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MAX863：双路、高效率、PFM、升压型DC-DC控制器

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

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 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

MAX863：典型工作电路 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

数据手册DataSheet

关键参数

开发工具

• MAX863EVKIT

技术资料

• Two AA Cells Power Dual-Supply µP
• Circuit Connection Adds Current-Mode Operation to PFM Boost Converters

质量和环境数据

• MAX863.pdf

相关产品

• MAX717：3.3V掌上电脑及闪存存储器电源稳压器
• MAX723：3.3V/5V掌上电脑及LCD电源稳压器
• MAX722：3.3V/5V掌上电脑及LCD电源稳压器

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