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