MAX8574

高效LCD boost电路,可真正关断

首款提供完备保护的LCD、OLED电源,SOT23封装


点击查看特定型号的库存状况。

说明

MAX8570系列LCD升压转换器采用内部n沟道开关和p沟道输出隔离开关。这些转换器采用2.7V至5.5V的电源电压,输出可达28V。

独一无二的控制技术能够在各种负载条件下提供最高的转换效率。内部MOSFET开关减少了外部元件的数量,高开关频率(800kHz)允许使用微小的表面贴封装元件。具有三种电流限制选项,MAX8570和MAX8572采用110mA的电流限制以减小低电流应用中的波纹干扰和元件尺寸。对于大功率应用,MAX8574和MAX8575使用500mA电流限制,在20V时可提供20mA电流。MAX8571和MAX8573采用250mA的电流限制,以便在波纹干扰和功耗指标间取得平衡。内部保护电路在发生故障时保护内部开关和后续元件。

其他的特性还包括低静态电流和省电的True Shutdown™模式。MAX8570/MAX8571/MAX8574可以让用户在3V至28V之间设置输出电压,MAX8572/MAX8573/MAX8575有一个预设的15V输出。这些升压转换器十分适合要求低电流的小尺寸LCD显示器及其他应用。MAX8571备有评估板,有助于加快设计进程。
MAX8570、MAX8571、MAX8572、MAX8573、MAX8574、MAX8575:典型应用电路 MAX8570、MAX8571、MAX8572、MAX8573、MAX8574、MAX8575:典型应用电路 放大+

关键特性

  • 15V或可调节输出电压,最高达28V
  • 安全特性在输出故障时进行保护
  • 单节Li+电池供电,提供20V电源时,电流可达20mA
  • True Shutdown
  • 87%的效率
  • 800kHz开关频率
  • 小尺寸、6引脚SOT23封装和µDFN (MAX8570)封装

应用

  • 蜂窝电话/无绳电话
  • 手持终端
  • LCD偏置发生器
  • 数字助理
  • 掌上电脑
  • PDA及其它手持设备
  • 聚合物LED (OLED)
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX8570 2.75.52.728-0.01ResistorInternal0.0250.0511
SOT23/6
UDFN/6
$1.34 @1k
MAX8571 2.728-0.015Resistor
SOT23/6
MAX8572 1515150.01Preset
SOT23/6
MAX8573 1515150.015Preset
SOT23/6
MAX8574 2.728-0.025Resistor
SOT23/6
MAX8575 1515150.025Preset
SOT23/6
查看所有Step-Up Switching Regulators (98)
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。


MAX8571EVKIT: MAX8570、MAX8571、MAX8572、MAX8573、MAX8574、MAX8575评估板

技术资料

应用笔记 4499 Miniature Circuit Converts Negative Inputs to Positive Outputs

质量和环境数据

申请可靠性报告: MAX8574 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX8574EUT+
  • MAX8574EUT+T
  • MAX8574EUT-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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