TL5209DR屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由美國(guó)德州儀器公司制造生產(chǎn)的TL5209DR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(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。

1 Features

1? Adjustable Output Voltage

? 1%/2% Accuracy (25°C/Full Range)

? 500-mV (Maximum) Dropout at Full Load of

500 mA

? Tight Regulation Overtemperature Range

– 0.1%/V (Maximum) Line Regulation

– 0.7% (Maximum) Load Regulation

? Ultra Low-Noise Capability (300 nV/√Hz Typical)

? Shutdown Current of 3 μA (Maximum)

? Low Temperature Coefficient

? Current Limiting and Thermal Protection

? Stable With Minimum Load of 1 mA

? Reverse-Battery Protection reverse?

Applications

– Portable Applications (PDAs, Laptops,

Cell Phones)

– Consumer Electronics

– Post-Regulation for SMPS

? Available in Convenient SOIC-8 Surface-Mount

Package

2 Applications

? Set-Top Boxes

? PCs and Notebooks

? EPOS

? Building Automation

3 Description

The TL5209 device is 500-mA low-dropout (LDO)

regulator that is well suited for portable applications. It has a lower quiescent current than most traditional

PNP regulators and allows for a shutdown current of

0.05 μA (typical). The TL5209 also has very good

dropout voltage characteristics, requiring a maximum

dropout of 10 mV at light loads and 500 mV at full load. In addition, the LDO also has a 1% output

voltage accuracy and very tight line and load

regulation that is comparable to its CMOS

counterparts.

For noise-sensitive applications, the TL5209 allows

for low-noise capability through an external bypass capacitor connected to the BYP pin, which reduces

the output noise of the regulator. Other features

include current limiting, thermal shutdown, reverse?

battery protection, and low temperature coefficient.

The TL5209 is available with adjustable output.

Offered in an SOIC-8 surface-mount package, the

TL5209 is characterized for operation over the virtual junction temperature ranges of –40°C to 125°C.