L6717 datasheet(39/56 Pages) STMICROELECTRONICS

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L6717

Output voltage positioning

Doc ID 17326 Rev 1

39/56

until the new code has reached. The output voltage rate of change will be of 12.5 mV /

μsec. = 3.125 mV/μsec.

Figure 11.

PVI mode - on-the-fly VID transitions

●

SVI mode.

As soon as the controller receives a new valid command to set the VID level for one (or

both) of the two sections, the reference of the involved section steps up or down

according to the target-VID with a 3 mV/

μsec. slope (Typ). until the new VID code is

reached.

If a new valid command is issued during the transition, the device updates the target-

VID level and performs the on-the-fly transition up to the new code.

Pre-PWROK Metal-VID OTF-VID are not managed in this case because the Pre-

PWROK Metal VID are stored after EN is asserted.

●

V_FIX mode.

L6717 checks for SVC/SVD modifications and, once the new code is stable, it steps the

reference of both sections up or down according to the target-VID with a 3 mV/

μsec.

slope (Typ). until the new VID code is reached.

OV, UV and PWRGOOD are masked during the transition and re-activated with a 16 clock

cycle delay after the end of the transition to prevent from false triggering.

TOTFVID

x 4 Step VID Transition

VID [0:5]

Int. Reference

Vout

Tsw

4 x 1 Step VID Transition

TVID

OTFVID Clock

Vout Slope Controlled by internal

OTFVID-Clock Oscillator

Vout Slope Controlled by external

driving circuit (TVID)

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