低電壓(1.25V)可編程精密穩(wěn)壓器 ME432
概述
ME432是一款低電壓三端可編程精密穩(wěn)壓器,在全溫度范圍內(nèi)如同低溫度系數(shù)的齊納管一樣穩(wěn)定。ME432 具有較寬的工作電流范圍,在典型動態(tài)阻抗0.05Ω 時為 1.0mA到100mA。
較低的溫度系數(shù)和較低的動態(tài)阻抗使 其在開關電源、充電管理、運放電路等許多應用中代替齊納二極管。
ME432工作電壓為18V,輸出電壓可以通過外部電阻在Vref(1.25V)到18V之間靈活設置。
ME432提供0.5%和1%兩種基準精度范圍的產(chǎn)品。
特點
●可編程輸出電壓范圍1.25V到18V
●高精度基準電壓:典型值0.15%
●在電容負載下可保持較高的穩(wěn)定性
●低溫度偏差:典型值4mV
●全溫度范圍溫度系數(shù)低:典型值30PPM/℃
●低動態(tài)阻抗:典型值0.05Ω
●較寬的負載電流范圍:70uA到100mA
●低輸出噪聲
●寬溫度范圍:-40到150℃
應用場合
●充電器
●電源適配器
●開關電源供電
●高精度電壓基準
封裝形式
●3-pin SOT23、TO92
General Description
The ME432 series ICs are three-terminal adjustable shunt regulators with guaranteed thermal stability over a full operation range. These ICs feature sharp turn-on
characteristics, low temperature coefficient and low output impedance, which make them ideal substitutes for Zener diodes in applications such as switching power supply, charger and other adjustable regulators.
The ME432 voltage type is 18V. The output voltage can be set to any value between
VREF (1.25V) and the corresponding maximum cathode voltage.
The ME432 precision reference is offered in two band
gap tolerance: 0.5% and 1.0%.
Features
●Programmable Precise Output Voltage from 1.25V to 18V
●Very Accurate Reference Voltage: Typical 0.15%
●High Stability under Capacitive Load
●Low Temperature Deviation: Typical 10mV
● Low Equivalent Full-range Temperature Coefficient with 50PPM/℃ Typical
●Low Dynamic Output Resistance: Typical 0.05Ω
● Sink Current Capacity from 0.1mA to 100 mA
● Low Output Noise
● Wide Operating Range of -40 to 150℃
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