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A8290
Single LNB Supply and Control Voltage Regulator
Features and Benefits
▪ 2-wire serial I2C™ -compatible interface: control (write) and status (read)
▪ LNB voltages (16 programmable levels) compatible with all common standards
▪ Tracking switch-mode power converter for lowest dissipation ▪ Integrated converter switches and current sensing ▪ Output current limit of 900 mA typical, with 48 ms timer ▪ Static current limit circuit allows full current at startup and
13→18 V output transition; reliably starts wide load range ▪ Push-pull output stage minimizes 13→18 V and 18→13 V
output transition times for highly capacitive loads ▪ Adjustable rise/fall time via external timing capacitor ▪ Built-in tone oscillator, factory-trimmed to 22 kHz
facilitates DiSEqC™ tone encoding, even at no-load
A8290 Datasheet
