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紧凑的、双输出电荷泵

提供双极性输出,可理想用于空间受限应用

产品详情

主要特征

Parametric specs for Charge Pumps
Topology Doubler
Dual Output
Inverter
Unregulated
VIN (V) (min) 1.75
VIN (V) (max) 6
IOUT (A) (typ) 0.018
Unadj. VOUT (V) ±2xVIN
ICC (mA) (max) 1.05
Switching Frequency (kHz) 24
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.44
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参量

Parametric specs for Charge Pumps
Topology Doubler
Dual Output
Inverter
Unregulated
VIN (V) (min) 1.75
VIN (V) (max) 6
IOUT (A) (typ) 0.018
Unadj. VOUT (V) ±2xVIN
ICC (mA) (max) 1.05
Switching Frequency (kHz) 24
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.44

主要特征

  • 1.11mm-High µMAX Package
  • Compact: Circuit Fits in 0.08in²
  • Requires Only Four Capacitors
  • Dual Outputs (positive and negative)
  • +1.5V to +6.0V Input Voltage
  • 20kHz (min) Frequency (above the audio range)

应用/用途

  • 数据采集
  • LCD面板表
  • 低成本分割电源,用于低压系统
  • 无线手机中的低电压GaAsFET偏置
  • 用于模拟电路的降压电源
  • 3节镍基电池或1节Li+电池降压电源
  • VCO和GaAsFET电源

描述

The MAX865 is a CMOS charge-pump DC-DC converter in an ultra-small µMAX® package. It produces positive and negative outputs from a single positive input, and requires only four capacitors. The charge pump first doubles the input voltage, then inverts the doubled voltage. The input voltage ranges from +1.5V to +6.0V.

The internal oscillator is guaranteed to be between 20kHz and 38kHz, keeping noise above the audio range while consuming minimal supply current. A 75Ω output impedance permits useful output currents up to 20mA.

The MAX865 comes in a 1.11mm-high, 8-pin µMAX package that occupies half the board area of a standard 8-pin SOIC. For a device with selectable frequencies and logic-controlled shutdown, refer to the MAX864 data sheet.

简化框图

MAX865:典型工作电路 MAX865:典型工作电路 Zoom icon

Technical Docs

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