回到顶部

50mA、频率可选的开关电容电压变换器

无电感反向器/正电源倍压电路,开关频率高达250kHz

产品详情

主要特征

应用/用途

Parametric specs for Charge Pumps
Topology Doubler
Inverter
Unregulated
VIN (V) (min) 1.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.05
Unadj. VOUT (V) +2xVIN
-VIN
ICC (mA) (max) 0.4
Switching Frequency (kHz) 250
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.3
查看更多

简化框图

技术文档

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

参量

Parametric specs for Charge Pumps
Topology Doubler
Inverter
Unregulated
VIN (V) (min) 1.5
VIN (V) (max) 5.5
IOUT (A) (typ) 0.05
Unadj. VOUT (V) +2xVIN
-VIN
ICC (mA) (max) 0.4
Switching Frequency (kHz) 250
Oper. Temp. (°C) -55 to +125
-40 to +85
0 to +70
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.3

主要特征

  • 8-Pin, 1.11mm High µMAX Package
  • Invert or Double the Input Supply Voltage
  • Three Selectable Switching Frequencies
  • High Frequency Reduces Capacitor Size
  • 87% Efficiency at 50mA
  • 200µA Quiescent Current (MAX860)
  • 1µA Shutdown Supply Current
  • 600mV Voltage Drop at 50mA Load
  • 12Ω Output Resistance

应用/用途

  • 手持式仪表(PDA、掌上电脑)
  • 接口供电
  • 医疗仪器
  • 运算放大器电源
  • 便携式计算机

描述

The MAX860/MAX861 charge-pump voltage converters invert input voltages ranging from +1.5V to +5.5V, or double input voltages ranging from +2.5V to +5.5V. Because of their high switching frequencies, these devices use only two small, low-cost capacitors. Their 50mA output makes switching regulators unnecessary, eliminating inductors and their associated cost, size, and EMI. Greater than 90% efficiency over most of the load-current range, combined with a typical operating current of only 200µA (MAX860), provides ideal performance for both battery-powered and board-level voltage-conversion applications.

A frequency-control (FC) pin provides three switching-frequencies to optimize capacitor size and quiescent current and to prevent interference with sensitive circuitry. Each device has a unique set of three available frequencies. A shutdown (active-low SHDN) pin reduces current consumption to less than 1µA. The MAX860/MAX861 are suitable for use in applications where the ICL7660 and MAX660's switching frequencies are too low. The MAX860/MAX861 are available in 8-pin µMAX® and SO packages.

简化框图

MAX860、MAX861:典型工作电路 MAX860、MAX861: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