LP3982IMMX-2.82/NOPB屬于集成電路（IC）的線性+開關(guān)穩(wěn)壓器。由美國德州儀器公司制造生產(chǎn)的LP3982IMMX-2.82/NOPB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(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噪聲高度敏感的應(yīng)用。

1 Features

1? 2.5-V to 6-V Input Range

? MAX8860 Pin, Package, and Specification

Compatible

? 300-mA Output Current

? 120-mV Typical Dropout at 300 mA

? 90-μA Typical Quiescent Current

? 1-nA Typical Shutdown Mode

? 60-dB Typical PSRR

? 120-μs Typical Turnon Time

? Stable With Small Ceramic Output Capacitors

? 37-μVRMS Output Voltage Noise

(10 Hz to 100 kHz)

? Overtemperature/Overcurrent Protection

? ±2% Output Voltage Tolerance

? Create a Custom Design Using the LP3982 With

the WEBENCH? Power Designer

2 Applications

? Wireless Handsets

? DSP Core Power

? Battery Powered Electronics

? Portable Information Appliances

3 Description

The LP3982 low-dropout (LDO) CMOS linear

regulator is available in 1.8-V, 2.5-V, 2.82-V, 3-V,

3.3-V, and adjustable versions. They deliver 300 mA

of output current. Packaged in an 8-pin VSSOP, the

LP3982 is pin- and package-compatible with Maxim's

MAX8860. The LM3982 is also available in the small

footprint WSON package.

The LP3982 suits battery-powered applications

because of its shutdown mode (1 nA typical), low

quiescent current (90 μA typical), and LDO voltage

(120 mV typical). The low dropout voltage allows for

more utilization of a battery’s available energy by

operating closer to its end-of-life voltage. The LP3982

device's PMOS output transistor consumes relatively

no drive current compared to PNP LDO regulators.

This PMOS regulator is stable with small ceramic

capacitive loads (2.2 μF typical).

These devices also include regulation fault detection,

a bandgap voltage reference, constant current

limiting, and thermal-overload protection.