A8296SESTR-T

Allegro | Product | A8296 Single LNB Supply and Control Voltage Regulator Page 1 of 2 Home / Products / Part Numbers / A8296 A8296 Single LNB Supply and Control Voltage Regulator Contact Allegro Marketing for datasheet. Features • • • • • • • • • • • • • • Integrated boost MOSFET, current sensing, and compensation Supplies up to 500 mA continuously Adjustable LNB output current limit from 300 to 500 mA Boost peak current limit scales with LNB current limit setting 8 programmable LNB output voltage (DAC) levels LNB overcurrent limiter with shutdown timer Tracking boost converter minimizes power dissipation LNB transition times configurable by external capacitor Push-pull LNB output stage maintains 13→18 V and 8→13 V transition times, even with highly capacitive loads Built-in 22 kHz tone oscillator facilitates DiSEqC™ tone encoding, even at no-load Tone generation does not require additional external components Diagnostic features: PNG Extensive protection features: UVLO, OCP, TSD, CPOK 2-wire I2C-compatible interface Description Intended for analog and digital satellite receivers, this single low noise block converter regulator (LNBR) is a monolithic linear and switching voltage regulator, specifically designed to provide the power and the interface signals to an LNB down converter via coaxial cable. The A8296 requires few external components, with the boost switch and compensation circuitry integrated inside of the device. The A8296 has been designed for high efficiency, utilizing the Allegro® advanced BCD process. The integrated boost switch has been optimized to minimize both switching and static losses. To further enhance efficiency, the voltage drop across the tracking regulator has been minimized. For DiSEqC™ communications, a tone control pin is provided to gate the internally-generated 22 kHz tone on-and-off. A comprehensive set of fault registers are provided, which comply with all the common standards, including: overcurrent, thermal shutdown, undervoltage, and power not good. Furthermore, design methodology and structure ensure the highest level of robustness against transients and component failures. The device uses a 2-wire bidirectional serial interface, compatible with the I2C™ standard, that operates up to 400 kHz. The A8296 is supplied in a lead (Pb) free package. Functional Block Diagram Complete Part Numbers Part Number Package Type A8296SESTR-T 16-lead QFN RoHS Part Composition/ Temperature Comments Compliant RoHS Data Yes view data -20 °C to 85 °C new Samples/Demo Contact Local Sales Representative or check distributor stock Distributor Stock All Check Stock Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. http://www.allegromicro.com/en/Products/Part_Numbers/8296/ 10/4/2011 Allegro | Product | A8296 Single LNB Supply and Control Voltage Regulator Page 2 of 2 Copyright © 2011 Allegro MicroSystems, Inc. • 115 Northeast Cutoff, Worcester, MA 01606 USA • Phone: 1.508.853.5000 • Fax: 1.508.853.7895 http://www.allegromicro.com/en/Products/Part_Numbers/8296/ 10/4/2011