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Allegro
Allegro MicroSystems
Description : LNB supply and control-voltage regulator

LNB supply and control-voltage regulator

Intended for analog and digital satellite receivers, the low-noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator designed to provide power and interface signals to the LNB down converter via the coaxial cable. If the device is in stand-by mode (EN terminal LOW), the regulator output is disabled, allowing the antenna downconverters to be supplied or controlled by other satellite receivers sharing the same coaxial cable. Similar two-output LNB supply and control voltage regulators are the A8284SB/SLB.

FEATURES
■ Short-Circuit Protected Bypass Function for Slave Operation
LNB Selection and Stand-By Function
■ Built-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates
   DiSEqC™ (a trademark of EUTELSAT) Encoding
■ Full Modulation With No Load
■ Tracking Switch-Mode Power Converter for Lowest Dissipation
■ Externally Adjustable Short-Circuit protection
LNB Short-Circuit protection and Diagnostics
■ Auxiliary Modulation Input
■ Cable Length Compensation
■ Internal Over-Temperature protection

Allegro
Allegro MicroSystems
Description : TWO-OUTPUT LNB supply and control-voltage regulator

TWO-OUTPUT LNB supply and control-voltage regulator

Intended for analog and digital satellite receivers, the low noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator designed to provide power and interface signals to the LNB downconverter via the coaxial cable. Because most satellite receivers have two antenna ports, the output voltage of the regulator is available at one of two logic-selectable output terminals (LNBA, LNBB). If the device is in stand-by mode (EN terminal LOW), both regulator outputs are disabled, allowing the antenna downconverters to be supplied and controlled by other satellite receivers sharing the same coaxial cable. Similar single-output devices, with a bypass function for slave operation in single-dish dual-receiver systems, are the A8283SB/SLB.

FEATURES
■ Complete Interface for Two LNBs Remote supply and control
LNB Selection and Stand-By Function
■ Built-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates
   DiSEqC™ (a trademark of EUTELSAT) Encoding
■ Full Modulation With No Load
■ Tracking Switch-Mode Power Converter for Lowest Dissipation
■ Externally Adjustable Short-Circuit protection
LNB Short-Circuit protection and Diagnostics
■ Auxiliary Modulation Input
■ Cable Length Compensation
■ Internal Over-Temperature protection

Part Name(s) : LNBK20D2
ST-Microelectronics
STMicroelectronics
Description : LNB supply and control voltage regulator (PARALLEL INTERFACE)

DESCRIPTION
Intended for analog and digital satellite receivers, the LNBK20D2 is a monolithic linear voltage regulator, assembled in SO-20, specifically designed to provide the powering voltages and the interfacing signals to the LNB downconverter situated in the antenna via the coaxial cable.

■ COMPLETE INTERFACE for TWO LNBs
   REMOTE supply and control
■ GUARANTEED 400mA OUTPUT CURRENT
LNB SELECTION and STand-BY
   FUNCTION
■ BUILT-IN TONE OSCILLATOR FACTORY
   TRIMMED AT 22KHz
■ FAST OSCILLATOR START-UP FACILITATES
   DiSEqC ENCODING
■ TWO supply INPUTS for LOWEST
   DISSIPATION
■ BYPASS FUNCTION for SLAVE
   OPERATION
LNB SHORT CIRCUIT protection and
   DIAGNOSTIC
■ AUXILIARY MODULATION INPUT EXTENDS
   FLEXIBILITY
■ CABLE LENGTH COMPENSATION
■ INTERNAL OVER TEMPERATURE
   protection
■ BACKWARD CURRENT protection
■ COST-EFFECTIVE VERSION OF LNBP
   SERIES

Part Name(s) : LNBP8V7V LNBP9V7V
ST-Microelectronics
STMicroelectronics
Description : LNB supply and control voltage regulator

DESCRIPTION
Intended for analog and digital satellite receivers, the LNBP is a monolithic linear voltage regulator, assembled in HeptawattTM , specifically designed  to provide the powering voltages and the interfacing signals to the LNB down-converter.

■ SIMPLEST INTEGRATED SOLUTION for THE LNB REMOTE supply and control
■ 500mA GUARANTEED OUTPUT CURRENT
■ DUAL INPUT supply for REDUCING POWER DISSIPATION
■ 22KHZ BUILT-IN TONE OSCILLATOR (LNBP9 VERSION)
■ FAST OSCILLATOR START-UP for DiSEqCTM ENCODING (LNBP9 VERSION)
■ AUXILIARY MODULATION INPUT for MORE FLEXIBILITY (LNBP8 VERSION)
■ STand-BY FUNCTION
■ SHORT CIRCUIT and OVERTEMPERATURE protection
■ AVAILABLE IN THRU-HOLE PACKAGE

Part Name(s) : RT5047 RT5047GSP
Richtek
Richtek Technology
Description : Single Output LNB supply and control voltage regulator

General Description
The RT5047 is a highly integrated voltage regulator and interface IC, specifically design for supplying power and control signals from advanced satellite set-top box (STB) modules to the LNB down-converter in the antenna dish or to the multi-switch box. The device is consists of the independent current-mode boost controller and low dropout linear regulator along with the circuitry required for 22KHz tone shaping to support DiSEqCTM1.x communications. The RT5047 has fault protection (over-current, over-temperature and under-voltage lockout). The RT5047 are available in a SOP-8 (Exposed Pad) package to achieve optimized solution for thermal dissipation.

Features
Wide Input supply voltage Range : 8V to 16V
Output Current Limit of 550mA with 45ms timer
Low Noise LNB Output voltage (13.3V and 18.3V by SEL Pin)
3% High Accuracy for 0mA to 500mA Current Output
Push-Pull Output Stage minimizes 13.3V to 18.3V and 18.3V to 13.3V Output Transition Time
External 22kHz Tone Input
Meet DiSEqCTM1.x Protocol
Output Short Circuit protection
Over-temperature protection

Applications
LNB Power supply and control for Satellite Set-Top Box
Analog and Digital Satellite Receivers/ Satellite TV,Satellite PC cards

Part Name(s) : RT5047A RT5047AGSP
Richtek
Richtek Technology
Description : Single Output LNB supply and control voltage regulator

General Description
The RT5047A is a highly integrated voltage regulator and interface IC, specifically design for supplying power and control signals from advanced satellite set-top box (STB) modules to the LNB down-converter in the antenna dish or to the multi-switch box.
The device is consists of the independent current-mode boost controller and low dropout linear regulator along with the circuitry required for 22KHz tone shaping to support DiSEqC™1.x communications.
The RT5047A has fault protection (over-current, over-temperature and under-voltage lockout).
The RT5047A are available in a SOP-8 (Exposed Pad) package to achieve optimized solution for thermal dissipation.

Features
• Wide Input supply voltage Range : 8V to 16V
• Output Current Limit of 550mA with 45ms timer
• Low Noise LNB Output voltage (13.3V and 18.3V
   by SEL Pin)
• ±3% High Accuracy for 0mA to 500mA Current
   Output
• Push-Pull Output Stage minimizes 13.3V to
   18.3V and 18.3V to 13.3V Output Transition Time
• External 22kHz Tone Input
• Meet DiSEqCTM1.x Protocol
• Output Short Circuit protection
• Over-temperature protection

Applications
LNB Power supply and control for Satellite Set-Top
   Box
• Analog and Digital Satellite Receivers/ Satellite TV,
   Satellite PC cards

Allegro
Allegro MicroSystems
Description : LNB supply and control voltage regulator

LNB supply and control voltage regulator

Intended for analog and digital satellite receivers, the LNB (low noise block) converter regulator is a monolithic linear and switching voltage regulator, specifically designed to provide power and interface signals to an LNB downconverter, via coaxial cable.
The device uses a 2-wire bidirectional serial interface, compatible with the I2C (Inter-C bus) standard, that operates up to 400 kHz.
The A8285 is supplied in a 16-lead plastic power SOIC with internally fused leads for thermal dissipation. The A8287 is supplied in a 24-lead plastic power SOIC with internally fused leads. Both devices are also available in lead (Pb) free versions, with 100% matte tine leadframe plating.

FEATURES
LNB selection and standby function
■ Provides up to 500 mA load current
■ Two-wire serial I2C interface
■ Built-in tone oscillator, factory-trimmed to 22 kHz; facilitates DiSEqC™ 2.0 encoding
■ Auxiliary modulation input
■ 22 kHz tone detector facilitates DiSEqC™ decoding (A8287 only)
■ Tracking switch-mode power converter for lowest dissipation
LNB overcurrent protection and diagnostics
■ Internal overtemperature protection
LNB voltages (16 possible levels) compatible with all common standards

Description : Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

The ISL6421 is a highly integrated solution for supplying power and control signals from advanced satellite set-top box (STB) modules to the low noise block (LNB). This device is comprised of a current-mode boost PWM and a low-noise linear regulator, along with the circuitry required for I2C device interfacing and for providing DiSEqCTM standard control signals to the LNB.

Features
• Switch-Mode Power Converter for Lowest Dissipation
    - Boost PWM with >92% Efficiency
    - Selectable 13V or 18V Outputs
    - Digital Cable Length Compensation (1V)
• External Pin to Select 13V/18V Options
• I2C Compatible Interface for Remote Device control
    - Registered Slave Address 0001 00XX
    - Fully Functional 3.3V, 5V Operation up to 400kHz
• Built-In Tone Oscillator Factory Trimmed to 22kHz
    - Facilitates DiSEqC (EUTELSAT) Encoding
• Internal Over-Temperature protection and Diagnostics
• Internal Overload and Overtemp Flags (Visible on I2C)
LNB Short-Circuit protection and Diagnostics
• QFN Package
    - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline
    - Near Chip-Scale Package Footprint
• Pb-free available

Applications
LNB Power supply and control for Satellite Set-Top Box

Renesas
Renesas Electronics
Description : Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

The ISL6421 is a highly integrated solution for supplying power and control signals from advanced satellite set-top box (STB) modules to the low noise block (LNB). This device is comprised of a current-mode boost PWM and a low-noise linear regulator, along with the circuitry required for I2C device interfacing and for providing DiSEqCTM standard control signals to the LNB.

Features
• Switch-Mode Power Converter for Lowest Dissipation
    - Boost PWM with >92% Efficiency
    - Selectable 13V or 18V Outputs
    - Digital Cable Length Compensation (1V)
• External Pin to Select 13V/18V Options
• I2C Compatible Interface for Remote Device control
    - Registered Slave Address 0001 00XX
    - Fully Functional 3.3V, 5V Operation up to 400kHz
• Built-In Tone Oscillator Factory Trimmed to 22kHz
    - Facilitates DiSEqC (EUTELSAT) Encoding
• Internal Over-Temperature protection and Diagnostics
• Internal Overload and Overtemp Flags (Visible on I2C)
LNB Short-Circuit protection and Diagnostics
• QFN Package
    - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline
    - Near Chip-Scale Package Footprint
• Pb-free available

Applications
LNB Power supply and control for Satellite Set-Top Box

Description : Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

Single Output LNB supply and control voltage regulator with I2C Interface for Advanced Satellite Set-top Box Designs

The ISL6425 is a highly integrated solution for supplying power and control signals from advanced satellite set-top box (STB) modules to the low noise block (LNB). This device is comprised of a current-mode boost PWM and a low-noise linear regulator, along with the circuitry required for I2C device interfacing and for providing DiSEqC standard control signals to the LNB.

Features
• Switch-Mode Power Converter for Lowest Dissipation
    - Boost PWM with >92% Efficiency
    - Selectable 13V or 18V Outputs
    - Digital Cable Length Compensation (1V)
• External Pin to Select 13V/18V Options
• DSQIN and SEL18V pins are 2.5V logic compatible
• I2C Compatible Interface for Remote Device control
    - Registered Slave Address 0001 00XX
    - Fully Functional 3.3V, 5V Operation up to 400kHz
• Built-In Tone Oscillator Factory Trimmed to 22kHz
    - Facilitates DiSEqC (EUTELSAT) Encoding
• Internal Over-Temperature protection and Diagnostics
• Internal Overload and Overtemp Flags (Visible on I2C)
LNB Short-Circuit protection and Diagnostics
• QFN Package
    - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Product Outline
    - Near Chip-Scale Package Footprint
• Pb-free available (RoHS Compliant)

Applications
LNB Power supply and control for Satellite Set-Top Box

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