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开关电容电压反相器

紧凑的、无电感、小外形反相器,封装尺寸为0.025平方英寸,用于偏置GaAsFET PA

产品详情

主要特征

Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 1.4
VIN (V) (max) 5.5
IOUT (A) (typ) 0.025
Unadj. VOUT (V) -VIN
ICC (mA) (max) 1
Switching Frequency (kHz) 125
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
2.41
缩小

简化框图

Technical Docs

数据资料 开关电容电压反相器 May 31, 2004

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参量

Parametric specs for Charge Pumps
Topology Inverter
Unregulated
VIN (V) (min) 1.4
VIN (V) (max) 5.5
IOUT (A) (typ) 0.025
Unadj. VOUT (V) -VIN
ICC (mA) (max) 1
Switching Frequency (kHz) 125
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
2.41

主要特征

  • 5-Pin SOT23-5 Package
  • 99% Voltage Conversion Efficiency
  • Invert Input Supply Voltage
  • 0.7mA Quiescent Current (MAX870)
  • +1.4V to +5.5V Input Voltage
  • Require Only Two Capacitors
  • 25mA Output Current
  • Shutdown Control

应用/用途

  • 电池供电设备
  • 蜂窝电话
  • 手持终端、PDA
  • 从5V逻辑电源产生本地-5V电源
  • 医疗仪器
  • 小型LCD板

描述

The ultra-small MAX870/MAX871 monolithic, CMOS charge-pump inverters accept input voltages ranging from +1.4V to +5.5V. The MAX870 operates at 125kHz, and the MAX871 operates at 500kHz. Their high efficiency (90%) and low operating current (0.7mA for the MAX870) 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 MAX870/ MAX871 application is generating a -5V supply from a +5V logic supply to power analog circuitry. Both parts come in a 5-pin SOT23-5 package and can deliver 25mA with a voltage drop of 500mV.

For a similar device with logic-controlled shutdown, refer to the MAX1720/MAX1721. For applications requiring more power, the MAX860 delivers up to 50mA with a voltage drop of 600mV, in a space-saving µMAX package.

简化框图

MAX870、MAX871:典型工作电路 MAX870、MAX871:典型工作电路 Zoom icon

Technical Docs

数据资料 开关电容电压反相器 May 31, 2004

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

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