5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters

General Description The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converter

文件：166.91 Kbytes 页数：12 Pages

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5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Conver

文件：778.12 Kbytes 页数：13 Pages

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5V/3.3V/3V可调、高效、低IQ、降压型DC-DC转换器

MAX639/MAX640/MAX653降压型开关稳压器在宽负载电流范围内提供高效率，提供高达225mA的电流。这些器件采用限流脉冲频率调制(PFM)控制方案，具有脉冲宽度调制(PWM)转换器的优势（重负载时效率高），同时电源电流仅10µA（PWM转换器的电源电流为2mA至10mA）。由此可在很宽的负载范围内保持高效率。\n\n MAX639/MAX640/MAX653输入范围为4V至11.5V，且这些器件提供更低的预设输出电压，分别为5V、3.3V和3V。或者，输出可由用户调整为1.3V到输入电压范围内的任何电压。\n\n MAX639/MAX640/MAX653具有内部 • 在宽负载电流范围内保持高效率\n\n• 静态电流：10µA\n\n• 输出电流最高可达225mA\n\n• 预设或可调输出电压：\n• 5.0V (MAX639)\n\n• 3.3V (MAX640)\n\n• 3.0V (MAX653)\n\n\n\n\n• 低电池电量检测比较器\n\n• 限流PFM控制方案;

ADI

亚德诺

SC70, Single/Dual Low-Voltage, Low-Power 關P Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：195.38 Kbytes 页数：11 Pages

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SC70/μDFN, Single/Dual Low-Voltage, Low-Power μP Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：327.97 Kbytes 页数：10 Pages

Maxim

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SC70/μDFN, Single/Dual Low-Voltage, Low-Power μP Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：327.97 Kbytes 页数：10 Pages

Maxim

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SC70, Single/Dual Low-Voltage, Low-Power 關P Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：195.38 Kbytes 页数：11 Pages

Maxim

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SC70, Single/Dual Low-Voltage, Low-Power 關P Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：195.38 Kbytes 页数：11 Pages

Maxim

美信

SC70, Single/Dual Low-Voltage, Low-Power 關P Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：195.38 Kbytes 页数：11 Pages

Maxim

美信

SC70, Single/Dual Low-Voltage, Low-Power 關P Reset Circuits

General Description The MAX6381–MAX6390 microprocessor (µP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3µA of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a

文件：195.38 Kbytes 页数：11 Pages

Maxim

美信