PFM Step-up DC/DC Converter

General Description The HT77XX series is a set of PFM step-up DC/DC con verter with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only three external components to provide a fixed output voltage of 1.8V, 2.2V, 2.7

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PFM Step-up DC/DC Converter

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PFM Asynchronous Step-up DC to DC Converter (100mA)

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PFM Asynchronous Step-up DC to DC Converter (100mA)

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PFM Step-up DC/DC Converter

General Description The HT77xxA series is a set of PFM step-up DC/DC converter with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only three external components to provide a fixed output voltage of 2.7V, 3.0V, 3.3

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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

文件：2.20488 Mbytes 页数：29 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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PFM Step-up DC/DC Converter

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100mA PFM Synchronous Step-up DC/DC Converter

文件：1.85792 Mbytes 页数：25 Pages

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5V/200mA PFM 异步升压转换器

HT77xxBA 系列为PFM 升压DC/DC 转换 器，效率高、纹波低。此系列具有超低启 动电压以及高输出电压精度。仅需少量外 部元器件便可提供固定的2.7V/3.0V/3.3V/ 3.7V/5.0V 输出电压。CMOS 技术确保低电 源电流，使得该系列芯片成为单节或多节 电池供电应用的理想选择。\nHT77xxBA系列内置一个振荡器、一个PFM 控制电路、一个驱动晶体管、一个参考电 压单元以及一个高速比较器。采用脉冲频 率调制(PFM) 可实现轻载输出时电源电流 以及纹波为最小。这些芯片采用节省空间 的TO92、SOT89-3、SOT23-3 和SOT23-5 封装类型。SOT23-5 封 •低启动电压：0.85V ( 典型值 )\n •效率高达 85%\n •超低空载输入电流\n •高输出电压精度：±2.5%\n •固定输出电压：2.7V/3.0V/3.3V/3.7V/5.0V\n •超低关机电流：0.1μA ( 典型值 )\n •封装类型： SOT23-3、SOT23-5、SOT89-3、TO92;

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