MAX1672

升/降压型DC-DC转换器,QSOP封装

紧凑的低噪声、无变压器升/降压调节器,仅使用一只电感,具有低输出纹波


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说明

The MAX1672 integrates a step-up DC-DC converter with a linear regulator to provide step-up/down voltage conversion. This device provides a constant output voltage for inputs that vary above and below the output voltage. It has a 1.8V to 11V input range and a preset 3.3V or 5V output. The output can also be set from 1.25V to 5.5V using two resistors. Typical efficiency is 85%.

The MAX1672's step-up/linear-regulator configuration permits the use of a single, physically smaller inductor than can be used with competing SEPIC and flyback configurations. Switch current is also selectable, permitting the use of smaller inductors in low-current applications. The linear regulator also acts as a filter to reduce output ripple voltage.

The MAX1672 has a low 85µA quiescent supply current, which is further reduced to 0.1µA in logic-controlled shutdown. The output voltage is disconnected from the input in shutdown. The MAX1672 also has a PGI/PGO-bar low-battery detector.

The MAX1672 comes in a 16-pin QSOP package (same size as a standard 8-pin SO). For a larger device that delivers more output current, refer to the MAX710/MAX711. The preassembled MAX1672 evaluation kit is available to speed designs.
MAX1672:典型工作电路 MAX1672:典型工作电路 放大+

关键特性

  • Step-Up/Down Voltage Conversion
  • 1.8V to 11V Input Range
  • 3.3V/5V or Adjustable Output Voltage Range
  • Output Current:
    • 300mA at 5V (VIN > 2.5V)
    • 150mA at 5V (VIN > 1.8V)
  • Smaller Inductor than SEPIC and Flybacks
  • Load Disconnects from Input in Shutdown
  • Supply Current from Battery:
    • 85µA (No-Load)
    • 0.1µA (Shutdown)
  • PGI/PGO-bar Low-Battery Comparator
  • 16-Pin QSOP Package (Same Footprint as 8-pin SO)
  • No External FETs Required
  • Thermal and Short-Circuit Protection

应用

  • 2节至4节AA碱性电池供电的手持设备
  • 3.3V及其它低电压系统
  • 电池供电设备
  • 数码相机
  • 带有交流适配器输入的单节锂电池供电便携设备
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypePower Good SignalDC-DC OutputsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1672 1.8111.255.5
3.3
5
Preset
Resistor
0.26InternalYes1
QSOP/16
$3.01 @1k
查看所有Step-Down Switching Regulators (380)
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。


MAX1672EVKIT: MAX1672评估板

技术资料

应用笔记 1763 Dual-Voltage Supply Powers SIM Card

质量和环境数据

产品可靠性报告: MAX1672.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX1672EEE+
  • MAX1672EEE+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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    类型 编号 PDF 标题
    应用笔记 1763 Dual-Voltage Supply Powers SIM Card
    类型 编号 标题
    评估板1808MAX1672EVKIT MAX1672评估板