LD2980屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的LD2980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。

DESCRIPTION

The LD2980 series are 50mA fixed-output voltage regulator. The low drop-voltage and the ultra low quiescent current make them suitable for low noise, low power applications and in battery powered systems.

■ STABLE WITH LOW ESR CERAMIC CAPACITORS

■ ULTRA LOW DROPOUT VOLTAGE (0.12V TYP. AT 50mA LOAD, 7mV TYP. AT 1mA LOAD)

■ VERY LOW QUIESCENT CURRENT (80μA TYP. AT NO LOAD IN ON MODE; MAX 1μA IN OFF MODE)

■ GUARANTEED OUTPUT CURRENT UP TO 50mA

■ LOGIC-CONTROLLED ELECTRONIC SHUTDOWN

■ OUTPUT VOLTAGE OF 1.5; 1.8; 2.5; 2.85; 3.0; 3.2; 3.3; 3.6; 3.8; 4.0; 4.7; 4.85; 5.0V

■ INTERNAL CURRENT AND THERMAL LIMIT

■ ± 0.5 TOLERANCE OUTPUT VOLTAGE AVAILABLE (A VERSION)

■ OUTPUT LOW NOISE VOLTAGE 160μVRMS

■ TEMPERATURE RANGE: -40 TO 125°C

■ SMALLEST PACKAGE SOT23-5L AND SOT-89

■ FAST DYNAMIC RESPONSE TO LINE AND LOAD CHANGES