DESCRIPTION

The LX8940 is a 5V, low dropout, low quiescent current regulator rated for 1A of output current. It can regulate with as low as 0.4V headroom between the input and output voltages, thus minimizing power dissipation. In addition, it can be used in applications where worst case supplies require a low input-output differential to maintain regulation. This feature makes it ideal for computer monitors that have to comply with energy-efficient / Green PC programs, where the input voltage drops to only a few tenths of a volt above the output when power supply enters sleep-mode operation.

KEY FEATURES

■ 2 Internally Trimmed Output

■ Output Current In Excess Of 1A

■ Input-Output Differential Less Than 0.4V At 1A

■ Reverse Battery Protection

■ 60V Load Dump Protection

■ -50V Reverse Transient Protection

■ Short Circuit Protection

■ Internal Thermal Overload Protection

■ Available In 3-Lead Plastic TO- 220

■ Drops In Most lM2940 Sockets

APPLICATIONS

■ Small Headroom Battery Applications

■ High Efficiency Linear Regulators

■ Post Regulators For Switching Power Supplies

■ Green PC Monitor Applications

LX8940屬于集成電路（IC） > 線性 + 開(kāi)關(guān)穩(wěn)壓器。美高森美公司制造生產(chǎn)的LX8940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(wú)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(gè)最小量，并且在工作時(shí)會(huì)將輸入端的任何多余電壓轉(zhuǎn)換為熱量。對(duì)于大多數(shù)應(yīng)用而言，雖然這種穩(wěn)壓器的效率低于開(kāi)關(guān)模式的穩(wěn)壓器，但它們通常更適合對(duì)噪聲高度敏感的應(yīng)用。