RT9644 RICHTEK [Richtek Technology Corporation], RT9644 Datasheet - Page 7

• Manufacturer Part Number: RT9644
• Description: ACPI Regulator/Controller for Dual Channel DDR Memory Systems
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Function Block Diagram
RT9644
RT9644A
DS9644/A-01 August 2007
VIDPGD
REFADJ4
DRIVE3
DRIVE2
VIDPGD
PWM4
DRIVE4
DRIVE3
DRIVE2
FB3
FB2
FB4
FB3
FB2
RT9644A
RT9644
-
+
-
+
-
+
shut_down
-
+
shut_down
-
+
-
+
COMP4
RAMP@
250kHz
shift 90
+
-
GND
+
-
GND
-
+
-
+
Fault
-
+

-
+
Fault
VDDQ
-
+
FB4
+
-
S3#
shut_down
S3#
Thermal
shut_down
Thermal
Preliminary
S5#
S5#
Peripheral Control
OV
UV
P12V
Peripheral Control
OV
UV
P12V
Digital &
Digital &
5VSBY
5VSBY
+
-
+
-
+
-
+
-
VREE_OUT
VREE_OUT
OC
FB
OC
FB
-
+
RAMP@
250kHz
-
+
RAMP@
250kHz
+
-
COMP
+
-
DDR_VTTSNS
COMP
20uA
DDR_VTTSNS
20uA
-
+
-
+
+
-
+
-
-
+
-
+
+
-
+
-
+
-
+
-
5VSBY
5VSBY
RT9644/A
BOOT
UGATE
PHASE
LGATE
OCSET
DDR_VTT
VDDQ
VREF_IN
BOOT
UGATE
PHASE
LGATE
OCSET
DDR_VTT
VDDQ
VREF_IN
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