A8303-1 Datasheet | Allegro MicroSystems

A8303 and A8303-1 Single LNB Supply and Control Voltage Regulator Features AND BENEFITS - Integrated boost MOSFET, current sensing, and pensation - Stable with low-profile ceramic boost capacitors - Configurable output settings to meet global requirements - A8303-1 includes 11.667 V setting to meet Japanese market requirements - Adjustable LNB output current limit from 250 to 950 m A - - Covers wide array of application requirements - - Minimizes ponent sizing to fit each application - - For startup, reconfiguration, and continuous output (maximum value depends on PCB thermal design) - Boost peak current limit scales with LNB current limit setting - 8 programmable LNB output voltage (DAC) levels - LNB overcurrent limiter with shutdown timer - Static LNB current limit reliably starts a wide range of loads - Tracking boost converter minimizes power dissipation - LNB transition times configurable by external capacitor Continued on the next page… PACKAGE: 20-contact MLP/QFN (suffix ES) 4 mm × 4 mm × 0.75 mm DESCRIPTION Intended for analog and digital satellite receivers, these single low noise block converter regulator (LNBR) are monolithic linear and switching voltage regulators, specifically designed to provide the power and the interface signals to an LNB down converter via coaxial cable. The A8303 and A8303-1 require few external ponents, with the boost switch and pensation circuitry integrated inside of the devices. A high switching frequency is chosen to minimize the size of the passive filtering ponents, further assisting in cost reduction. The high levels of ponent integration ensure extremely low noise and ripple figures. The A8303 and A8303-1 have been designed for high efficiency, using 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 Di SEq C™ munications, a tone...