PM6652 datasheet(34/53 Pages) STMICROELECTRONICS

Part #	PM6652

Description	Single-phase controller for Intel MVP 6.5 render voltage regulator,

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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34 / 53 page

Device description

PM6652

34/53

Doc ID 16867 Rev 5

In CPU and VR11 mode the soft-start programmed voltage is VBOOT; the output voltage is

driven to the VIDs programmed voltage value only after TBOOT delay. When the VR11

mode is selected the CLKEN# signal is not used as the output but only as the input pin.

Refer to

Section 8.2 section for details.

Figure 6 and Figure 7 show the different turn-on behavior for GFX mode and CPU/VR11

mode.

When the COREON control pin is pulled down or the shut-down VIDs sequence is selected,

VID[0,...,6]=[1111111], the turn-off sequence is performed. In order to avoid the output

voltage going under ground, the output capacitor is discharged through a dedicated 7

Ω

(typ.) internal discharge MOSFET, connected between the VOUT and SGND pins. When

VOUT voltage is lower than 100 mV the low-side external MOSFET is turned on. See

Figure 18 and Figure 19 for the soft-end waveform details.

Figure 36.

VDAC soft-start voltage slew-rate vs. capacitor value

Figure 34.

IMVP6.5 GFX mode startup

Figure 35.

IMPV6.5 CPU mode startup

PM6652 Datasheet(PDF) 34 Page - STMicroelectronics