DATASHEET ISL6422B FN6486 Rev 2.00 Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Sep 8, 2015 Advanced Satellite Set-Top Box Designs The ISL6422B is a highly integrated voltage regulator and Features interface IC, specifically designed for supplying power and Single Chip Power Solution control signals from advanced satellite set-top box (STB) - True Dual Operation for 2-Tuner/2-Dish Applications modules to the low noise blocks (LNBs) of two antenna - Both Outputs May be Enabled Simultaneously at ports. The device is consists of two independent current- Maximum Power mode boost PWMs and two low-noise linear regulators along 2 - Integrated DC/DC Converter and I C Interface with the circuitry required for 22kHz tone generation, 2 Switch-Mode Power Converter for Lowest Dissipation modulation and I C device interface. The device makes the - Boost PWMs with >92% Efficiency total LNB supply design simple, efficient and compact with - Selectable 13.3V or 18.3V Outputs low external component count. - Digital Cable Length Compensation (1V) 2 Two independent current-mode boost converters provide the -I C and Pin Controllable Output linear regulators with input voltages that are set to the final Output Back Bias Capability of 28V output voltages, plus typically 0.8V to insure minimum power 2 I C Compatible Interface for Remote Device Control dissipation across each linear regulator. This maintains Four level Slave Address 0001 00XX constant voltage drops across each linear pass element 2.5V/3.3V/5V Logic Compatible while permitting adequate voltage range for tone injection. External Pins to Toggle Between V and H Polarization The final regulated output voltages are available at two Built-In Tone Oscillator Factory Trimmed to 22kHz output terminals to support simultaneous operation of two - Facilitates DiSEqC (EUTELSAT) Encoding antenna ports for dual tuners. The outputs for each PWM 2 - External Modulation Input can be controlled in two ways, full control from I C using the 2 Internal Over-Temperature Protection and Diagnostics VTOP1, VTOP2 and VBOT1, VBOT2 bits or set the I C to the lower range ie 13V/14V and switch to higher range ie Internal OV, UV, Overload and Overtemp Flags (Visible on 2 18V/19V with the SELVTOP1, SELVTOP2 pins. All the I C) 2 functions on this IC are controlled via the I C bus by writing FLT Signal 8 bits words onto the System Registers (SR). The same LNB Short-Circuit Protection and Diagnostics register can be read back, and four bits per output will report QFN and EPTSSOP Packages the diagnostic status. Separate enable commands sent on the 2 Pb-Free Plus Anneal Available (RoHS Compliant) I C bus provide independent standby mode control for each PWM and linear combination, disabling the output into Applications shutdown mode. Each output channel is capable of providing 750mA of continuous current. The overcurrent limit can be LNB Power Supply and Control for Satellite Set-Top Box digitally programmed. Ordering Information The External modulation input EXTM1, EXTM2 can accept a TEMP. modulated DiSEqC command and transfer it symetrically to PART NUMBER PART RANGE PACKAGE PKG. the output. Alternatively the EXTM1, EXTM2 pins can be (Note) MARKING (C) (Pb-Free) DWG. used to modulate the continuous internal tone. ISL6422BERZ* 6422B ERZ -20 to +85 40 Ld 6x6 QFN L40.6x6 The FLT pin serves as an interrupt for the processor when any ISL6422BEVEZ* 6422B EVEZ -20 to +85 38 Ld EPTSSOP M38.173B (No longer condition turns OFF the LNB controller (Over- Temperature, available, Overcurrent, Disable). The nature of the fault can be read of Recommended 2 the I C registers. Replacement ISL6422BERZ) *Add -T suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN6486 Rev 2.00 Page 1 of 19 Sep 8, 2015ISL6422B Pinouts ISL6422B (38 LD EPTSSOP) TOP VIEW CS2 1 38 TXT2 VSW2 2 37 SELVTOP2 3 36 TCAP2 VSW2 GATE2 4 35 AGND PGND2 5 34 VOUT2 EXTM2 6 33 TDIN2 SGND 7 32 TDOUT2 FLT 8 31 CPVOUT SDA 9 30 CPSWOUT SCL 10 29 CPSWIN ADDR0 11 28 VCC 27 TDOUT1 ADDR1 12 EXTM1 13 26 TDIN1 BYP 14 25 VOUT1 PGND1 15 24 AGND GATE1 16 23 TCAP1 22 SELVTOP1 VSW1 17 VSW1 18 21 NC CS1 19 20 TXT1 ISL6422B (40 LD 6X6 QFN) TOP VIEW 40 39 38 37 36 35 34 33 32 31 EXTM2 1 30 VOUT2 SGND 2 29 TDIN2 NC 3 28 TDOUT2 4 27 FLT CPVOUT 5 26 SDA CPSWOUT SCL 6 25 CPSWIN ADDR0 7 24 VCC ADDR1 8 23 TDOUT1 EXTM1 TDIN1 9 22 BYP 10 21 VOUT1 11 12 13 14 15 16 17 18 19 20 FN6486 Rev 2.00 Page 2 of 19 Sep 8, 2015 NO LONGER AVAILABLE OR SUPPORTED PGND1 PGND2 GATE1 GATE2 NC NC VSW1 VSW2 CS1 CS2 TXT1 TXT2 SELVTOP1 SELVTOP2 TCAP1 TCAP2 AGND AGND VOUT2 VOUT1