RT9401A RICHTEK | Alldatasheet

Document overview

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Technical content

Features

zzzzz RT9401A Support 5bit DAC Voltage Conforming to Intel VRD10.x VID Table zzzzz RT9401B Support 5bit DAC Voltage Conforming to AMD K8 VID Table zzzzz 1% High Accuracy of VREF zzzzz Small Footprint Package of SOT-23-8 zzzzz RoHS Compliant and 100% Lead (Pb)-Free

Applications

z Desktop/Motherboard Microprocessor Core Power Regulation z High Accuracy and Programmable Voltage Power Regulation Pin Configurations (TOP VIEW) SOT-23-8 Note : There is no pin1 indicator on top mark for SOT-23-8 type, and pin 1 will be lower left pin when reading top mark from left to right. VID2 VDA VDD VID3 GND VID0 VID1 VID4 1 2 RT9401A/B VID1 VDD VID0 VID3 VDA GND VID2 CL VID4 5V 5 2 7 Note : RichTek Pb-free and Green products are : \RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. \Suitable for use in SnPb or Pb-free soldering processes. \`100%matte tin (Sn) plating. Package Type V8 : SOT-23-8 RT9401A/B VR10.X Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard)

DS9401A/B-06 March 2007www.richtek.com Function Block Diagram VREF MUX VID Input VID4 VID3 VID2 VID1 VDA VDD VID0 + Pin Number Pin Name Pin Function 1 VID2 DAC Voltage Identification Inputs. 2 VID1 DAC Voltage Identification Inputs. 3 VDA Digital - to - Analog Voltage Output. 4 VDD Power Input Pin. 5 VID0 DAC Voltage Identification Inputs. 6 GND Ground. 7 VID4 DAC Voltage Identification Inputs. 8 VID3 DAC Voltage Identification Inputs. Functional Pin Description

DS9401A/B-06 March 2007 www.richtek.com

Electrical Characteristics

(VDD = 5V, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units VDD Supply Current Nominal Supply Current I DD VDA open -- 2 5 mA Reference & DAC Output Voltage Program See Table 1 & Table 2 DAC Output Voltage Accuracy VDA < 1V -10 -- +10 mV VID(4:0) Input Low -- -- 0.4 V VID(4:0) Input High 1.05 -- -- V VID[4:0] Internal Pull-High Current Source Capability 18 -- -- μA When select AMD CPU 2.2 2.4 2.5 V VID[4:0] Internal Pull-High Voltage When select Intel CPU 1 1.1 1.2 V Output Buffer DC Gain Capacitor Load Only -- 70 -- dB Bandwidth GBW CL=1nF -- 1.64 -- MHz Slew Rate SR CL=0.1uF -- 9.5 -- mV/ μs Impedance R OUT 60 -- 110 Ω Absolute Maximum Ratings (Note 1) z Power Dissipation, PD @ TA = 25°C z Package Thermal Resistance (Note 4) z ESD Susceptibility (Note 2) Recommended Operating Conditions (Note 3)

DS9401A/B-06 March 2007www.richtek.com 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. Devices are ESD sensitive. Handling precaution recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. 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.

Table 1. Output Voltage Program (VR 10)

Table 2. Output Voltage Program (K8)

DS9401A/B-06 March 2007 www.richtek.com VVDA vs. Temperature 1.189 1.19 1.191 1.192 1.193 1.194 1.195 1.196 -40 -20 0 20 40 60 80 100 120 140 Temperature VVDA (V) Typical Operating Characteristics Error Between VVID & VVDA 0.1 0.2 0.3 0.4 0.5 0.6 0.7 VVID (V) VVID - VVDA (%) Time (25 μs/Div) VID on the Fly Rising VVDA = 1.3V to 1.0625V No Load VDA (100mV/Div) VID0 (1V/Div) (°C) Time (25 μs/Div) VID on the Fly Falling VDA (100mV/Div) VVDA = 1.3V to 1.0625V No Load VID0 (1V/Div)

DS9401A/B-06 March 2007www.richtek.com Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com Outline Dimension SOT-23-8 Surface Mount Package Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 1.000 1.450 0.039 0.057 A1 0.000 0.150 0.000 0.006 B 1.500 1.700 0.059 0.067 b 0.220 0.500 0.009 0.020 C 2.600 3.000 0.102 0.118 D 2.800 3.000 0.110 0.118 e 0.585 0.715 0.023 0.028 H 0.100 0.220 0.004 0.009 L 0.300 0.600 0.012 0.024 A B D C H L b e