characteristics of
the supplies digitally controlled within the TUSB1211.
6.1 Power Provider
Table 6-1. Summary of Internal Power Providers
(1)
SUPPLY NAME PIN NAME TYPE TYPICAL VOLTAGE (V)
REG1V5 REG1V5 LDO 1.5
REG1V8 - LDO 1.8
REG3V3 REG3V3 LDO 3.1
(1) REG3V3 may be supplied externally, or by shorting the REG3V3 pin to VBAT pin provided VBAT min
is in range [3.2 V : 3.6 V]. Note that the REG3V3 LDO will always power-on when the chip is enabled,
irrespective of whether VDD33 is supplied externally or not.
6.2 Power Consumption
Table 6-2 describes the power consumption depending on the use cases.
Typical power consumption is obtained in nominal operating conditions of TUSB1211.
Table 6-2. Power Consumption
TYPICAL POWER
MODE CONDITIONS SUPPLY UNIT
CONSUMPTION
IV
BAT
8
V
BAT
= 3.6 V, V
DDIO
= 1.8 V,
OFF IV
DDIO
1.8 µA
CS = 0 V
I
TOTAL
9.8
IV
BAT
251
V
BUS
= 5 V, V
BAT
= 3.6 V,
Suspend V
DDIO
= 1.8 V, VCHRG_EN_N = 0 V, IV
DDIO
21 µA
no clock
I
TOTAL
272
IV
BAT
46.4
HS USB V
BAT
= 3.6 V, V
DDIO
= 1.8 V,
IV
DDIO
1.3 mA
Mode active USB transfer
I
TOTAL
47.7
IV
BAT
31.4
FS USB V
BAT
= 3.6 V, V
DDIO
= 1.8 V,
IV
DDIO
1.3 mA
Mode active USB transfer
I
TOTAL
32.7
6.3 Power Control
6.3.1 Overview
TUSB1211 can be powered up in two different modes:
• Standard power-up condition
For this, V
BAT
and V
IO
must be present and chip must be selected (CS=1 and CS_N=0). See 9.3.3.1
Standard Power-up Timing Power resources will be configured sequentially until the device reaches
the power state.
USBON . At this time internal power-on-reset signal PORZ will be released and USB PLL will start up.
Once PLL is locked, the DIR output pin will be deasserted allowing TUSB1211 to be configured by the
USB Link Controller via the ULPI interface.
Note that by default TUSB1211 will be configured as a Host not providing VBUS as required by
14 Power Management Copyright © 2011–2012, Texas Instruments Incorporated
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