PIFE32251B-R47MS datasheet(45/96 Pages) TI1

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SLP_S0B

VTT

BUCK1 (VNN)

PCH_PWROK

S0iX

BUCK2 (VCCGI)

BUCK3 (VCCRAM)

SLP_S3B

SLP_S4B

3.3 V

1.8 V

1.05 V

0 V

Host sets VR to 0 V through I

0 V

˜ 100 µs

VID

SET VID by Host

˜ 5 ms

TPS65094

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SWCS133C – SEPTEMBER 2015 – REVISED FEBRUARY 2019

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Product Folder Links: TPS65094

Detailed Description

6.3.5.3

Connected Standby Entry and Exit

Figure 6-9. Connected Standby Entry and Exit Sequence

S0 to S0iX (Connected Standby) entry and exit occurs when SLP_S0B is pulled low and high,

respectively. In Connected Standby state, VTT LDO is turned off, but all PGOODs remain asserted.

BUCK1–BUCK3 are not disabled, but instead stop switching while BUCK4–BUCK6 remain in regulation.

SWB1_2 also stays enabled. On entry, BUCK2 and BUCK3 decay to 0 V with their VID registers retaining

the last programmed values to which the BUCKs ramp back up on exit. The host can write to

BUCK2CTRL and BUCK3CTRL registers regardless of the state of the SLP_S0B pin while SLP_S3B and

SLP_S4B are high, which means that BUCK2 and BUCK3 can be changed to ramp to a different voltage

upon exiting S0iX than they had when entering S0iX state. BUCK1 ramps back up to the default value

(1.05 V).

Table 6-11 summarizes status of each VR in Connected Standby state.

Table 6-11. Summary of Rails on Connected Standby Entry and Exit

→ S0IX

S0IX

→ S0

BUCK1 (VNN)

0 V

1.05 V

BUCK2 (VCCGI)

0 V

BUCK3 (VCCRAM)

0 V

1.05 V

BUCK4 (V1P8A)

VID value

BUCK5 (V1P24A)

VID value

BUCK6 (VDDQ)

OTP dependent

VTT LDO (VTT)

OFF

VDDQ / 2

SWB1_2

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