A8283 Datasheet PDF - Allegro MicroSystems

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