TPS73131DBVT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TPS73131DBVT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? Stable With or Without Capacitors of All Types

? Input Voltage Range of 1.7 V to 5.5 V

? Ultralow Dropout Voltage: 30 mV Typical (150-mA

Load)

? Excellent Load Transient Response—With or

Without Optional Output Capacitor

? New NMOS Topology Provides Low Reverse

Leakage Current

? Low Noise: 30 μV RMS Typical (10 kHz to 100 kHz)

? 0.5% Initial Accuracy

? 1% Overall Accuracy Over Line, Load, and

Temperature

? Less Than 1-μA Maximum I Q in Shutdown Mode

? Thermal Shutdown and Specified Minimum and

Maximum Current Limit Protection

? Available in Multiple Output Voltage Versions

– Fixed Outputs of 1.20 V to 5 V

– Adjustable Outputs from 1.2 V to 5.5 V

– Custom Outputs Available.

2 Applications

? Smart Grid and Energy

? Building Automation

? Set-Top Boxes

? Medical Equipment

? Test and Measurement

? Point-of-Sale Terminals

? Wireless Infrastructure

3 Description

The TPS731xx family of low-dropout (LDO) linear

voltage regulators uses a new topology: an NMOS pass element 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 TPS731xx 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 1 μA

and ideal for portable applications. The extremely low

output noise (30 μVRMS with 0.1-μF CNR) is ideal for

powering VCOs. These devices are protected by

thermal shutdown and foldback current limit.