DS9401C 03

RT9401C
6Bit VID Reference Generator
General Description
Features
The RT9401C is digital to analog converter which generates
a reference voltage for Intel VR10.x 6-bit VID code
z
Support 6bit DAC Voltage Conforming to Intel
VRD10.x VID Table
respectively. The part is proposed to pair with a series of
Richtek’ s general purpose PWM controllers dedicated
for the desktop microprocessor core power voltage
regulation. The reference voltage is within 1% high
accuracy.
z
1% High Accuracy of VREF
RoHS Compliant and 100% Lead (Pb)-Free
RT9401C
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Applications
z
z
Desktop/Motherboard Microprocessor Core Power
Regulation
High Accuracy and Programmable Voltage Power
Regulation
Pin Configurations
(TOP VIEW)
Note :
`
`
8
VID1
Richtek products are :
VID2
2
RoHS compliant and compatible with the current require-
VID3
3
ments of IPC/JEDEC J-STD-020.
VID4
4
VID125
Ordering Information
z
9
VDA
7
VDD
6
VID0
5
GND
Suitable for use in SnPb or Pb-free soldering processes.
SOP-8 (Exposed Pad)
Marking Information
Typical Application Circuit
RT9401C
1
2
3
4
VID1
VID2
VDA
VID125
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
VDD
8
C1
7
5V
C2
VID3
VID0
VID4
GND
6
5
VTT
DS9401C-03 April 2011
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1
RT9401C
Function Block Diagram
VDD
VID125
VID4
VID3
VID
Input
VID2
MUX
VID1
+
-
VDA
VID0
VREF
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
VID1
DAC Voltage Identification Inputs.
2
VID2
DAC Voltage Identification Inputs.
3
VID3
DAC Voltage Identification Inputs.
4
VID4
DAC Voltage Identification Inputs.
5
GND
Ground.
6
VID0
DAC Voltage Identification Inputs.
7
VDD
Power Input Pin.
8
VDA
Digital - to - Analog Voltage Output.
Exposed Pad (9) VID125
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2
DAC Voltage Identification Inputs.
DS9401C-03 April 2011
RT9401C
Absolute Maximum Ratings
z
z
z
z
z
z
(Note 1)
Supply Input Voltage, VDD ------------------------------------------------------------------------------------------- 7V
Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) ----------------------------------------------------------------------------------------------- 1.1W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA ------------------------------------------------------------------------------------------ 86°C/W
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C
Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
z
z
(Note 4)
Supply Input Voltage, VDD ------------------------------------------------------------------------------------------- 5V ±10%
Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C
Electrical Characteristics
(VDD = 5V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
--
2
5
mA
VDA ≥ 1V
-1
--
+1
%
VDA < 1V
-10
--
+10
mV
VID(4:0) &VID125 Input Low
--
--
0.4
V
VID(4:0) &VID125 Input High
1.05
--
--
V
18
--
--
μA
When select AMD CPU
2.2
2.4
2.5
V
When select Intel CPU
1
1.1
1.2
V
Capacitor Load Only
--
70
--
dB
VDD Supply Current
Nominal Supply Current
IDD
VDA open
Referen ce & DAC
Output Voltage Program
See Table 1
DAC Output Voltage Accuracy
VID[4:0] Internal Pull-High Current
Source Capability
VID[4:0] Internal Pull-High Voltage
Output Buffer
DC Gain
Bandwidth
GBW
CL=1nF
--
1.64
--
MHz
Slew Rate
SR
CL=0.1uF
--
9.5
--
mV/μs
Impedance
ROUT
60
--
110
Ω
DS9401C-03 April 2011
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3
RT9401C
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. θJA is measured in the natural convection at T A = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 3. Devices are ESD sensitive. Handling precaution recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
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DS9401C-03 April 2011
RT9401C
Table 1. Output Voltage Program (VR 10)
Pin Name
Nominal Output Voltage DACOUT
VID4
VID3
VID2
VID1
VID0
VID125
1
1
1
1
1
X
No CPU
0
1
0
1
0
0
0.8375V
0
1
0
0
1
1
0.850V
0
1
0
0
1
0
0.8625V
0
1
0
0
0
1
0.875V
0
1
0
0
0
0
0.8875V
0
0
1
1
1
1
0.900V
0
0
1
1
1
0
0.9125V
0
0
1
1
0
1
0.925V
0
0
1
1
0
0
0.9375V
0
0
1
0
1
1
0.950V
0
0
1
0
1
0
0.9625V
0
0
1
0
0
1
0.975V
0
0
1
0
0
0
0.9875V
0
0
0
1
1
1
1.000V
0
0
0
1
1
0
1.0125V
0
0
0
1
0
1
1.025V
0
0
0
1
0
0
1.0375V
0
0
0
0
1
1
1.050V
0
0
0
0
1
0
1.0625V
0
0
0
0
0
1
1.075V
0
0
0
0
0
0
1.0875V
1
1
1
1
0
1
1.100V
1
1
1
1
0
0
1.1125V
1
1
1
0
1
1
1.125V
1
1
1
0
1
0
1.1375V
1
1
1
0
0
1
1.150V
1
1
1
0
0
0
1.1625V
1
1
0
1
1
1
1.175V
1
1
0
1
1
0
1.1875V
1
1
0
1
0
1
1.200V
1
1
0
1
0
0
1.2125V
To be continued
DS9401C-03 April 2011
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RT9401C
Table 1. Output Voltage Program (VR 10)
Pin Name
Nominal Output Voltage DACOUT
VID4
VID3
VID2
VID1
VID0
VID125
1
1
0
0
1
1
1.225V
1
1
0
0
1
0
1.2375V
1
1
0
0
0
1
1.250V
1
1
0
0
0
0
1.2625V
1
0
1
1
1
1
1.275V
1
0
1
1
1
0
1.2875V
1
0
1
1
0
1
1.300V
1
0
1
1
0
0
1.3125V
1
0
1
0
1
1
1.325V
1
0
1
0
1
0
1.3375V
1
0
1
0
0
1
1.350V
1
0
1
0
0
0
1.3625V
1
0
0
1
1
1
1.375V
1
0
0
1
1
0
1.3875V
1
0
0
1
0
1
1.400V
1
0
0
1
0
0
1.4125V
1
0
0
0
1
1
1.425V
1
0
0
0
1
0
1.4375V
1
0
0
0
0
1
1.450V
1
0
0
0
0
0
1.4625V
0
1
1
1
1
1
1.475V
0
1
1
1
1
0
1.4875V
0
1
1
1
0
1
1.500V
0
1
1
1
0
0
1.5125V
0
1
1
0
1
1
1.525V
0
1
1
0
1
0
1.5375V
0
1
1
0
0
1
1.550V
0
1
1
0
0
0
1.5625V
0
1
0
1
1
1
1.575V
0
1
0
1
1
0
1.5875V
0
1
0
1
0
1
1.600V
Note: (1) 0 : Connected to GND
(2) 1 : Open
(3) X : Don't Care
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DS9401C-03 April 2011
RT9401C
Typical Operating Characteristics
VVDA vs. Temperature
Error Between VVID & VVDA
0.35
0.35%
1.2
0.30%
0.30
VVID - VVDA (%)
1.201
VVDA (V)
1.199
1.198
1.197
1.196
0.25%
0.25
0.20%
0.20
0.15%
0.15
0.10%
0.10
0.05%
0.05
1.195
0.00%
0.00
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
VID on the Fly Falling
VVDA = 1.3V to 1.0625V
No Load
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
VVID (V)
VID on the Fly Rising
VVDA = 1.3V to 1.0625V
No Load
VDA (100mV/Div)
VDA (100mV/Div)
VID0 (5V/Div)
VID0 (5V/Div)
Time (50μs/Div)
DS9401C-03 April 2011
Time (50μs/Div)
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RT9401C
Outline Dimension
H
A
M
EXPOSED THERMAL PAD
(Bottom of Package)
Y
J
X
B
F
C
I
D
Dimensions In Millimeters
Symbol
Dimensions In Inches
Min
Max
Min
Max
A
4.801
5.004
0.189
0.197
B
3.810
4.000
0.150
0.157
C
1.346
1.753
0.053
0.069
D
0.330
0.510
0.013
0.020
F
1.194
1.346
0.047
0.053
H
0.170
0.254
0.007
0.010
I
0.000
0.152
0.000
0.006
J
5.791
6.200
0.228
0.244
M
0.406
1.270
0.016
0.050
X
2.000
2.300
0.079
0.091
Y
2.000
2.300
0.079
0.091
X
2.100
2.500
0.083
0.098
Y
3.000
3.500
0.118
0.138
Option 1
Option 2
8-Lead SOP (Exposed Pad) Plastic Package
Richtek Technology Corporation
Richtek Technology Corporation
Headquarter
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
5F, No. 95, Minchiuan Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: [email protected]
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit
design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be
guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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8
DS9401C-03 April 2011
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