MAX1745:高压、降压型DC-DC控制器,µMAX封装

高压(36V)降压型DC-DC控制器,µMAX封装

The MAX1744/MAX1745 are step-down DC-DC controllers capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage. The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V. The MAX1744/MAX1745 are available in a space-saving 10-pin µMAX® package.

关键特性
  • High-Voltage Operation (up to 36VIN)
  • Efficiency > 90%
  • Output Power Capability Exceeds 50W
  • 10-Pin µMax Package
  • Low-Dropout Voltage
  • 100% (max) Duty Cycle
  • 90µA Quiescent Current
  • 4µA Shutdown Current
  • Up to 330kHz Switching Frequency
  • Output Voltage
    • 5V or 3.3V (MAX1744)
    • Adjustable 1.25V to 18V (MAX1745)
  • Current-Limited Control Scheme
MAX1744、MAX1745:典型工作电路
MAX1744、MAX1745:典型工作电路
应用
  • 汽车电子
  • FireWire®/IEEE® 1394
  • 工业控制系统
  • 电信系统
  • 墙上适配器供电设备
数据手册DataSheet
语言下载文件备注
英文MAX1744-MAX1745.pdfRev 4; 02/2010
关键参数
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX17444.5363.35
  • 3.3
  • 5
  • Preset
  • Resistor
10External1330µMAX/10$2.75 @1k
MAX17451.2518-ResistorµMAX/10$3.16 @1k
开发工具
技术资料
质量和环境数据
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订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1745AUB停止供货MAX1745AUB+µMAX,;10引脚;15.4mm²-40°C至+125°CRoHS/无铅:否
MAX1745AUB+生产中µMAX,;10引脚;15.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX1745AUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+125°CRoHS/无铅:无铅
MAX1745AUB-T停止供货MAX1745AUB+TuMAX;10引脚-40°C至+125°C参考数据资料
MAX1745EUB生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1745EUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1745EUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1745EUB-T停止供货MAX1745EUB+TµMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1745EUB/V+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1745EUB/V+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1744-MAX1745.pdf MAX1745
Choosing the Right DC-DC Converter for Automotive Applications MAX8881
Turn-On Switching Loss of An Asynchronous Buck Converter MAX1745
MAX1745.pdf MAX1745
典型工作电路 MAX1745