5V/200mA PFM 異步升壓轉(zhuǎn)換器

HT77xxBA 系列為PFM 升壓DC/DC 轉(zhuǎn)換 器，效率高、紋波低。此系列具有超低啟 動電壓以及高輸出電壓精度。僅需少量外 部元器件便可提供固定的2.7V/3.0V/3.3V/ 3.7V/5.0V 輸出電壓。CMOS 技術(shù)確保低電 源電流，使得該系列芯片成為單節(jié)或多節(jié) 電池供電應(yīng)用的理想選擇。\nHT77xxBA系列內(nèi)置一個振蕩器、一個PFM 控制電路、一個驅(qū)動晶體管、一個參考電 壓單元以及一個高速比較器。采用脈沖頻 率調(diào)制(PFM) 可實現(xiàn)輕載輸出時電源電流 以及紋波為最小。這些芯片采用節(jié)省空間 的TO92、SOT89-3、SOT23-3 和SOT23-5 封裝類型。SOT23-5 封 ?低啟動電壓：0.85V ( 典型值 )\n ?效率高達 85%\n ?超低空載輸入電流\n ?高輸出電壓精度：±2.5%\n ?固定輸出電壓：2.7V/3.0V/3.3V/3.7V/5.0V\n ?超低關(guān)機電流：0.1μA ( 典型值 )\n ?封裝類型： SOT23-3、SOT23-5、SOT89-3、TO92;

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100mA PFM Synchronous Step-up DC/DC Converter

The HT77xxS devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up voltage as well as high

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100mA PFM Synchronous Step-up DC/DC Converter

文件：1.85792 Mbytes 頁數(shù)：25 Pages

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200mA PFM Synchronous Step-up DC/DC Converter

General Description The HT77xxSA devices are a high efficiency PFM synchronous step-up DC-DC converter series which are designed to operate with both wire wound chip power inductors and also with multi-layered chip power inductors. The device series have the advantages of extremely low start-up v

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