MAX1730

50mA、稳压型、降压型电荷泵,用于1.8V或1.9V逻辑电路


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说明

The MAX1730 regulated step-down charge pump generates up to 50mA at fixed output voltages of 1.8V or 1.9V from an input voltage in the 2.7V to 5.5V range. Specifically designed to provide high-efficiency logic supplies in applications that demand a compact design, the MAX1730 employs fractional conversion techniques to provide efficiency exceeding that of a linear regulator.

The MAX1730 operates at up to 2MHz, permitting the use of small 0.22µF flying capacitors while maintaining low 75µA quiescent supply current. Proprietary soft-start circuitry prevents excessive current from being drawn from the supply during startup, making the MAX1730 compatible with higher impedance sources such as alkaline and lithium-ion cells.

The MAX1730 is available in a space-saving 10-pin µMAX® package that is only 1.09mm high and occupies one-half the area of an 8-pin SO.
MAX1730:典型工作电路 MAX1730:典型工作电路 放大+

关键特性

  • > 85% Peak Efficiency
  • 50mA Guaranteed Output Current
  • Dual-Mode 1.8V or 1.9V Output
  • ±3% Output Voltage Accuracy
  • Up to 2MHz Operating Frequency
  • Small 0.22µF Capacitors
  • No Inductor Required
  • 2.7V to 5.5V Input Voltage Range
  • Output Disconnects from Input in Shutdown Mode
  • Small 10-Pin µMAX Package (1.09mm max height)

应用

  • 手持式仪表(PDA、掌上电脑)
  • 低电压逻辑电源
  • PC卡
  • PDA
  • 无线手机

请查看具体的参数规格 Charge Pumps (46)


Part NumberTopologyVIN
(V)
VIN
(V)
ICC
(mA)
Unadj. VOUT
(V)
IOUT
(A)
Oper. Freq.
(kHz)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
(min)(max)(max)(typ)(See Notes)
MAX1730 Regulated2.75.50.15
1.8
1.9
0.052000-40 to +85
UMAX/10
$1.52 @1k

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。

技术资料

应用笔记 3741 用于低压系统的模拟IC
应用笔记 1876 Doubler/Inverter Charge Pumps Divide by Two
申请可靠性报告: MAX1730 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

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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相关资料


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8A Dual-Phase Switched-Capacitor Converter

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类型 编号 标题
应用笔记 3741 用于低压系统的模拟IC
应用笔记 1876 Doubler/Inverter Charge Pumps Divide by Two