PM6652 STMicroelectronics, PM6652 Datasheet - Page 46

• 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

Application ideas
9.2
46/53
Voltage regulation without droop
PM6652 can be suitable also for high current DC/DC conversion requiring high precision
load regulation and no load line function.
Figure 49. No load-line output reference schematic
In
and R32, in order to disable the load-line (or droop) function.
The switching regulator AC behavior is not affected by C60-R32 insertion if the following
design rules are followed:
●
●
●
●
With the modified current sensing filter the output voltage load regulation is almost
independent of the output load, taking full advantage of the differential remote feedback. In
fact Equation 9 now becomes:
Equation 34
Previous result shows that the DC sensed current is zero; as a consequence, the DC output
voltage is given by:
Figure 49
C60<<C15
C15*R31=L1/R
1/(2*
R32 value should fall in the range 1 kΩ
sensing on page 31
π
SVCC
SVCC
* R32*C60)<<fsw
the typical current sensing filter (R31, C15) has been modified by adding C60
C30
C2
1
2
3
4
5
6
7
8
C6
VRTT#
THERM
GSNS
VSNS
CSNS
VOUT
COMP
SVCC
U1
C
DCR
VID6
SNS
VID5
SVCC
PM6652
VID4
−
VID3
V
VID2
OUT
VID1
C8
Doc ID 16867 Rev 3
VID0
=
DPRSLPVR
R10
R
CLKEN#
C9
PHASE
HGATE
thermal
LGATE
PVCC
PGND
COREON
BOOT
DCR
24
23
22
21
20
19
18
17
33
R8
⋅
3V3
DPRSLPVR
R2
i
L
PGOOD
( )
VIN
s
SVCC
÷
⋅
1
10 kΩ, as suggested in
C3
+
1
s
+
⋅
C
R
VIN
R3
R5
sL
+5V
15
DCR
C11
C5
1
⋅
C13
R
4
4
31
Q1
Q3
+
⋅
C
60
1
R
s
32
L1
R31
C60
C15
+
R32
Section 8.7: Current
s
C17
+
CPU VCCIO
PCH CORE
C18
+
PM6652