SP6644 单/双极 Alkaline电池，高效放大直流到直流（DC-DC）调节器

The SP6644/6645 devices are high-efficiency, low-power step-up DC-DC converters ideal for single or dual alkaline cell applications such as pagers, remote controls, pointing devices, medical monitors, and other low-power portable end products. Designers can control the SP6644 device with an active LOW shutdown input. The SP6644 device features an active low output for batteries below +1.0V. The SP6645 device features an active low output for batteries below +2.0V. Both devices contain a 0.8Ω synchronous rectifier, a 0.5Ω N-channel MOSFET power switch, an internal voltage reference, circuitry for pulsefrequency- modulation, and an under voltage comparator. The output voltage for the SP6644/6645 devices is preset to +3.3V + 4% or can be adjusted from +2V to +5.5V by manipulating two external resistors

技术特性

90mA Output Current at 1.3V Input
190mA Output Current at 2.6V Input
+2V to +5.5V Output Range
0.88V Guaranteed Start-Up
92% High Efficiency
1.6µA Quiescent Supply Current at VBATT
Reverse Battery Protection
Internal Synchronous Rectifier
5nA Logic Controlled Shutdown Current From VBATT
Low-Battery Detection Active LOW Output
Small 8 Pin MSOP Package
Flexibility to Optimize Inductor Type with Programmable Peak Current Control
No External FETs

应用领域 APPLICATION

PDA's
DSC's
CD/MP3 Players
Pagers
Digital Cameras
Portable Handheld Medical Devices

技术指标

输出电流(mA)	175
最低输入电压(V)	0.9
最高输入电压(V)	3.3
静态电流(µA)	50
最低输出电压(V)	2
最高输出电压(V)	5.5
效率(%)	92
说明书	固定的 3.3V电压

功能框图 Functional Block Diagram

订购信息 Ordering Information

器件型号	封装编码	有害物质限制	最低温度	最高温度	状态	立刻购买	申请样片
SP6644EU-L/TR	MSOP8		-40	85	运行
SP6644UEB	Board		0	70	运行
SP6644EU-L	MSOP8		-40	85	运行

应用技术支持与电子电路设计开发资源下载	版本信息	大小
SP6644 数据资料DataSheet下载:pdf	Rev.V2	2 页