5Bit VID Reference Generator
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
z RT9401A Support 5bit DAC Voltage Conforming to
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
package of SOT-23-8.
z Desktop/Motherboard Microprocessor Core Power
V8 : SOT-23-8
z High Accuracy and Programmable Voltage Power
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
87 6 5
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.
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Typical Application Circuit
5V 4 VDD
DS9401A/B-07 June 2008