PM6652 datasheet(47/53 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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47 / 53 page

PM6652

Application ideas

Doc ID 16867 Rev 5

47/53

Equation 35

If C60 is used in the current sensing network the IMON function and the average current

limit feature are not available, since the DC sensed current is almost equal to zero (see

Section 8.10.2: Current monitor (IMON) for details).

This application idea has been verified for IMVP7 VCCIO and PCH core supply, 1.05 V rail.

The 1.05 V rail is required to provide up to 16 A, with 8 A load transient in 150 ns. The

following setup has been tested:

●

Output capacitor: 4x330 µF/6 m

Ω + 8x10 µF/X5R

●

Inductor: 0.5 µH/26.9 ARMS/0.86 m

Ω

●

C15=100 nF; C60=3.3 nF; R31=R32=3.3 k

Ω; C30=100 pF; R8=300 kΩ.

The DC and AC performances have been evaluated.

Figure 50.

Load line disabled – VCCIO supply example

The measured output voltage is almost constant in the full load range, with a maximum drift

lower than 0.2 mV.

The output voltage ripple is close to 17 mV peak-to-peak, from 1 A to 16 A output load.

DAC

GND

CORE

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PM6652 Datasheet(PDF) 47 Page - STMicroelectronics