TPS73733DCQR集成電路（IC）的線性+開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

TPS73733DCQR屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由德州儀器制造生產(chǎn)的TPS73733DCQR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

? Stable with 1μF or larger ceramic output capacitor

? Input voltage range: 2.2V to 5.5V

? Ultra-low dropout voltage

– Legacy silicon: 130mV typical at 1A

– New silicon: 122mV typical at 1A

? Excellent load transient response—even with only

1μF output capacitor

? NMOS topology delivers low reverse leakage

current

? Initial accuracy: 1%

? Overall accuracy over line, load, and temperature

– Legacy silicon: 3%

– New silicon: 1.5%

? Less than 20nA typical IQ in shutdown mode

? Thermal shutdown and current limit for fault

protection

? Available in multiple output voltage versions:

– Adjustable output: 1.20V to 5.5V

– Custom outputs available using factory

package-level programming

2 Applications

? Point-of-load regulation for DSPs, FPGAs, ASICs,

and microprocessors

? Post-regulation for switching supplies

? Portable and battery-powered equipment

3 Description

The TPS737 linear low-dropout (LDO) voltage

regulator uses an NMOS pass transistor in a voltagefollower

configuration. This topology is relatively

insensitive to the output capacitor value and ESR,

allowing for a wide variety of load configurations. Load

transient response is excellent, even with a small 1μF

ceramic output capacitor. The NMOS topology also

allows for very low dropout.

The TPS737 uses an advanced BiCMOS process to

yield high precision while delivering very low dropout

voltages and low ground pin current. Devices that use

the latest manufacturing flow have an updated design

with new silicon on the latest TI process technology.

Current consumption, when not enabled, is less than

20nA and is designed for portable applications. This

device is protected by thermal shutdown and foldback

current limit.

For applications that require higher output voltage

accuracy, consider TI's TPS7A37 1% overall

accuracy, 1A low-dropout voltage regulator.