MAX8537

双路同步buck控制器,用于负载点、跟踪和DDR存储器供电


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说明

MAX8537/MAX8539控制器为双数据速率(DDR)和组合器电源提供了一个完整的电源管理方案。MAX8537和MAX8539分别配置为反相和同相DDR电源工作模式,产生三个输出:主存储器电压(VDDQ)、跟踪吸收/供出终结电压(VTT)和终结参考电压(VTTR)。MAX8538配置为双组反相控制器,适用于负载点电源。每个buck控制器能够供出和吸收高达25A电流,终结基准能够提供15mA输出。

MAX8537/MAX8538/MAX8539使用恒定频率电压模式结构,工作频率为200kHz至1.4MHz。内部高带宽(25MHz)运放用作误差放大器调节输出电压。提供快速瞬态响应,减少了输出电容的数量。全N沟道FET设计优化了效率和成本。MAX8537/MAX8538/MAX8539具有1%精密基准。MAX8537/MAX8539中的第二个同步buck控制器和VTTR放大器为VTT和VTTR产生1/2 VDDQ电压,并以±1%的精度跟踪VDDQ

这些控制器使用高侧电流检测结构限流。利用ILIM引脚,用户可以根据不同的负载电流和RDSON组合,调解无损电流限。作为另外一种选择,为了提供更精确的过流保护,还可以使用一个与高侧FET串联的检流电阻。当输出电压超过设定值的17%时,过压保护功能锁定高侧MOSFET为关断状态,锁定低侧MOSFET为开通状态。单独使能、电源就绪和软启动功能提高了设计的灵活性。
MAX8537、MAX8538、MAX8539:引脚配置 MAX8537、MAX8538、MAX8539:引脚配置 放大+

关键特性

  • MAX8537/MAX8539:完整的DDR电源
  • MAX8538:双路非跟踪控制器
  • 反相(MAX8537/MAX8538)或者同相(MAX8539)工作
  • 4.5V至23V宽输入范围(外加5V电源时可工作于最低至1.8V输入)
  • 跟踪电源保证VTT = VTTR = 1/2 VDDQ
  • 可调输出从0.8V至3.6V,1%精度
  • VTTR参考可供出和吸收高达15mA
  • 200kHz至1.4MHz可调开关频率
  • 全陶瓷设计
  • 效率>90%
  • 单独的 POK_和EN_
  • 每个输出具有可调的软启动和软关断
  • 无损、可调节、打嗝式电流限制
  • 输出过压保护
  • 28引脚QSOP封装

应用

  • 宽带路由器
  • DDR存储器电源
  • 网络系统
  • 笔记本电脑与台式笔记本
  • 高级VGA卡组合电源
  • DSP核供电电源
  • RAMBUS存储器电源
  • 服务器与存储系统
  • xDSL调制解调器和路由器
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX8537 4.5230.83.6Resistor30ExternalYesYes21400
QSOP/28
$2.70 @1k
MAX8538 
QSOP/28
查看所有Step-Down Switching Regulators (402)
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。


MAX8537EVKIT: MAX8537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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类型 编号 标题
评估板5083MAX8538EVKIT MAX8538评估板
评估板4370MAX8537EVKIT MAX8537评估板