TPS737集成電路（IC）的線性+開關穩(wěn)壓器規(guī)格書PDF中文資料

TPS737屬于集成電路（IC）的線性+開關穩(wěn)壓器。由德州儀器制造生產(chǎn)的TPS737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。

1 Features

? Stable with 1-μF or larger ceramic output capacitor

? Input voltage range: 2.2 V to 5.5 V

? Ultra-low dropout voltage

– Legacy silicon: 130 mV typical at 1 A

– New silicon, M3 suffix: 122 mV typical at 1 A

? Excellent load transient response—even with only

1-μF output capacitor

? NMOS topology delivers low reverse leakage

current

? Initial accuracy: 1%

? Overall accuracy over line, load, and temperature

– Legacy silicon: 3%

– New silicon, M3 suffix: 1.5%

? Less than 20 nA typical IQ in shutdown mode

? Thermal shutdown and current limit for fault

protection

? Available in multiple output voltage versions:

– Adjustable output: 1.20 V to 5.5 V

– 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 1-μF

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. Part numbers

with the M3 suffix use an updated design on the

latest TI process technology. Current consumption,

when not enabled, is less than 20 nA 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, 1-A low-dropout voltage regulator.