PM6641 STMicroelectronics, PM6641 Datasheet - Page 18

• Manufacturer Part Number: PM6641
• Description: IC MONO VR DDR2/3 PC VFQFPN-48
• Manufacturer: STMicroelectronics

Specifications of PM6641

• Applications: Converter, DDR2, DDR3
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 3
• Voltage - Output: 0.8 ~ 5.5 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-VFQFN
• Output Voltage: 0.9 V
• Output Current: 3 A
• Input Voltage: 2.7 V to 5.5 V
• Switching Frequency: 1000 KHz
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• For Use With: 497-8425 - KIT EVAL PM6641 CHIPSET/DDR2/3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Block diagram
6
18/47
Block diagram
Table 7.
Figure 27. Functional and block diagram
NTD
HiZ
EN
TD
SGND_1S05
SGND_1S05
COMP_1S05
COMP_1S05
VOUT_1S8
VOUT_1S8
VFB_1S05
VFB_1S05
SET_SWF
SET_SWF
VIN_1S05
VIN_1S05
SW_1S05
SW_1S05
SET_PH1
SET_PH1
PG_1S05
PG_1S05
SS_1S05
SS_1S05
VTTGND
VTTGND
VTTREF
VTTREF
PG_1S8
PG_1S8
VTTFB
VTTFB
LDOIN
LDOIN
VTT
VTT
Legend
Tracking discharge enable
Non-tracking discharge enable
VTTREF buffer enable
LDO high impedance mode enable
V
V
REF
REF
NTD
NTD
_
_
+
+
HiZ
HiZ
V
V
V
V
V
V
REF
REF
CROSS &
CROSS &
_
_
_
_
_
_
_
_
+
+
_
_
+
+
REF
REF
+
+
+
+
+
+
+
+
VALLEY
VALLEY
_
_
CONTROL
CONTROL
REF
REF
ZERO
ZERO
g
g
C.L.
C.L.
-10%
-10%
+10%
+10%
-10%
-10%
m
m
SS
SS
EN
EN
0.9V
0.9V
V
V
REF
REF
1.237V
1.237V
+10%
+10%
V
V
V
V
IMAX
IMAX
IMIN
IMIN
Doc ID 13510 Rev 3
OVP
OVP
UVP
UVP
R
R
ANTI X
ANTI X
EN HiZ
EN HiZ
COND
COND
R
R
CURR.
CURR.
PEAK
PEAK
LIMIT
LIMIT
+
+
_
_
OSC
OSC
CSNS
CSNS
PULSE
PULSE
SKIP
SKIP
V
V
V
V
V
V
0.9V
0.9V
REF
REF
IMIN
IMIN
IMAX
IMAX
ASM
ASM
= 0.8V
= 0.8V
NTD
NTD
? 3
? 3
? 1
? 1
DSCG
DSCG
THERMAL PROTECTION
THERMAL PROTECTION
CONTROL LOGIC
CONTROL LOGIC
VCC
VCC
OVP
OVP
UVP
UVP
AVCC
AVCC
UVLO
UVLO
ASM
ASM
ASM
ASM
? 2
? 2
PULSE
PULSE
PULSE
PULSE
SKIP
SKIP
SKIP
SKIP
CURR.
CURR.
PEAK
PEAK
LIMIT
LIMIT
CURR.
CURR.
TD
TD
PEAK
PEAK
ANTI X
ANTI X
LIMIT
LIMIT
ANTI X
ANTI X
COND
COND
COND
COND
+
+
_
_
NTD
NTD
OVP
OVP
UVP
UVP
V
V
V
V
IMAX
IMAX
IMIN
IMIN
V
V
V
V
+
+
_
_
IMAX
IMAX
IMIN
IMIN
V
V
REF
REF
SS CONTROL
SS CONTROL
CONTROL
CONTROL
V
V
-10%
-10%
CROSS &
CROSS &
CROSS &
CROSS &
VALLEY
VALLEY
VALLEY
VALLEY
REF
REF
ZERO
ZERO
ZERO
ZERO
SS
SS
C.L.
C.L.
C.L.
C.L.
g
g
g
g
+10%
+10%
m
m
m
m
+
+
_
_
+
+
_
_
_
_
+
+
_
_
+
+
V
V
V
V
REF
REF
REF
REF
VIN_1S8
VIN_1S8
VSW_1S8
VSW_1S8
SGND_1S8
SGND_1S8
COMP_1S8
COMP_1S8
VFB_1S8
VFB_1S8
SS_1S8
SS_1S8
VIN_1S5
VIN_1S5
VSW_1S5
VSW_1S5
SGND_1S5
SGND_1S5
COMP_1S5
COMP_1S5
VFB_1S5
VFB_1S5
SS_1S5
SS_1S5
PG_1S5
PG_1S5
PM6641