SM72238屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由美國德州儀器公司制造生產(chǎn)的SM72238穩(wěn)壓器 - 線性線性穩(wěn)壓器用于提供穩(wěn)定的輸出電壓，無論負(fù)載電流、輸入電壓或環(huán)境因素如何變化，這些輸出電壓通常都要保持不變。它們的工作原理要求輸入電壓維持在高于所需的輸出電壓，而且要超出某個最小量，并且在工作時會將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開關(guān)模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應(yīng)用。

1FEATURES

2? Renewable Energy Grade

? High-Accuracy Output Voltage

? Ensured 100mA Output Current

? Extremely Low Quiescent Current

? Low Dropout Voltage

? Extremely Tight Load and Line Regulation

? Very Low Temperature Coefficient

? Use as Regulator or Reference

? Needs Minimum Capacitance for Stability

? Current and Thermal Limiting

? Stable With Low-ESR Output Capacitors

(10mΩ to 6Ω)

DESCRIPTION

The SM72238 is a micropower voltage regulator with

very low quiescent current (75μA typ.) and very low

dropout voltage (typ. 40mV at light loads and 380mV

at 100mA). It is ideally suited for use in battery-

powered systems. Furthermore, the quiescent current

of the SM72238 increases only slightly in dropout, prolonging battery life.

The SM72238 is available in the surface-mount D-

Pak package.

Careful design of the SM72238 has minimized all

contributions to the error budget. This includes a tight

initial tolerance (.5% typ.), extremely good load and

line regulation (.05% typ.) and a very low output

voltage temperature coefficient, making the part

useful as a low-power voltage reference.