Single LNB regulator IC raises switching frequency, cuts power
The new device is a monolithic linear and switching voltage regulator which is specifically designed to provide the power and interface signals to an LNB down-converter via coaxial cable. The A8304 requires few external components, with the boost switch and compensation circuitry integrated into the device. The 704 kHz switching frequency and user-controlled output current limit minimise the size of the passive filtering components.
An I2C-compatible interface provides control capabilities for complex system requirements, as well as diagnostic information for system fault reporting. A “sleep” pin is also available to maximise power savings and to quickly shut down the device if required, without using I2C control. New control features for output source and sink current are also incorporated. The A8304SESTR-T is housed in a 3 x 3 mm QFN package (suffix ES) with exposed pad for thermal dissipation.
Allegro Microsystems; www.allegromicro.com/en/Products/Regulators-And-Lighting/LNB-Regulators-For-Satellite-Set-Top-Boxes/A8304.aspx
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