LP2980IM5-ADJ集成電路（IC）的線性+開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

LP2980IM5-ADJ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LP2980IM5-ADJ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:

– Legacy chip: 2.2 V to 16 V

– New chip: 2.5 V to 16V

? VOUT range:

– Legacy chip: 1.23 V to 15.0 V

– New chip: 1.2 V to 15.0 V

? VOUT(typ) accuracy:

– Legacy chip: ±1

– New chip: ±0.5

? Output accuracy over load and temperature:

– Legacy chip: ±3.5

– New chip: ±1

? Output current: Up to 50 mA

? Quiescent current, low IQ (new chip):

– 55 μA at ILOAD = 0 mA

– 350 μA at ILOAD = 50 mA

? Shutdown current over temperature:

– Legacy chip: < 1 μA

– New chip: ≤ 0.8 μA

? Output current limiting and thermal protection

? Stable with 2.2-μF ceramic capacitors (new chip)

? High PSRR (new chip):

– 70 dB at 1 kHz, 42 dB at 1 MHz

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

? Package: 5-pin SOT-23 (DBV)

2 Applications

? Residential breakers

? Solid state drives (SSD)

? Electricity meters

? Appliances

? Building automation

3 Description

The LP2980-ADJ is an adjustable-output, wide-input,

low-dropout voltage regulator supporting an input

voltage range up to 16 V and up to 50 mA of load

current. The LP2980-ADJ supports an output range

of 1.2 V to 15.0 V (new chip) and 1.23 V to 15.0 V

(legacy chip).

Additionally, the LP2980-ADJ (new chip) has a 1

output accuracy across load and temperature that

can meet the needs of low-voltage microcontrollers

(MCUs) and processors.

In the new chip, wide bandwidth PSRR performance

of greater than 70 dB at 1 kHz and 45 dB at

1 MHz helps 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 LP2980-ADJ is available in a 5-pin, 2.9-mm ×

1.6-mm SOT-23 (DBV) package.