ISL6405 Data Sheet July 2004 FN9026.2 Dual Output LNB Supply and Control Features 2 Voltage Regulator with I C Interface for Single Chip Power solution Advanced Satellite Set-Top Box Designs - True Dual Operation for 2-Tuner/2-Dish Applications - Both Outputs May be Enabled Simultaneously at The ISL6405 is a highly integrated voltage regulator and Maximum Power interface IC, specifically designed for supplying power and 2 - Integrated DC-DC Converter and I C Interface control signals from advanced satellite set-top box (STB) modules to the low noise blocks (LNBs) of two antenna Switch-Mode Power Converter for Lowest Dissipation ports. The device is comprised of two independent current- - Boost PWMs with > 92% Efficiency mode boost PWMs and two low-noise linear regulators along - Selectable 13V or 18V Outputs with the circuitry required for 22kHz tone generation, - Digital Cable Length Compensation (1V) 2 modulation and I C device interface. The device makes the 2 I C Compatible Interface for Remote Device Control total LNB supply design simple, efficient and compact with - Registered Slave Address 0001 00XX low external component count. - Full 3.3V/5V Operation up to 400kHz Two independent current-mode boost converters provide the External Pins to Select 13V/18V Options linear regulators with input voltages that are set to the final - Available with QFN Package Only output voltages, plus typically 1.2V to insure minimum power Built-In Tone Oscillator Factory Trimmed to 22kHz dissipation across each linear regulator. This maintains - Facilitates DiSEqC (EUTELSAT) Encoding TM constant voltage drops across each linear pass element Internal Over-Temperature Protection and Diagnostics while permitting adequate voltage range for tone injection. 2 Internal Overload and Overtemp Flags (Visible on I C) The final regulated output voltages are available at two output terminals to support simultaneous operation of two LNB Short-Circuit Protection and Diagnostics antenna ports for dual tuners. The outputs for each PWM are QFN Package set to 13V or 18V by independent voltage select commands - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat 2 (VSEL1, VSEL2) through the I C bus. Additionally, to No Leads - Product Outline compensate for the voltage drop in the coaxial cable, the - Near Chip-Scale Package Footprint selected voltage may be increased by 1V with the line length Pb-free Packaging Available compensation (LLC) feature. All the functions on this IC are - Designated with Z Suffix (Refer to Note Below) 2 controlled via the I C bus by writing 8 bits on System Register (SR, 8 bits). The same register can be read back, Applications and two bits will report the diagnostic status. Separate enable 2 LNB Power Supply and Control for Satellite Set-Top Box commands sent on the I C bus provide independent standby mode control for each PWM and linear combination, disabling References the output into shutdown mode. Tech Brief 389 (TB389) - PCB Land Pattern Design and Each output channel is capable of providing 750mA of Surface Mount Guidelines for QFN Packages Available continuous current. The overcurrent limit can be digitally on the Intersil website, www.intersil.com programmed. The SEL18V pin with QFN package allows the Ordering Information 2 13V to 18V transition with an external pin, over-riding the I C o input. PART TEMP. RANGE ( C) PACKAGE PKG. DWG. ISL6405EEB -20 to 85 28 Ld EPSOIC M28.3B ISL6405EEBZ -20 to 85 28 Ld EPSOIC M28.3B (Note 1) (Pb-free) ISL6405ER -20 to 85 32 Ld 5x5 QFN L32.5x5 ISL6405ERZ -20 to 85 32 Ld 5x5 QFN L32.5x5 (Note 1) (Pb-free) NOTES: 1. Intersil Pb-free products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which is 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-020B. 2. Tape and Reel available. Add -T suffix for Tape and Reel Packing Option. CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 321-724-7143 Intersil (and design) is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004. All Rights ReservedISL6405 ISL6405 (EPSOIC) TOP VIEW VSW2 1 28 VCC COMP2 2 27 CPVOUT FB2 3 26 CPSWIN 25 CPSWOUT GATE2 4 PGND 2 5 24 TCAP2 CS2 6 23 DSQIN2 ISL6405EEB SGND 7 22 VO2 BYPASS 8 21 AGND PGND1 9 20 VO1 GATE1 10 19 DSQIN1 CS1 11 18 TCAP1 FB1 12 17 SCL 16 COMP1 13 ADDR 14 15 SDA VSW1 ISL6405 (QFN) TOP VIEW 32 31 30 29 28 27 26 25 PGND2 24 CPSWOUT 1 CS2 2 23 TCAP2 SGND DSQIN2 3 22 SEL18V1 VO2 4 21 ISL6405ER SEL18V2 5 20 AGND BYP VO1 6 19 PGND1 7 18 DSQIN1 GATE1 8 17 TCAP1 9 10 11 12 1314 1516 2 CS1 GATE2 FB1 FB2 COMP1 COMP2 VSW1 VSW2 NC NC SDA VCC ADDR CPVOUT SCL CPSWIN