L6717ATR datasheet(40/57 Pages) STMICROELECTRONICS

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Output voltage positioning

L6717A

40/57

DocID024465 Rev 1

Figure 12. 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 7 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.

L6717A 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

7 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.

OTFVID

x 4 Step VID Transition

VID [0:5]

Int. Reference

out

4 x 1 Step VID Transition

VID

OTFVID Clock

Vout Slope Controlled by internal

OTFVID-Clock Oscillator

Vout Slope Controlled by external

driving circuit (TVID)

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