DESCRIPTION

· Monolithic linear and switching voltage regulators for LNB down converters in satellite receivers.
· Designed to power and interface with LNB down converters via coaxial cable.
· Standby mode disables regulator output, allowing other receivers to control the down converter.
· Reverse current limiting in standby mode.
· A8281SLB: 16-pin SOICW, output set to 13 or 18V by VSEL terminal.
· A8282SLB: 24-pin SOICW, output set to 12, 13, 18, or 20V by VSEL terminals, with 1V cable drop compensation.
· Internally-fused leads for enhanced thermal dissipation, no electrical isolation needed.
· Lead-free version with 100% matte tin leadframe plating.

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.
· Power and control of LNB down converters via coaxial cable.
· Systems requiring multiple satellite receivers sharing a single coaxial cable.
· Applications needing voltage regulation with cable drop compensation.