Voltage Generator. RT9403E Datasheet

RT9403E Generator. Datasheet pdf. Equivalent

RT9403E Datasheet
Recommendation RT9403E Datasheet
Part RT9403E
Description High Precision Reference Voltage Generator
Feature RT9403E; RT9403D/E/F/G I2C Programmable High Precision Reference Voltage Generator General Description The .
Manufacture Richtek Technology
Datasheet
Download RT9403E Datasheet




Richtek Technology RT9403E
RT9403D/E/F/G
I2C Programmable High Precision Reference Voltage Generator
General Description
The RT9403D/E/F/G is a high precision reference voltage
generating console consisting of three I2C programmable
DACs. Each DAC output voltage is controlled by 7 digital
bits that are programmed by the I2C interface. The
RT9403D/E/F/G features adjustable output slew rate, low
switching glitch and adequate driving capability. The
RT9403D/E/F/G is available in SOT-23-8 package.
Ordering Information
RT9403D/E/F/G
Package Type
V8 : SOT-23-8
Lead Plating System
G : Green
(Halogen Free and Pb Free)
Address Bit [A1,A0]
D : [0,0]
E : [0,1]
F : [1,0]
G : [1,1]
Note :
Richtek 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.
Pin Configurations
(TOP VIEW)
Features
z 5V Supply Voltage
z Provide 3 Precise Voltage DACs
z I2C Programmable 128-Steps Output Voltage
z Output Range and Resolution
` DAC1 & DAC2 : 0.6V to 2.1875V, 12.5mV/Step
` DAC3 : 1.2V to 3.375V, 12.5mV (or 25mV)/Step for
Different Segments
z High Output Accuracy Up to 1% (VOUT 1V)
z Low External Component Count
z Small Footprint SOT-23-8 Package
z RoHS Compliant and Halogen Free
Applications
z Power Supply Adjustment for Motherboard and Graphic
Card
z Low Voltage, High Accuracy Reference Voltage Circuit
Marking Information
RT9403DGV8
07=DNN
07= : Product Code
DNN : Date Code
RT9403EGV8
08=DNN
08= : Product Code
DNN : Date Code
87 6 5
2 34
SOT-23-8
RT9403FGV8
11=DNN
11= : Product Code
DNN : Date Code
RT9403GGV8
10=DNN
10= : Product Code
DNN : Date Code
DS9403D/E/F/G-00 September 2011
www.richtek.com
1



Richtek Technology RT9403E
RT9403D/E/F/G
Typical Application Circuit
3.3V/5V
5V
10k
Data Bus Line
Clock Bus Line
RT9403D/E/F/G
1 VDD
CIN
10k 4.7µF
S3/EN
4 SDA
3 SCL
8 S3/EN
VOUT1 5
VOUT2 6
VOUT3 7
GND 2
VIN1
REFIN DC/DC
COUT1
0.1µF
Converter
VIN2
REFIN DC/DC
COUT2
0.1µF
Converter
VIN3
REFIN DC/DC
COUT3
0.1µF
Converter
V1
V2
V3
Functional Pin Description
Pin No. Pin Name
Pin Function
1 VDD
Power Supply Input. Default connected to 5V.
2 GND
3 SCL
4 SDA
5 VOUT1
6 VOUT2
7 VOUT3
G round .
Serial Clock Input. This pin receives I2C serial bus clock signal.
Serial Data Input. This pin is input or output of I2C serial bus data signal.
I2C Programmed VTT Output Voltage. Default = 1.1V
I2C Programmed PCH_CORE Output Voltage. Default = 1.05V
I2C Programmed DDR Output Voltage. Default = 1.5V
8 S3/EN
ACPI S3 State/Enable. Active low for entering ACPI S3 State(suspend to RAM),
VOUT1/VOUT2 are internally pulled down to zero, only VOUT3 is active.
Function Block Diagram
VDD
I2C
Interface
S3/EN
SCL
SDA
GND
POR
Control and
Monitoring Unit
DAC1
7 bit
DAC2
7 bit
DAC3
7 bit
VOUT1
VOUT2
VOUT3
www.richtek.com
2
DS9403D/E/F/G-00 September 2011



Richtek Technology RT9403E
SVID6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SVID5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RT9403D/E/F/G
SVID4
0
0
0
0
0
0
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
1
0
0
0
0
0
0
0
0
Table 1. DAC1/DAC2 Serial Code Table
SVID3
S VID 2
SVID1
SVI D0
00 0 0
00 0 1
00 1 0
00 1 1
01 0 0
01 0 1
01 1 0
01 1 1
10 0 0
10 0 1
10 1 0
10 1 1
11 0 0
11 0 1
11 1 0
11 1 1
00 0 0
00 0 1
00 1 0
00 1 1
01 0 0
01 0 1
01 1 0
01 1 1
10 0 0
10 0 1
10 1 0
10 1 1
11 0 0
11 0 1
11 1 0
11 1 1
00 0 0
00 0 1
00 1 0
00 1 1
01 0 0
01 0 1
01 1 0
01 1 1
Output Voltage ( V )
2.1 875
2.1 750
2.1 625
2.1 500
2.1 375
2.1 250
2 .112 5
2.1 000
2.0 875
2.0 750
2.0 625
2.0 500
2.0 375
2.0 250
2.0 125
2.0 000
1.9 875
1.9 750
1.9 625
1.9 500
1.9 375
1.9 250
1.9 125
1.9 000
1.8 875
1.8 750
1.8 625
1.8 500
1.8 375
1.8 250
1.8 125
1.8 000
1.7 875
1.7 750
1.7 625
1.7 500
1.7 375
1.7 250
1.7 125
1.7 000
To be continued
DS9403D/E/F/G-00 September 2011
www.richtek.com
3







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