RT9401A/B
5Bit VID Reference Generator
General Description
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.
Features
RT9401A Support 5bit DAC Voltage
Conforming to
Intel VRD10.x VID Table
RT9401B Support 5bit DAC Voltage Conforming to
AMD K8 VID Table
1% High Accuracy of V
REF
Small Footprint Package of
SOT-23-8
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Ordering Information
RT9401A/B
Package Type
V8 : SOT-23-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
K8
VR10.X
Note :
RichTek Pb-free and Green products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VID2
VID1
VDA
Desktop/Motherboard Microprocessor Core Power
Regulation
High Accuracy and Programmable Voltage Power
Regulation
Pin Configurations
(TOP VIEW)
VID3
VID4
VID0
GND
8
1
7
2
6
3
5
4
VDD
Suitable for use in SnPb or Pb-free soldering processes.
100%matte tin (Sn) plating.
SOT-23-8
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
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.
Typical Application Circuit
RT9401A/B
1
2
3
5V
CL
4
VID2
VID1
VDA
VDD
VID3
VID4
GND
VID0
8
7
6
5
DS9401A/B-06 March 2007
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
