RT9644 RICHTEK [Richtek Technology Corporation], RT9644 Datasheet - Page 2

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

RT9644/A
Ordering Information
Pin Configurations
www.richtek.com
2
RT9644/A
DDR_VTT
DDR_VTT
5VSBY
VDDQ
P12V
GND
S3#
1
2
3
4
5
6
7
Package Type
QV : VQFN-28L 6x6 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
Two PWM Controller
One PWM Controller
28
8
cial Standard)
27
9
10
26
RT9644
GND
11
25
24
12
23
13
29
22
14
15
21
20
19
18
17
16
DRIVE4
REFADJ4
DRIVE3
FB3
FB4
COMP
FB
Preliminary
VQFN-28L 6x6
(TOP VIEW)
Note :
RichTek Pb-free and Green products are :
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RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
ments of IPC/JEDEC J-STD-020.
DDR_VTT
DDR_VTT
5VSBY
VDDQ
P12V
GND
S3#
1
2
3
4
5
6
7
28
8
27
9
10
26
RT9644A
GND
11
25
DS9644/A-01 August 2007
24
12
13
23
29
22
14
15
21
20
19
18
17
16
DRIVE3
FB3
PWM4
FB4
COMP4
COMP
FB