Features and Benefits
▪ Integrated boost MOSFET, current sensing, and
compensation
▪ 704 kHz switching frequency for small low-cost
components
▪ S¯¯L¯¯E¯¯E¯¯P pin for ultra-low power consumption mode
▪ Adjustable LNB output current limit (250 to 950 mA*)
limit with shutdown timer
▫ Covers wide array of application requirements
▫ Minimizes component sizing to fit each application
▫ For startup, reconfiguration, and continuous output
▪ Boost peak current limit scales with LNB current limit
▪ Optional temporary increased current limit (+25%)
▪ Compatible with DiSEqC1.x control
Description
The A8304 is a single channel low noise block regulator
(LNBR). The A8304 consists of a monolithic boost converter
followed by a low-drop linear regulator. It is specifically
designed to provide the power and the interface signals to an
LNB down converter via coaxial cable in satellite TV receiver
systems.
The A8304 requires few external components, with the boost
switch and compensation circuitry integrated inside of the
device. The 704 kHz switching frequency and user-controlled
output current limit minimize the size of the passive filtering
components.
The I2C™-compatible interface provides control capabilities for
complex system requirements, as well as diagnostic capabilities
for system fault reporting.
A sleep pin is available to maximize power savings and to
quickly shut down the device if needed, without using I2C™
control.
The A8304 is provided in a small 3 × 3 mm QFN package with
exposed pad for thermal dissipation. It is lead (Pb) free, with
100% matte tin leadframe plating