PM6652 STMicroelectronics, PM6652 Datasheet - Page 38

• 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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the external MOSFET or the inductor, allows the controller monitoring the thermal status of
the power components (see
In application where this function is not required (in render core supply, for example) the
THERM pin must be connected to 5 V and VRTT# can be left floating.
Figure 40. Voltage regulator thermal throttling
Overvoltage protection
The PM6652 can detect two kinds of VOUT overvoltage:
●
●
Both overvoltage protections are latched, so a COREON or SVCC toggle is required in
order to restart the device.
If the fixed overvoltage threshold is reached, the high-side MOSFET is immediately turned-
off and the output capacitor is sharply discharged by turning-on the low-side MOSFET. This
fault protection is always active.
When a variable V
MOSFETs are turned-off and the output capacitor soft-discharge is performed. The internal
discharge MOSFET is turned-on until VOUT is lower than about 100 mV, then the low-side
MOSFET is turned-on (see
VID transitions and, during soft-start, until the power good signal is released.
Undervoltage protection
If the switching voltage regulator output falls below -300 mV, referred to VDAC programmed
voltage, the latched under voltage fault is detected and the output capacitor soft-discharge is
performed. The internal discharge MOSFET is turned-on until VCC_GFX is lower than
about 100 mV, then the low-side MOSFET is turned-on (see
fault detection is masked during VID transitions and, during soft-start, until the power good
signal is released.
The under voltage protection can't be detected if the programmed VDAC voltage is lower
than 300 mV.
Fixed 1.55 V overvoltage threshold;
Variable +200 mV overvoltage threshold, referred to VDAC reference voltage.
OUT
overvoltage is detected, both high-side and low-side external
Figure 20 on page 22
Figure 40
Doc ID 16867 Rev 3
).
). This fault detection is masked during
Figure 21 on page 22
). This
PM6652