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发布者:微桥 发布时间:2013/1/10 阅读:6718次    关键字: 移动电源
安茂微电子推出高效率2A同步升压转换器


安茂微电子推出高效率2A同步升压转换器

安茂微电子(AME)宣布推出一系列 DC-DC 升压转换器 AME5125 ,采用电流控制同步技术以及将 MOSFET 整合进来,有效提供高效率的电源。输入电压为2.7V~5.5V,提供最大5.5A的输出电流,主要应用于可携式电源与蓝牙音箱等单电池供电的可携式装置相关产品,适用于硷性电池、镍氢电池或锂电池。

AME5125 同步升压转换器的静态电流为60uA,输出电压范围为3.3V至5.5V,提供可调式电压版本。大幅简化了应用线路,节省成本与空间。此产品适用于需要电池输入电压、高效率输出电流、低静态电流升压转换的可携式产品应用。因提供了低静态电流与高效能,故可以有效延长电池供电时间寿命。提供了消费者较长的供电时间。

产品特性包括>90%效率、提供输出短路保护、过电压保护、过电流保护以及过温度保护。

AME5125-High Efficiency 500KHz Step-Up Converter DataSheet 

DESCRIPTION
    The AME5125 is a high-performance current mode synchronous
boost converter with integrated Power MOSFETs
which on-resistance of internal main switch is only 50mW
and rectifier switch resistance is 50mW to maintain high
efficiency in heavy load conditions that supports switch
peak current of up to 5.5A. The integrated circuit supports
an input voltage range of 2.7V to 5.5V.
    The converter can be disabled to minimize battery drain.
During shutdown, the load (VOUT) is completely disconnected
from the battery (VIN). Additional functions include
an internal soft-start function in order to easy inrush
current control. The circuit protection includes Over
Voltage Protection and Thermal Shutdown to prevent device
failure under the "Worst" of operating conditions.
    This device is available in SOP-8/PP with exposed pad
for low thermal resistance.

FEATURES
 High Efficiency Synchronous Boost Converter
 Internal Low RDS(ON) Power MOSFETs
H: 50mW(PMOS) / L: 50mW(NMOS) Typical
 Operating (Input) Range: 2.7V ~ 5.5V
 Up to 5.5V Output Voltage
 500KHz Switching Frequency
  Provide High Efficiency at Light Loading
  Load Disconnect During Shutdown
  Adjust Peak Switch Current
 Short Circuit into Hiccup Mode
 Internal Soft Start
 Integrated Over-Voltage Protection
 Thermal Shutdown
 All AME's Lead Free Products Meet RoHS Standards

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