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开关电容倍压器

SOT23倍压电路,仅需要两个外部电容,为PDA、蜂窝电话提供超小尺寸的LCD电源

产品详情

主要特征

应用/用途

Parametric specs for Charge Pumps
Topology Doubler
Unregulated
VIN (V) (min) 2
VIN (V) (max) 5.5
IOUT (A) (typ) 0.045
Unadj. VOUT (V) +2xVIN
ICC (mA) (max) 0.31
Switching Frequency (kHz) 35
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
0.8
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简化框图

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参量

Parametric specs for Charge Pumps
Topology Doubler
Unregulated
VIN (V) (min) 2
VIN (V) (max) 5.5
IOUT (A) (typ) 0.045
Unadj. VOUT (V) +2xVIN
ICC (mA) (max) 0.31
Switching Frequency (kHz) 35
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
0.8

主要特征

  • 5-Pin SOT23 Package
  • +2.0V to +5.5V Input Voltage Range
  • 98% Voltage-Conversion Efficiency
  • 110µA Quiescent Current (MAX1682)
  • Requires Only Two Capacitors
  • Up to 45mA Output Current

应用/用途

  • 蜂窝电话
  • 手持终端
  • PDA
  • 小型LCD板

描述

The ultra-small MAX1682/MAX1683 monolithic, CMOS charge-pump voltage doublers accept input voltages ranging from +2.0V to +5.5V. Their high voltage-conversion efficiency (over 98%) and low operating current (110µA for MAX1682) make these devices ideal for both battery-powered and board-level voltage-doubler applications.

Oscillator control circuitry and four power MOSFET switches are included on-chip. The MAX1682 operates at 12kHz, and the MAX1683 operates at 35kHz. A typical application includes generating a 6V supply to power an LCD display in a hand-held PDA. Both parts are available in a 5-pin SOT23 package and can deliver 30mA with a typical voltage drop of 600mV.

简化框图

MAX1682、MAX1683:典型工作电路 MAX1682、MAX1683:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

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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