1 Features

? Stable with no output capacitor or any value or

type of capacitor

? Input voltage range: 1.7V to 5.5V

? Ultra-low dropout voltage: 40mV typical at 250mA

? Excellent load transient response—with or without

optional output capacitor

? NMOS topology provides low reverse leakage

current

? Low noise: 30μVRMS typical (10kHz to 100kHz)

? 0.5% initial accuracy

? 1% overall accuracy (line, load, and temperature)

? Less than 1μA maximum IQ in shutdown mode

? Thermal shutdown and specified min and max

current limit protection

? Available in multiple output voltage versions:

– Fixed outputs of 1.2V to 5V

– Adjustable outputs from 1.2V to 5.5V

– Custom outputs available

2 Applications

? Portable and battery-powered equipment

? Post-regulation for switching supplies

? Noise-sensitive circuitry such as VCOs

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

and microprocessors

3 Description

The TPS732 low-dropout (LDO) voltage regulator

uses an NMOS pass transistor in a voltage-follower

configuration. This topology is stable using output

capacitors with low equivalent series resistance

(ESR), and even allows operation without a capacitor.

The device also provides high reverse blockage (low

reverse current) and ground pin current that is nearly

constant over all values of output current.

The TPS732 uses an advanced BiCMOS process

to yield high precision while delivering very low

dropout voltages and low ground pin current. Current

consumption, when not enabled, is less than 1μA and

designed for portable applications. The extremely low

output noise (30μVRMS with 0.1μF CNR) is designed

for powering VCOs. This device is protected by

thermal shutdown and foldback current limit.

TPS73230DCQR屬于集成電路（IC） > 線性 + 開關(guān)穩(wěn)壓器。美國德州儀器公司制造生產(chǎn)的TPS73230DCQR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(guān)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。