MAX860, MAX861 50mA、频率可选的开关电容电

MAX860, MAX861 50mA、频率可选的开关电容电压变换器  

MAX860, MAX861概述

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.

 

MAX860, MAX861 关键特性

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

MAX860, MAX861 pdf datasheet

MAX860, MAX861 应用/使用

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

MAX860, MAX861 应用电路

典型工作电路