LD39300PT25-R屬于集成電路（IC）的線性+開關穩(wěn)壓器。由意法半導體集團制造生產(chǎn)的LD39300PT25-R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)應用而言，雖然這種穩(wěn)壓器的效率低于開關模式的穩(wěn)壓器，但它們通常更適合對噪聲高度敏感的應用。

描述 Description

The LD39300 is a fast ultra low drop linear regulator which operates from 2.5V to 6V input supply.

A wide range of output options are available. The low drop voltage, low noise, and ultra low quiescent current make it suitable for low voltage microprocessor and memory applications. The device is developed on a BiCMOS process which allows low quiescent current operation independently of output load current.

Feature summary

■ 3A Guaranteed output current

■ Ultra low dropout voltage (200mV typ. @ 3A load, 40mV typ. @600mA load)

■ Very low quiescent current (1.2mA typ. @ 3A load, 1μA max @ 25°C in off mode)

■ Logic-controlled electronic shutdown

■ Current and thermal internal limit

■ ±1.5 Output voltage tolerance @ 25°C

■ Fixed and ADJ output voltages: 1.22V, 1.8V, 2.5V, 3.3V, ADJ. (*see order code)

■ Temperature range: -40 to 125°C

■ Fast dynamic response to line and load changes

■ Stable with ceramic capacitor (see paragraph 7.1, 7.2, 7.3)

■ Available in PPAK and DPAK

Typical application

■ Microprocessor power supply

■ DSPs power supply

■ Post regulators for switchin suppliers

■ High efficiency linear regulator