PM6652 STMicroelectronics, PM6652 Datasheet - Page 30

• Manufacturer Part Number: PM6652
• Description: IC CTLR STEPDOWN SMPS 32VFQFPN
• Manufacturer: STMicroelectronics

Specifications of PM6652

• Applications: Controller, Intel IMVP-6.5™, VR11
• Voltage - Input: 4.5 V ~ 36 V
• Number Of Outputs: 1
• Voltage - Output: 0.3 V ~ 1.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device description
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Figure 27. GFX supply - VID step, skip mode
Figure 26. PM6652 droop function
Voltage dynamic (VID) transitions
The integrated 7 bit digital-to-analog converter (DAC) can change its output voltage, with
12.5 mV step, following
converter starts an internal bit rolling in order to ramp-up (or ramp-down) the VDAC output
with a minimum voltage slew-rate as declared in
for a blanking time (typ.30 µs) after the transition, the under voltage and the variable over
voltage protections are disabled.
Given the previously described control loop, the switching regulator output always tracks the
VDAC reference, with the same voltage slew-rate.
In GFX render IMVP6.5 mode, if the DPRSLPVR control signal is asserted (DPRSLPVR =
SVCC) the render suspend state is entered, enabling the pulse-skipping control mode. This
high efficiency algorithm allows the low-side MOSFET turning off when the inductor's
current is zero; so doing the switching frequency becomes fully load-dependent, ensuring a
Table 6 on page 16
Doc ID 16867 Rev 3
Figure 28. CPU IMVP6.5 - VID step, skip mode
and
Table 7 on page 18
Table 8 on page 28
. After a VID change, the
. During this time and
PM6652