MAX1993

Quick-PWM降压型控制器,带有电感饱和保护和动态输出电压

Quick-PWM降压控制器,具有电感饱和保护,可动态调节输出电压


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说明

MAX1992/MAX1993脉宽调制(PWM)控制器提供高效率,出色的瞬态响应和较高的直流输出精度。该器件降压高电池电压,产生笔记本电脑所需的低压CPU核电源或芯片组/RAM电源。

Maxim专有的Quick-PWM™快速响应、固定导通时间的PWM控制模式可以轻松地处理宽输入/输出电压比,并对负载瞬变提供100ns的持续导通时间,同时保持相对固定的开关频率。其具备驱动较大同步整流MOSFET的能力提高了电源转换效率。通过串接在输出上的检流电阻,提供了电流检测,以保证可靠的过载和电感饱和保护。另一种方式,控制器还可以检测只流过同步整流器上的电流,或采用无损耗电感电流检测,以达到最低的功率消耗。

一次buck转换允许MAX1992/MAX1993直接从高电池电压降压,以达到尽可能高的转换效率;另一种方式,工作于更高开关频率的两次转换(降压电源来自其它系统电源,而不是电池)允许尽可能小的物理尺寸。

MAX1992提供CPU内核、芯片组、DRAM或其他低至0.7V的电源。MAX1993提供芯片组,以及那些要求动态可调输出电压的图像处理器内核电源。MAX1993提供用于有源终端匹配总线的跟踪输入电源。MAX1992/MAX1993采用24引脚薄型QFN封装,且具有可选的过压/欠压保护。

对于要求具有电感饱和保护、外部基准输入和动态可调输出电压的双路降压PWM控制器,请参考MAX1540/MAX1541的数据资料。
MAX1992、MAX1992ETG、MAX1993:典型工作电路 MAX1992、MAX1992ETG、MAX1993:典型工作电路 放大+

关键特性

  • 电感饱和保护
  • 精确的电流限制
  • 超高效率
  • 具有100ns负载阶跃响应的Quick-PWM
  • MAX1992
    • 1.8V/2.5V固定输出,或0.7V至5.5V可调输出
  • MAX1993
    • 外部基准输入
    • 动态可调的输出电压(0.7V至5.5V)
    • 突变过程中可选的电源就绪和故障屏蔽
  • 在整个电源输入和负载范围内,达到了±1% VOUT精度
  • 2至28V电池电压输入范围(VIN)
  • 200/300/450/600kHz开关频率
  • 过压/欠压保护方式
  • 1.7ms数字软启动
  • 驱动大功率同步整流FET
  • 2V ±0.7%基准输出
  • 电源就绪区间比较器

应用

  • 1.8V与2.5V电源
  • 有源端接总线(MAX1993)
  • 核/IO电源,可低至0.7V
  • 具有动态电压核的CPU/芯片组/GPU
  • DDR存储器端接(MAX1993)
  • 笔记本电脑

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX1993EVKIT: MAX1992、MAX1993评估板
申请可靠性报告: MAX1993 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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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类型 编号 标题
评估板3779MAX1993EVKIT MAX1992、MAX1993评估板