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Maxim产品 - MAX1717介绍

MAX1717 - 动态可调、同步降压型控制器，用于笔记本CPU

MAX1717是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1717是动态可调、同步降压型控制器，用于笔记本CPU，本站介绍了MAX1717的封装应用图解、特点和优点、功能等，并给出了与MAX1717相关的Maxim元器件型号供参考。

MAX1717 - 动态可调、同步降压型控制器，用于笔记本CPU - DC-DC开关调节器 - 业内首款单芯片、Intel SpeedStep CPU供电方案 - 美信半导体

产品概述

The MAX1717 step-down controller is intended for core CPU DC-DC converters in notebook computers. It features a dynamically adjustable output, ultra-fast transient response, high DC accuracy, and high efficiency needed for leading-edge CPU core power supplies. Maxim's proprietary Quick-PWM™ quick-response, constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns Instant-on" response to load transients while maintaining a relatively constant switching frequency.

The output voltage can be dynamically adjusted through the 5-bit digital-to-analog converter (DAC) inputs over a 0.925V to 2V range. A unique feature of the MAX1717 is an internal multiplexer (mux) that accepts two 5-bit DAC settings with only five digital input pins. Output voltage transitions are accomplished with a proprietary precision slew-rate control that minimizes surge currents to and from the battery while guaranteeing "just-in-time" arrival at the new DAC setting.

High DC precision is enhanced by a two-wire remote-sensing scheme that compensates for voltage drops in the ground bus and output voltage rail. Alternatively, the remote-sensing inputs can be used together with the MAX1717's high DC accuracy to implement a voltage-positioned circuit that modifies the load-transient response to reduce output capacitor requirements and full-load power dissipation.

Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.

The MAX1717 is available in a 24-pin QSOP package.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Quick-PWM Architecture
  • ±1% VOUT Accuracy Over Line and Load
  • 5-Bit On-Board DAC with Input Mux
  • Precision-Adjustable VOUT Slew Control
  • 0.925V to 2V Output Adjust Range
  • Supports Voltage-Positioned Applications
  • 2V to 28V Battery Input Range
  • Requires a Separate +5V Bias Supply
  • 200/300/550/1000kHz Switching Frequency
  • Over/Undervoltage Protection
  • Drives Large Synchronous-Rectifier FETs
  • 700µA (typ) ICC Supply Current
  • 2µA (typ) Shutdown Supply Current
  • 2V ±1% Reference Output
  • VGATE Transition-Complete Indicator
  • Small 24-Pin QSOP Package
    • 热门应用
  • 从2节至4节Li+电池产生CPU核电源的转换器
  • 5V至CPU核电源转换器
  • 带有Intel SpeedStep®或其它动态可调处理器的笔记本电脑
    • 下面可能是您感兴趣的美信半导体公司DC-DC开关调节器元器件
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