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50mA、稳压型、降压型电荷泵,用于1.8V或1.9V逻辑电路

产品详情

主要特征

应用/用途

Parametric specs for Charge Pumps
Topology Regulated
VIN (V) (min) 2.7
VIN (V) (max) 5.5
IOUT (A) (typ) 0.05
Unadj. VOUT (V) 1.8
1.9
ICC (mA) (max) 0.15
Switching Frequency (kHz) 2000
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.61
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参量

Parametric specs for Charge Pumps
Topology Regulated
VIN (V) (min) 2.7
VIN (V) (max) 5.5
IOUT (A) (typ) 0.05
Unadj. VOUT (V) 1.8
1.9
ICC (mA) (max) 0.15
Switching Frequency (kHz) 2000
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/10
Budgetary
Price (See Notes)
1.61

主要特征

  • > 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/用途

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

描述

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.

简化框图

MAX1730:典型工作电路 MAX1730:典型工作电路 Zoom icon

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心