MAX868 - 稳压型、可调节、-2倍压反相电荷泵

MAX868是Maxim美信半导体公司的一款电荷泵产品，MAX868是稳压型、可调节、-2倍压反相电荷泵，本站介绍了MAX868的封装应用图解、特点和优点、功能等，并给出了与MAX868相关的Maxim元器件型号供参考。

MAX868 - 稳压型、可调节、-2倍压反相电荷泵 - 电荷泵 - 无电感稳压器，用于LCD偏置电源 - 美信半导体

产品概述

The MAX868 inverting charge pump provides a low-cost and compact means of generating a regulated negative voltage up to -2 x VIN from a positive input voltage between 1.8V and 5.5V. It uses a pulse-frequency-modulation (PFM) control scheme to generate the regulated negative output voltage. PFM operation is obtained by gating the internal 450kHz oscillator on and off as needed to maintain output voltage regulation. This unique on-demand switching scheme gives the MAX868 excellent light-load efficiency without degrading its full-load operation (up to 30mA), permitting smaller capacitors to take advantage of the oscillator's high switching frequency.

The MAX868 requires no inductors; only four capacitors are required to build a complete DC-DC converter. Output voltage regulation is achieved by adding just two resistors. The MAX868 comes in a 10-pin µMAX® package, which is only 1.11mm high and occupies just half the board area of a standard 8-pin SO.

关键特性

以下关键特性由Maxim美信半导体提供：

Regulated Negative Output Voltage (up to -2 x VIN)

Ultra-Small, 10-Pin µMAX Package

On-Demand Switching at up to 450kHz

30µA Quiescent Supply Current

Requires Only Four Small External Capacitors

1.8V to 5.5V Input Voltage Range

0.1µA Logic-Controlled Shutdown

Up to 30mA Output Current

Adjustable output voltage

热门应用

电池供电应用

便携式摄像机

蜂窝电话

无绳电话

手持终端、PDA

医疗仪器

小型LCD板

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