MAX38888

用于备用电源应用的2.5V-5.0V,0.5A / 2.5A可逆降压/升压稳压器

Continua 系列备用电源稳压器,采用超级电容器或电容器组


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说明

MAX38888为超级电容备份调节器,设计用于在超级电容和系统电源轨之间高效传输电源。

有主电池且主电源高于最低系统电源电压时,调节器对超级电容进行充电,充电电流可达500mA。超级电容充电之后,电路仅吸收2.5μA电流,同时超级电容保持在就绪状态。主电池移除后,调节器可防止系统下降到最低工作电压以下,以高达2.5A的速率对超级电容进行放电。

MAX38888可通过外部编程设置超级电容最小和最大电压、最低系统电压、最大充电和放电电流。内部DC/DC转换器仅需要1μH电感。

MAX38888: Typical Operating Circuit MAX38888: Typical Operating Circuit 放大+

关键特性

  • 2.5V至5V系统输出电压
  • 0.8V至5V超级电容电压范围
  • 高达2.5A峰值放电电流
  • 可编程电压及电流门限
  • ±2%门限精度
  • 效率高达95%,包括充电或放电
  • 2.5μA就绪静态电流
  • 较小方案尺寸
  • 3mm x 3mm x 0.75mm TDFN封装

应用

  • 手持式工业设备
  • 便携式计算机
  • 具有可拆卸电池的便携式设备
Part NumberLithium Ion CellsCharging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationDesign ToolsOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX38888 15.5Preset0.28Max. VoltageSwitchmodeEE-Sim-40 to +125
TDFN-CU/14
$2.98 @1k
查看所有Battery Chargers (74)
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。


MAX38888EVKIT: MAX38888 评估板

质量和环境数据

申请可靠性报告: MAX38888 
无铅封装的锡(Sn)晶须报告

其它资源

Super Capacitor Calculator (XLSM)


工具和模型

  • EE-Sim: MAX38888 设计和仿真
  • CAD Symbols and Footprints

  • MAX38888ATD+
  • MAX38888ATD+T
  • 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。

    质量管理体系 >
    环境管理体系 >

     
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