ARG81300中文资料ARG81300: Single LNB Supply and Control Voltage Regulator数据手册Allegro规格书

描述 Description

The ARG81300 is a single-channel low-noise block regulator (LNBR). The ARG81300 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 ARG81300 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 ARG81300 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.

特性 Features

•Integrated boost MOSFET, current sensing, and compensation
•Stable with low-profile ceramic boost capacitors
•704 kHz switching frequency for small low-cost components
•SLEEP pin for ultralow power consumption mode
•Adjustable LNB output current limit (250 to 950 mA*) 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
•2-wire I2C™-compatible interface for control and status•Programmable LNB output voltage levels (2% accuracy)
•Enable/disable output
•Flexible 22 kHz tone generation methods
•SINK_DIS bit for controlling the push-pull output sink current threshold

•Diagnostic features: PNG
•Extensive protection features: UVLO, OCP, TSD
•Cable disconnect detect
* maximum value depends on PCB thermal design

简介

ARG81300属于集成电路（IC）的线性稳压器控制器。由制造生产的ARG81300稳压器 - 线性 + 开关此产品族中的产品用于构建执行 DC-DC 转换或电压调节功能的电路，采用的是开关模式和线性稳压器功能的组合。虽然具体的拓扑各不相同，但此类产品的主要目的是将开关模式技术的效率优势与线性稳压技术的低噪声特性结合在一起。