MAX8815A

1A、97%效率、30µA静态电流、升压转换器,具有真关断

效率最高的1A输出boost转换器


点击查看特定型号的库存状况。

说明

MAX8815A DC-DC升压转换器是一款高效、低静态电流、具备True Shutdown™和浪涌电流限制的同步升压转换器。MAX8815A可以从2节NiMH/NiCd电池或单节锂离子/锂聚合物电池产生3.3V至5V的输出。

MAX8815A采用两种模式工作。第一种工作模式(正常)仅消耗30µA (典型值)的静态电流。在空载或轻载状态下,允许转换器仅在需要时开启工作;负载加大或重载时(典型值大于90mA),MAX8815A采用固定频率脉宽调制(PWM)技术。该模式在轻载时可获得最高效率。第二种工作模式是固定频率强制脉宽调制(FPWM)方式,即不管负载多大,转换器均工作在固定频率。该模式易于实现噪声滤除以及降低输出纹波。

MAX8815A具有预设的2.5A电流限制,当输出设置为5V时,1.8V输入能提供500mA负载电流、2.5V输入能提供1A负载电流。该器件具有软启动功能,限制启动过程中的浪涌电流;其它特性还包括:True Shutdown功能以及内部补偿。MAX8815A采用紧凑的10引脚、3mm x 3mm TDFN封装。

MAX8815A评估板可用来缩短系统设计时间。
MAX8815:典型应用电路 MAX8815:典型应用电路 放大+

关键特性

  • 效率高达97%,带有内部同步整流器
  • 30µA低静态电流
  • 1.8V输入、VOUT = 5V时保证500mA输出电流
  • 2.5V输入、5V时保证1A输出电流
  • 低噪声固定频率工作模式(FPWM模式)
  • 2MHz PWM开关频率
  • 预设(5V)或可调节输出
  • 采用软启动控制电流,限制了浪涌电流
  • True Shutdown功能
  • 内部补偿
  • 过载/短路保护
  • 0.1µA关断电流
  • 热关断功能
  • 紧凑的10引脚、3mm x 3mm TDFN封装

应用

  • 蜂窝电话、PDA、MP3播放器
  • DSC和DVC
  • 微处理器/DSP核供电
  • PCMCIA卡
  • 便携式手持设备
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeSynchronous SwitchingICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX8815A 1.25.51.2655.51ResistorInternalYes0.030.1112000
TDFN/10
$1.23 @1k
查看所有Step-Up Switching Regulators (97)
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。


MAX8815AEVKIT: MAX8815A评估板

工具和模型

  • MAX8815A PSPICE宏模型
  • CAD Symbols and Footprints

  • MAX8815AETB+
  • MAX8815AETB+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。

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