A8302 Datasheet | Allegro MicroSystems

Dual LNB Supply and Control Voltage Regulators Features AND BENEFITS - Integrated boost MOSFET, current sensing, and pensation - Configurable boost capacitor option through I2C™ control register: ceramic or electrolytic - Two switching frequency settings programmable through I2C™ control register (563 k Hz and 939 k Hz) - Adjustable LNB output current limit from 250 to 950 m A ▫ Covers a wide array of application requirements ▫ Minimizes ponent sizing to fit each application ▫ For startup, reconfiguration, and continuous output ▫ Optional temporary increased current limit (+25%) ▫ Internal gate drive output BFGATEx for bypass FET used in Di SEq C™ applications Continued on the next page… PACKAGE: 32-contact MLP/QFN with exposed thermal pad (suffix ET) DESCRIPTION The A8302 is a dual-channel low-noise block converter regulator (LNBR). The A8302 consists of a monolithic linear and switching voltage regulator, specifically designed to provide the power and the interface signals to an LNB down converter via coaxial cable in satellite TV receivers systems. The A8302 requires few external ponents, with the boost switch and pensation circuitry integrated inside of the device. The boost converter switching frequency and user-controlled current limit minimize the size of the passive filtering ponents. User controlled current limit and two switching frequency settings allow to optimize size of passive filtering ponents. A sleep pin is available to maximize power savings and to quickly shut down the device if needed, without using I2C™ control. The A8302 has integrated tone detection capability and the internal driver allows full two-way Di SEq C™ munications. For Di SEq C™ munication, the IC provides an internal 22 k Hz tone that is gated with the TONECTRLx pin or accepts an external 22 k Hz tone through the TONECTRLx pin. 5 mm × 5 mm × 0.90 mm not to scale Continued on the next page… 8302-DS, Rev. 2 MCO-0000861 Functional Block Diagram (One of two...