RT9401B [RICHTEK]
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| 型号： | RT9401B |
| 厂家： | 
RICHTEK TECHNOLOGY CORPORATION |
| 描述： | 暂无描述 |
| 文件： | 总8页 (文件大小：108K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RT9401A/B
5Bit VID Reference Generator
General Description
Features
z RT9401A Support 5bit DAC Voltage Conforming to
The RT9401A/B are digital to analog converters which
generate a reference voltage for Intel VR10.x/AMD K8
5-bit VID code respectively. The parts are 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. These parts use a small footprint
package of SOT-23-8.
Intel VRD10.x VID Table
z RT9401B Support 5bit DAC Voltage Conforming to
AMD K8 VID Table
z 1% High Accuracy of VREF
z Small Footprint Package of SOT-23-8
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
z Desktop/Motherboard Microprocessor Core Power
RT9401A/B
Regulation
Package Type
V8 : SOT-23-8
z High Accuracy and Programmable Voltage Power
Regulation
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free) Pin Configurations
(TOP VIEW)
K8
VR10.X
Note :
Richtek products are :
8
7
2
6
3
5
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
4
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
SOT-23-8
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Typical Application Circuit
RT9401A/B
VID3
1
8
VID2
2
7
6
5
VID1
VID4
GND
VID0
3
VDA
4
5V
VDD
CL
DS9401A/B-08 April 2011
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RT9401A/B
Function Block Diagram
VDD
VID4
VID3
VID2
VID1
VID0
VID
Input
MUX
+
-
VDA
V
REF
Functional Pin Description
Pin Number Pin Name Pin Function
1
2
3
4
5
6
7
8
VID2
VID1
VDA
VDD
VID0
GND
VID4
VID3
DAC Voltage Identification Inputs.
DAC Voltage Identification Inputs.
Digital - to - Analog Voltage Output.
Power Input Pin.
DAC Voltage Identification Inputs.
Ground.
DAC Voltage Identification Inputs.
DAC Voltage Identification Inputs.
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DS9401A/B-08 April 2011
RT9401A/B
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VDD ------------------------------------------------------------------------------------------- 7V
z Power Dissipation, PD @ TA = 25°C
SOT-23-8 ---------------------------------------------------------------------------------------------------------------- 0.4W
z Package Thermal Resistance (Note 2)
SOT-23-8, θJA ----------------------------------------------------------------------------------------------------------- 250°C/W
z Lead Temperature (Soldering, 10 sec.)--------------------------------------------------------------------------- 260°C
z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Input Voltage, VDD ------------------------------------------------------------------------------------------- 5V 10%
z Junction Temperature Range---------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range --------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VDD = 5V, TA = 25°C, unless otherwise specified)
Parameter
VDD Supply Current
Symbol
Test Conditions
Min
Typ
Max Units
Nominal Supply Current
Reference & DAC
IDD
VDA open
--
2
5
mA
Output Voltage Program
See Table 1 & Table 2
≥
VDA
1V
-1
-10
--
--
--
--
--
+1
+10
0.4
--
%
mV
V
DAC Output Voltage Accuracy
VDA < 1V
VID(4:0) Input Low
VID(4:0) Input High
1.05
V
VID[4:0] Internal Pull-High Current
Source Capability
18
--
--
μA
When select AMD CPU
When select Intel CPU
2.2
1
2.4
1.1
2.5
1.2
V
V
VID[4:0] Internal Pull-High Voltage
Output Buffer
DC Gain
Capacitor Load Only
CL=1nF
--
--
70
1.64
9.5
--
--
--
dB
MHz
mV/μs
Ω
Bandwidth
Slew Rate
Impedance
GBW
SR
CL=0.1uF
--
--
ROUT
60
110
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RT9401A/B
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 TA = 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 is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
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DS9401A/B-08 April 2011
RT9401A/B
Table 1. Output Voltage Program (VR 10)
Pin Name
VID2
Nominal Output Voltage VDA
VID4
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
VID3
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
VID1
1
0
0
1
1
0
0
1
1
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
VID0
1
1
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
1
1
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
OFF
0.850V
0.875V
0.900V
0.925V
0.950V
0.975V
1.000V
1.025V
1.050V
1.075V
1.100V
1.125V
1.150V
1.175V
1.200V
1.225V
1.250V
1.275V
1.300V
1.325V
1.350V
1.375V
1.400V
1.425V
1.450V
1.475V
1.500V
1.525V
1.550V
1.575V
1.600V
Note: (1) 0 : Connected to GND
(2) 1 : Open
DS9401A/B-08 April 2011
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RT9401A/B
Table 2. Output Voltage Program (K8)
VID4
0
VID3
VID2
0
VID1
0
VID0
0
Nominal Output Voltage VDA
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1.550
1.525
1.500
1.475
1.450
1.425
1.400
1.375
1.350
1.325
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1.100
1.075
1.050
1.025
1.000
0.975
0.950
0.925
0.900
0.875
0.850
0.825
0.800
Shutdown
Note: (1) 0 : Connected to GND
(2) 1 : Open
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DS9401A/B-08 April 2011
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RT9401A/B
Typical Operating Characteristics
Error Between VVID & VVDA
VVDA vs. Temperature
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.196
1.195
1.194
1.193
1.192
1.191
1.19
1.189
-40 -20
0
20
40
60
80 100 120 140
0.85
0.975
1.1
1.225
1.35
1.475
1.6
Temperature
(°C)
VVID (V)
VID on the Fly Falling
VID on the Fly Rising
VVDA = 1.3V to 1.0625V
No Load
VVDA = 1.3V to 1.0625V
No Load
VDA (100mV/Div)
VDA (100mV/Div)
VID0 (1V/Div)
VID0 (1V/Div)
Time (25μs/Div)
Time (25μs/Div)
DS9401A/B-08 April 2011
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RT9401A/B
Outline Dimension
H
D
L
C
A
B
b
A1
e
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
1.000
0.000
1.500
0.220
2.600
2.800
0.585
0.100
0.300
1.450
0.150
1.700
0.500
3.000
3.000
0.715
0.220
0.600
0.039
0.000
0.059
0.009
0.102
0.110
0.023
0.004
0.012
0.057
0.006
0.067
0.020
0.118
0.118
0.028
0.009
0.024
b
C
D
e
H
L
SOT-23-8 Surface Mount Package
Richtek Technology Corporation
Headquarter
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Tel: (8862)86672399 Fax: (8862)86672377
Email: marketing@richtek.com
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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DS9401A/B-08 April 2011
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