DatasheetsPDF.com

RT9403A Dataheets PDF



Part Number RT9403A
Manufacturers Richtek Technology
Logo Richtek Technology
Description High Precision Reference Voltage Generator
Datasheet RT9403A DatasheetRT9403A Datasheet (PDF)

RT9403A/B/C I2C Programmable High Precision Reference Voltage Generator General Description Features The RT9403A/B/C 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 RT9403A/B/C features adjustable output slew rate, low switching glitch and adequate driving capability. The RT9403A/B/C is available in SOT-23-8 package. Ordering Information RT.

  RT9403A   RT9403A


Document
RT9403A/B/C I2C Programmable High Precision Reference Voltage Generator General Description Features The RT9403A/B/C 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 RT9403A/B/C features adjustable output slew rate, low switching glitch and adequate driving capability. The RT9403A/B/C is available in SOT-23-8 package. Ordering Information RT9403A/B/C Package Type V8 : SOT-23-8 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 Lead Plating System Applications G : Green (Halogen Free and Pb Free) z Power Supply Adjustment for Motherboard and Graphic Address Bit [A1,A0] A : [0,1] Card B : [1,0] z Low Voltage, High Accuracy Reference Voltage Circuit C : [1,1] Note : Richtek products are : Pin Configurations (TOP VIEW) S3/EN VOUT3 VOUT2 VOUT1 ` 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. 87 6 5 VDD GND SCL SDA Marking Information RT9403AGV8 01=DNN 01= : Product Code DNN : Date Code 2 34 SOT-23-8 RT9403BGV8 02=DNN 02= : Product Code DNN : Date Code RT9403CGV8 04=DNN 04= : Product Code DNN : Date Code DS9403A/B/C-00 May 2011 www.richtek.com 1 RT9403A/B/C Typical Application Circuit Data Bus Line Clock Bus Line 3.3V/5V 5V RT9403A/B/C 1 VDD CIN S3/EN 4 SDA 3 SCL 8 S3/EN VOUT1 5 VOUT2 6 VOUT3 7 GND 2 VIN1 REFIN DC/DC COUT1 Converter VIN2 REFIN DC/DC COUT2 Converter VIN3 REFIN DC/DC COUT3 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 DS9403A/B/C-00 May 2011 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 RT9403A/B/C 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 DS9403A/B/C-00 May 2011 www.richtek.com 3 RT9403A/B/C S VI D6 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 1 1 1 1 1 1 1 1 SVID5 1 1 1 1 1 1 1 1 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 SVID4 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 0 0 0 0 0 0 0 0 Table 1. DAC1/DAC2 Serial Code Table SVI D3 S VI D2 S VID 1 SVID0 1 00 0 1 00 1 1 01 0 1 01 1 1 10 0 1 10 1 1 11 0 1 11 1 0 00 0 0 00 1 0 01 0 0 01 1 0 10 0 0 10 1 0 11 0 0 11 1 1 00 0 1 00 1 1 01 0 1 01 1 1 10 0 1 10 1 1 11 0 1 11 1 0 00 0 0 00 1 0 01 0 0 01 1 0 10 0 0 10 1 0 11 0 0 11 1 1 00 0 1 00 1 1 01 0 1 01 1 1 10 0 1 10 1 1 11 0 1 11 1 Output Voltage ( V ) 1.68 75 1.67 50 1.66 25 1.6 500 1.63 75 1.62 50 1.61 25 1.60 00 1.58 75 1.57 50 1.56 25 1.55 00 1.53 75 1.52 50 1.51 25 1.50 00 1.48 75 1.47 50 1.46 25 1.45 00 1.43 75 1.42 50 1.41 25 1.40 00 1.38 75 1.37 50 1.36 25 1.35 00 1.33 75 1.32 50 1.31 25 1.30 00 1.28 75 1.27 50 1.26 25 1.25 00 1.23 75 1.22 50 1.21 25 1.20 00 To be continued www.richtek.com 4 DS9403A/B/C-00 May 2011 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.


RT9401D RT9403A RT9403B


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)