数据手册MAX1718 .pdf [英文Rev.4(PDF,1.1MB)]

{状况:生产中。}

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 corresponding to 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.

产品关键特性
  • 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
应用与使用范围
  • 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
典型工作电路

芯片订购型号
订购型号产品状态封装形式工作温度RoHS/无铅
MAX1718BEEI生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1718BEEI+生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1718BEEI+T生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1718BEEI-T生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1718EEI生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1718EEI+生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1718EEI+T生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:无铅材料分析
MAX1718EEI-C71059生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
MAX1718EEI-T生产中QSOP;28引脚;61.9mm²封装信息-40°C至+85°CRoHS/无铅:否材料分析
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