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PDF RT9403 Data sheet ( Hoja de datos )
| Número de pieza | RT9403 | |
| Descripción | I2C Programmable High Precision Reference Voltage Generator | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9403 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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RT9403
I2C Programmable High Precision Reference Voltage
Generator
General Description
Features
The RT9403 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 RT9403 features
adjustable output slew rate, low switching glitch and
adequate driving capability. The RT9403 is available in
SOT-23-8 package.
Ordering Information
RT9403
Package Type
V8 : SOT-23-8
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
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.
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
Pin Configurations
(TOP VIEW)
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
87 6 5
2 34
Typical Application Circuit
3.3V/5V 5V
Data Bus Line
Clock Bus Line
S3/EN
RT9403
1 VDD
CIN
VOUT1 5
VOUT2 6
4 SDA
3 SCL
8 S3/EN
VOUT3 7
GND 2
DS9403-01 April 2011
SOT-23-8
VIN1
REFIN DC/DC
COUT1
Converter
VIN2
REFIN DC/DC
COUT2
Converter
VIN3
REFIN DC/DC
COUT3
Converter
V1
V2
V3
www.richtek.com
1
1 page  
SVID6
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
S VI D5
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
1
1
1
1
1
1
1
1
SVI D4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Table 1. DAC1/DAC2 Serial Code Table
S VI D3
SVI D2
SVI D1
SVID0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
0000
0001
0010
0011
0100
0101
0110
0111
RT9403
Output Voltage ( V )
1.1 875
1.1 750
1.1 625
1.1 500
1.1 375
1.1 250
1 .112 5
1.1 000
1.0 875
1.0 750
1.0 625
1.0 500
1.0 375
1.0 250
1.0 125
1.0 000
0.9 875
0.9 750
0.9 625
0.9 500
0.9 375
0.9 250
0.9 125
0.9 000
0.8 875
0.8 750
0.8 625
0.8 500
0.8 375
0.8 250
0.8 125
0.8 000
0.7 875
0.7 750
0.7 625
0.7 500
0.7 375
0.7 250
0.7 125
0.7 000
To be continued
DS9403-01 April 2011
www.richtek.com
5
5 Page 
RT9403
Absolute Maximum Ratings (Note 1)
z Supply Voltage, VDD ------------------------------------------------------------------------------------------------------ 6.5V
z Input Voltage, SCL, SDA, S3/EN -------------------------------------------------------------------------------------- 6.5V
z Output Voltage, VOUT1, VOUT2, VOUT3 --------------------------------------------------------------------------------------------------------------------- 4V
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 Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
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 Voltage, VDD ------------------------------------------------------------------------------------------------------ 5V ± 5%
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 specification)
Parameter
Symbol
Test Conditions
Supply Input Voltage
VDD
POR Threshold
VPOR_TH
POR Hysteresis
VPOR_HYS
Supply Input Current
VREF & DAC
DAC Output Accuracy
Under−Voltage Lockout
Hysteresis
IVDD
VOUT ≥ 1V, IOUT = 0A
VOUT < 1V, IOUT = 0A
Output Buffer
DC Gain
Capacitive Load Only
Bandwidth
Slew Rate
Impedance
Output Driving Capability
Loading Effect Regulation
I2C Signal
GBW
SR
ROUT
IOUT
CL = 1nF
CL = 0.1μF
Input High Threshold
Input Low Threshold
SCL Clock Speed
VIH
VIL
EN High Threshold
EN Low Threshold
VEN_H
VEN_L
Min Typ Max Unit
4.75 5 5.25 V
4
4.25 4.4
V
--
250 --
mV
--
0.65 --
mA
−1 -- +1 %
−10 -- +10 mV
--
--
--
--
--
−0.002
70 -- dB
1.64 -- MHz
11 -- mV/μs
90 --
Ω
1.1 -- mA
-- 0.002 %/μA
2.4
--
--
VDD − 0.3
--
--
--
--
--
--
-- V
0.8 V
400 k/bit/s
-- V
0.3 V
DS9403-01 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet RT9403.PDF ] | |
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