MAX863 - 双路、高效率、PFM、升压型DC-DC控制器

MAX863是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX863是双路、高效率、PFM、升压型DC-DC控制器，本站介绍了MAX863的封装应用图解、特点和优点、功能等，并给出了与MAX863相关的Maxim元器件型号供参考。

MAX863 - 双路、高效率、PFM、升压型DC-DC控制器 - DC-DC开关调节器 - 尺寸最小的双输出升压转换器，用于逻辑电路及LCD或闪存供电，1.5V输入 - 美信半导体

产品概述

The MAX863 dual-output DC-DC converter contains two independent step-up controllers in a single compact package. This monolithic Bi-CMOS design draws only 85µA when both controllers are on. The input range extends down to 1.5V, permitting use in organizers, translators, and other low-power hand-held products. The MAX863 provides 90% efficiency at output loads from 20mA to over 1A. This space-saving device is supplied in a 16-pin QSOP package that fits in the same area as an 8-pin SOIC.

The device uses a current-limited, pulse-frequency-modulated (PFM) control architecture that reduces start-up surge currents and maintains low quiescent currents for excellent low-current efficiency. Each controller drives a low-cost, external, N-channel MOSFET switch, whose size can be optimized for any output current or voltage.

In larger systems, two MAX863s can be used to generate 5V, 3.3V, 12V, and 28V from just two or three battery cells. An evaluation kit (MAX863EVKIT) is available to speed designs. For a single-output controller, refer to the MAX608 and MAX1771 data sheets.

关键特性

以下关键特性由Maxim美信半导体提供：

Smallest Dual Step-Up Converter: 16-Pin QSOP

90% Efficiency

1.5V Start-Up Voltage

85µA Max Total Quiescent Supply Current

1µA Shutdown Mode

Independent Shutdown Inputs

Drives Surface-Mount, Dual N-Channel MOSFETs

Low-Battery Input/Output Comparator

Step-Up/Down Configurable

热门应用

2节及3节电池供电的便携式设备

双电源(逻辑与LCD)

手持式仪表(PDA、掌上电脑)

数字助理

掌上电脑

PDA及其它手持设备

转换器

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