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Maxim产品 - MAX1718介绍

MAX1718 - 笔记本电脑CPU降压型控制器，用于Intel移动电压定位(IMVP-II)

MAX1718是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1718是笔记本电脑CPU降压型控制器，用于Intel移动电压定位(IMVP-II)，本站介绍了MAX1718的封装应用图解、特点和优点、功能等，并给出了与MAX1718相关的Maxim元器件型号供参考。

MAX1718 - 笔记本电脑CPU降压型控制器，用于Intel移动电压定位(IMVP-II) - DC-DC开关调节器 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

The MAX1718 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) over a 0.6V to 1.75V range. The MAX1718 has an internal multiplexer that accepts three unique 5-bit VID DAC codes correspondingto Performance, Battery, and Suspend modes. Precision slew-rate control provides "just-in-time" arrival at the new DAC setting, minimizing surge currents to and from the battery.

The internal DAC of the MAX1718B is synchronized to the slew-rate clock for improved operation under aggressive power management of newer chipsets and operating systems that can make incomplete mode transitions.

A pair of complementary offset control inputs allows easy compensation for IR drops in PC board traces or creation of a voltage-positioned power supply. Voltage-positioning modifies the load-transient response to reduce output capacitor requirements and total system 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 MAX1718 is available in a 28-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 Muxes
  • Precision-Adjustable VOUT Slew Control
  • 0.6V to 1.75V Output Adjust Range
  • Precision Offset Control
  • 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 Blanking During Transition
  • Small 28-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
  • IMVP-II笔记本电脑
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