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