UC385T-3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UC385T-3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。

Fast Transient Response

10-mA to 5-A Load Current

Short Circuit Protection

Maximum Dropout of 500-mV at 5-A Load

Current

Separate Bias (VB) and VIN Pins

Available in Adjustable or Fixed Output

Voltages

5-Pin Package Allows Kelvin Sensing of

Load Voltage

Reverse Current Protection

description

The UC385 is a low dropout linear regulator providing a quick response to fast load changes. Combined with

its precision onboard reference, the UC385 excels at driving GTL and BTL buses. Due to its fast response to

load transients, the total capacitance required to decouple the regulator’s output can be significantly decreased

when compared to standard LDO linear regulators.

Dropout voltage (VIN to VOUT) is only 490 mV maximum and 350 mV typical at 5-A load (0°C to 100°C).

The onboard bandgap reference is stable with temperature and scaled for a 1.2 V input to the internal power

amplifier. The UC385 is available in fixed output voltages of 1.5 V, 2.1 V, or 2.5 V. The output voltage of the

adjustable version can be set with two external resistors. If the external resistors are omitted, the output voltage

defaults to 1.2 V.