PM6670ASTR STMicroelectronics, PM6670ASTR Datasheet - Page 37

• Manufacturer Part Number: PM6670ASTR
• Description: IC CTLR DDR2/3 MEM PS 24VFQFPN
• Manufacturer: STMicroelectronics

Specifications of PM6670ASTR

• Applications: Memory, DDR2/DDR3 Regulator
• Current - Supply: 800µA
• Voltage - Supply: 4.5 V ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-VFQFN, 24-VFQFPN
• For Use With: 497-8412 - BOARD EVAL PM6670AS DDR2/3497-8411 - BOARD EVAL PM6670S DDR2/3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6305-2; PM6670ATR

PM6670AS
7.3
S3 and S5 power management pins
According to DDR2/3 memories supply requirements, the PM6670AS can manage all S0 to
S5 system states by connecting S3-S5 pins to their respective sleep-mode signals in the
notebook's motherboard.
Keeping S3 and S5 high, the S0 (Full-On) state is decoded and the outputs are alive.
In S3 state (S5 = 1, S3 = 0), the PM6670AS maintains VDDQ and VTTREF outputs active
and VTT output in high-impedance as needed.
In S4/S5 states (S5 = S3 = 0) all outputs are turned off and, according to DSCG pin voltage,
the proper soft-end is performed.
Table 11.
S3
1
0
0
S5
1
1
0
S3 and S5 Sleep-states decoding
S4/S5 (Suspend-To-Disk)
S3 (Suspend-To-RAM)
System State
S0 (Full-On)
Doc ID 14436 Rev 2
Off (Discharge)
VDDQ
On
On
Off (Discharge)
VTTREF
On
On
Device description
Off (Discharge)
Off (Hi-Z)
VTT
On
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