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SOT23封装、开关电容电压反相器,带有关断

尺寸最小的高效偏置电源,用于小型LCD/GaAsFET PA偏置电源: 小尺寸、无需电感、低电源电流

产品详情

The ultra-small MAX1719/MAX1720/MAX1721 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX1720 operates at 12kHz, and the MAX1719/MAX1721 operate at 125kHz. High efficiency, small external components, and logic-controlled shutdown make these devices ideal for both battery-powered and board-level voltage conversion applications.

Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.

For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 deliver up to 50mA. For regulated outputs (up to -2 x VIN), refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX® packages.

主要特征

  • 1nA Logic-Controlled Shutdown
  • 6-Pin SOT23 Package
  • 99.9% Voltage Conversion Efficiency
  • 50µA Quiescent Current (MAX1720)
  • +1.5V to +5.5V Input Voltage Range
  • 25mA Output Current
  • Requires Only Two 1µF Capacitors (MAX1719/MAX1721)

应用/用途

  • 电池供电应用
  • GaAs PA偏置电源
  • 手持终端、PDA
  • 从正电源产生本地负电源
  • 小型LCD板
Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 1.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.025
Unadj. VOUT (V) -VIN
ICC (mA) (max) 0.65
Switching Frequency (kHz) 125
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$0.75 @1k
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简化框图

MAX1719、MAX1720、MAX1721:典型工作电路 MAX1719、MAX1720、MAX1721:典型工作电路 Zoom icon

技术文档

设计与质量

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参量

Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 1.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.025
Unadj. VOUT (V) -VIN
ICC (mA) (max) 0.65
Switching Frequency (kHz) 125
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/6
Budgetary
Price (See Notes)
$0.75 @1k

主要特征

  • 1nA Logic-Controlled Shutdown
  • 6-Pin SOT23 Package
  • 99.9% Voltage Conversion Efficiency
  • 50µA Quiescent Current (MAX1720)
  • +1.5V to +5.5V Input Voltage Range
  • 25mA Output Current
  • Requires Only Two 1µF Capacitors (MAX1719/MAX1721)

应用/用途

  • 电池供电应用
  • GaAs PA偏置电源
  • 手持终端、PDA
  • 从正电源产生本地负电源
  • 小型LCD板

描述

The ultra-small MAX1719/MAX1720/MAX1721 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.5V to +5.5V. The MAX1720 operates at 12kHz, and the MAX1719/MAX1721 operate at 125kHz. High efficiency, small external components, and logic-controlled shutdown make these devices ideal for both battery-powered and board-level voltage conversion applications.

Oscillator control circuitry and four power MOSFET switches are included on-chip. A typical MAX1719/MAX1720/MAX1721 application is generating a -5V supply from a +5V logic supply to power analog circuitry. All three parts come in a 6-pin SOT23 package and can deliver a continuous 25mA output current.

For pin-compatible SOT23 switched-capacitor voltage inverters without shutdown (5-pin SOT23), see the MAX828/MAX829 and MAX870/MAX871 data sheets. For applications requiring more power, the MAX860/MAX861 deliver up to 50mA. For regulated outputs (up to -2 x VIN), refer to the MAX868. The MAX860/MAX861 and MAX868 are available in space-saving µMAX® packages.

简化框图

MAX1719、MAX1720、MAX1721:典型工作电路 MAX1719、MAX1720、MAX1721:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim专业的应用工程师团队也可以为您解答技术问题,请 访问Maxim的 支持中心