MAX1712

高速、数字可调、降压型控制器,用于笔记本电脑

数字可调节降压控制器,只需四个输出电容即可为移动处理器提供12A电流


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说明

The MAX1710/MAX1711 step-down controllers are intended for core CPU DC-DC converters in notebook computers. They feature a triple-threat combination of 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.

High DC precision is ensured by a 2-wire remote-sensing scheme that compensates for voltage drops in both the ground bus and supply rail. An on-board, digital-to-analog converter (DAC) sets the output voltage in compliance with Mobile Pentium II® CPU specifications.

The MAX1710 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronous-rectifier MOSFETs.

Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, 2-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.

The MAX1710/MAX1711 are identical except that the MAX1711 have 5-bit DACs and the MAX1710 has a 4-bit DAC. Also, the MAX1711 has a fixed overvoltage protection threshold at VOUT = 2.25V and undervoltage protection at VOUT = 0.8V whereas the MAX1710 has variable thresholds that track VOUT. The MAX1711 is intended for applications where the DAC code may change dynamically.
MAX1710、MAX1711、MAX1712:典型工作电路 MAX1710、MAX1711、MAX1712:典型工作电路 放大+

关键特性

  • Ultra-High Efficiency
  • No Current-Sense Resistor (Lossless ILIMIT)
  • Quick-PWM with 100ns Load-Step Response
  • ±1% VOUT Accuracy over Line and Load
  • 4-Bit On-Board DAC (MAX1710)
  • 5-Bit On-Board DAC (MAX1711/MAX1712)
  • 0.925V to 2V Output Adjust Range (MAX1711/MAX1712)
  • 2V to 28V Battery Input Range
  • 200/300/400/550kHz Switching Frequency
  • Remote GND and VOUT Sensing
  • Over/Undervoltage Protection
  • 1.7ms Digital Soft-Start
  • Drive Large Synchronous-Rectifier FETs
  • 2V ±1% Reference Output
  • Power-Good Indicator
  • Small 24-Pin QSOP Package

应用

  • CPU核DC-DC转换器
  • 坞站
  • 笔记本电脑
  • 单级(电池至VCORE)变换器
  • 两级(+5V至VCORE)变换器
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/Pins
minmaxminmax
MAX1711 2280.9252Digital/VID7ExternalYes1550
DICE SALES
QSOP/24
查看所有Step-Down Switching Regulators (388)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1711EVKIT: MAX1711电压定值的评估板
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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