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串-并/并-串转换器及负载开关控制器,带有SMBus接口

SMBus接口控制,简化电源板切换

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主要特征

简化框图

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主要特征

  • Performs Serial-to-Parallel and Parallel-to-Serial Conversions
  • Three General-Purpose Digital Input/Output Pins (withstand +28V)
  • SMBus 2-Wire Serial Interface
  • Supports SMBSUS-bar Asynchronous Suspend Mode
  • 3µA Supply Current
  • +2.7V to +5.5V Supply Range
  • Space-Saving, Low-Cost 10-Pin µMAX Package

应用/用途

  • 计算机:台式机、工作站和服务器
  • 笔记本电脑和亚笔记本电脑
  • 负载点电源总线切换
  • 电源板开关
  • 智能电池组/充电器

描述

The MAX1661/MAX1662/MAX1663 serial-to-parallel/parallel-to-serial converters are intended to control external power MOSFETs in power-plane switching applications. These small, low-cost devices can be used on a system motherboard to control point-of-load switching from a 2-wire SMBus™ serial interface. Each device has three high-voltage open-drain outputs that double as TTL-level logic inputs, giving them bidirectional capabilities. The I/O pins can withstand +28V, so they can control battery voltage-distribution switches in notebook computers.

The MAX1661 is intended for driving N-channel MOSFETs and its outputs are low upon power-up. The MAX1662/MAX1663 are intended for P-channel MOSFETs, and their outputs are high-impedance upon power-up. This ensures that the MOSFETs are off at power-up, so the system can enforce power-plane sequencing.

The active-low SMBSUS control input selects control data between two separate data registers. This feature allows the system to select between two different power-plane configurations asynchronously, eliminating latencies introduced by the serial bus. Other features include thermal-overload and overcurrent protection, ultra-low supply current, and both hardware and software interrupt capabilities. These devices are available in the space-saving 10-pin µMAX® package.

简化框图

MAX1661、MAX1662、MAX1663:典型工作电路 MAX1661、MAX1662、MAX1663:典型工作电路 Zoom icon

Technical Docs

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