MAX861 - 50mA、频率可选的开关电容电压变换器

MAX861是Maxim美信半导体公司的一款电荷泵产品，MAX861是50mA、频率可选的开关电容电压变换器，本站介绍了MAX861的封装应用图解、特点和优点、功能等，并给出了与MAX861相关的Maxim元器件型号供参考。

MAX861 - 50mA、频率可选的开关电容电压变换器 - 电荷泵 - 无电感反向器/正电源倍压电路，开关频率高达250kHz - 美信半导体

产品概述

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.

关键特性

以下关键特性由Maxim美信半导体提供：

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

热门应用

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

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