DESCRIPTION

· Monolithic linear and switching voltage regulators for LNB down converters.
· Designed for analog and digital satellite receivers.
· Provides power and interface signals via coaxial cable.
· Standby mode disables regulator output, allowing other receivers to control the down converters.
· Output reverse current is limited in standby mode.
· A8281SLB: 16-lead SOIC package, output set to 13 or 18V.
· A8282SLB: 24-lead SOIC package, output set to 12, 13, 18, or 20V with cable drop compensation.
· Internally-fused leads for enhanced thermal dissipation, no electrical isolation needed.

FEATURES

· LNB selection and standby function.
· Built-in 22kHz tone oscillator for DiSEqC™ encoding.
· Tracking switch-mode power converter for low dissipation.
· Externally adjustable short-circuit protection.
· LNB short-circuit protection and diagnostics.
· Auxiliary modulation input.
· Internal over-temperature protection.
· Reverse-current protection.
· Cable length compensation (A8282SLB only).

APPLICATIONS

· Analog and digital satellite receivers.
· Low-noise block converter (LNB) power supply and control.
· Systems requiring voltage regulation via coaxial cable.
· Satellite receivers sharing a single coaxial cable.