STEVAL-ISA051V2 STMicroelectronics, STEVAL-ISA051V2 Datasheet - Page 37

• Manufacturer Part Number: STEVAL-ISA051V2
• Description: BOARD EVAL PM6670AS DDR2/3
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA051V2

• Design Resources: STEVAL-ISA051V2 Gerber Files STEVAL-ISA051V2 Schematic STEVAL-ISA051V2 Bill of Material
• Main Purpose: Special Purpose DC/DC, DDR Memory Supply
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 1.5V, 1.8V
• Voltage - Input: 4.5 ~ 36V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6670A
• Input Voltage: 4.5 V to 36 V
• Output Voltage: 1.8 V, 1.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: PM6670AS
• Kit Application Type: Power Management
• Application Sub Type: DDR2/3 Memory Power Supply Controller
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: PM6670AS
• Other names: 497-8412

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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