LP2985AIM5X-2.8/NOPB集成電路（IC）的線性+開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

LP2985AIM5X-2.8/NOPB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LP2985AIM5X-2.8/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(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

? VIN range: 2.5 V to 16 V

? VOUT range (new chip):

– 1.2 V to 5.0 V (fixed, 100-mV steps)

? VOUT range (legacy chip): 2.5 V to 6.1 V

? VOUT accuracy:

– ±1 for A-grade legacy chip

– ±1.5 for standard-grade legacy chip

– ±0.5 for new chip only

? Output accuracy over load, and temperature:

– ±1 for new chip

? Output current: Up to 150 mA

? Low IQ (new chip): 71 μA at ILOAD = 0 mA

? Low IQ (new chip): 750 μA at ILOAD = 150 mA

? Shutdown current:

– 0.05 μA (typ) for legacy chip

– 1.12 μA (typ) for new chip

? Low noise: 30 μVRMS with 10-nF bypass capacitor

? Output current limiting and thermal protection

? Stable with 2.2-μF ceramic capacitors

? High PSRR: 70 dB at 1 kHz, 40 dB at 1 MHz

? Operating junction temperature: –40°C to +125°C

? Package: 5-pin SOT-23 (DBV) ultra-low dropout

voltage

2 Applications

? Washers and dryers

? Land mobile radios

? Active antenna system mMIMO

? Cordless power tools

? Motor drives and control boards

3 Description

The LP2985-N is a fixed-output, wide-input, low-noise,

low-dropout voltage regulator supporting an input

voltage range from 2.5 V to 16 V and up to 150 mA of

load current. The LP2985-N supports an output range

of 1.2 V to 5.0 V (new chip) and 2.5 V to 6.1 V (legacy

chip).

Additionally, the LP2985-N (new chip) has a 1

output accuracy across load and temperature that

can meet the needs of low-voltage microcontrollers

(MCUs) and processors.

Low output noise of 30 μVRMS (with 10-nF bypass

capacitors) and wide bandwidth PSRR performance

of greater than 70 dB at 1 kHz and 40 dB at 1 MHz

help attenuate the switching frequency of an upstream

DC/DC converter and minimize post regulator filtering.

The internal soft-start time and current-limit protection

reduce inrush current during start up, thus minimizing

input capacitance. Standard protection features, such

as overcurrent and overtemperature protection, are

included.

The LP2985-N is available in a 5-pin, 2.9-mm × 1.6-

mm SOT-23 (DBV) package.