RT9644 RICHTEK [Richtek Technology Corporation], RT9644 Datasheet - Page 9

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

Reference Voltage
Reference Voltage V
System Accuracy
VDDQ PWM Controller Error Amplifier
DC Gain Guaranteed By Design
Gain-Bandwidth Product GBWP
Slew Rate SR
Control I/O (S3# and S5#)
Low Level Input Threshold
High Level Input Threshold
PWM Controller Gate Drivers
UGATE and LGATE Source IGATE
UGATE and LGATE Sink IGATE
V
Upper Divider Impedance RU
Lower Divider Impedance RL
VREF_OUT Buffer Source Current
IVREF_OUT
Maximum VTT Load Current
Linear Regulators
DC GAIN Guaranteed By Design
Gain Bandwidth Product GBWP
Slew Rate SR
DRIVEn High Output Voltage
DRIVEn Low Output Voltage
DRIVEn High Output Source Current
DRIVEn Low Output Sink Current
VIDPGOOD
V
V
Protection
OCSET Current Source
DDR_VTT Current Limit
VDDQ OV Level S0/S3
VDDQ UV Level
DDR_VTT OV Level
DS9644/A-01 August 2007
TT
TT_GMCH/CPU
TT_GMCH/CPU
Regulator
Parameter
Rising Threshold
Falling Threshold
REF
R
R
I
I
V
V
V
VTT_MAX
OCS ET
FB
FB
TT
U
L
Symbol
/V
/V
/V
REF
REF
VREF_IN
Preliminary
Periodic load applied with 30%
duty cycle and 10ms period
DRIVEn unloaded
DRIVEn unloaded
S0
S0
By Design
S0/S3
S0/S3
S0
Test Condition
0.725
9.75
Min
2.2
15
12
18
-2
-3
3.3
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0.16
0.74
Typ
-0.8
115
115
0.8
0.8
2.5
2.5
1.2
1.2
0.7
RT9644/A
80
80
10
20
75
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6
6
-
To be continued
www.richtek.com
0.715
Max
0.75
0.4
3.3
22
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2
2
3
Units
MHz
MHz
V/µs
V/µs
mA
mA
mA
dB
k
k
dB
µA
%
%
%
%
V
V
V
A
A
A
V
V
V
V
A
9