STPM098C datasheet(76/110 Pages) STMICROELECTRONICS

76 / 110 page

Important:

DVID change is intended to be applied when regulation is in stationary conditions: no other system parameter is

changing during VID transition (VIN, Iload, etc.).

Table 60. VID DAC electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Notes

VID DAC output

VID_DAC_out_range_max

VID DAC output range max

2.5

VID DAC output resolution

VID_DAC_out_dac_res

VID DAC resolution

bits

VID_DAC_out _lsb

VID DAC LSB

1.22

VID DAC output accuracy

VID_DAC_total_err1

VID DAC total error1

0.5 V ≤ VID < 1.5 V

-10

VID_DAC_total_err2

VID DAC total error2

1.5 V ≤ VID < 2.5 V

-1

3.14.4

Load-line function (VDROOP)

For both control loops STPM098C implements a load-line function. This function introduces an intentional voltage

loss (VDROOP) proportional to the load current in order to increase the headroom and recovering part of ESR

during load transients.

Figure 62. Load-line functionality simplified behavior

CPU VID

VSENn

VDROOP

Full Load

Idle Mode

Heavy Load

Light Load

Heavy Load

The load-line function can be enabled through a dedicated PMBus™ command as follows:

STPM098C

Functional description

DS14440 - Rev 1

page 76/110

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