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LP2982 50mA, Low-Noise, Low-Dropout Regulator in SOT-23 Package

1 Features

•V

IN

range (new chip): 2.5V to 16V

•V

OUT

range (new chip): 1.2V to 5.0V

•V

OUT

accuracy:

–±1% for A-grade (legacy chip)

–±1.5% for standard-grade (legacy chip)

–±0.5% (new chip)

•±1% output accuracy over load and temperature

(new chip)

•Output current: Up to 50mA

•Low I

Q

(new chip): 69μA at I

LOAD

= 0mA

•Low I

Q

(new chip): 380μA at I

LOAD

= 50mA

•Shutdown current:

–1μA for legacy chip

–2.25μA for new chip

•Low noise: 30μV

RMS

with 10nF bypass capacitor

•Output current limiting and thermal protection

•Stable with 2.2µF ceramic capacitors (new chip)

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

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

•Package: 5-pin SOT-23 (DBV)

2 Applications

•Factory automation and control

•Industrial transport (non-car, non-light truck)

•Grid infrastructure

•Medical

3 Description

The LP2982 is a fixed-output, wide-input, low-noise,

low-dropout voltage regulator supporting an input

voltage range from 2.5V to 16V (for new chip) and

up to 50mA of load current. The LP2982 supports an

output range of 1.2V to 5.0V (new chip).

Additionally, the LP2982 (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 30µV

RMS

(with 10nF bypass

capacitors) and wide bandwidth PSRR performance

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

help attenuate the switching frequency of an upstream

DC/DC converter and minimize post regulator filtering.

The new chip version of the LP2982 includes an

internal soft-start mechanism to reduce inrush current

during start up, thus minimizing input capacitance

requirement. Standard protection features, such as

overcurrent and overtemperature protection, are

included.

The LP2982 is available in a 5-pin 2.9mm × 2.8mm

SOT-23 (DBV) package.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

LP2982DBV (SOT-23, 5)2.9mm × 2.8mm

(1)For more information, see the Mechanical, Packaging, and

Orderable Information.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

INOUT

ON/

OFF

LP2982

GND

C

IN

GND

GND

C

OUT

GND

V

IN

V

OUT

BYPASS

GND

C

BYPASS

Simplified Schematic

Temperature(°C)

Dropout(mV)

-75-50-250255075100125150

0

50

100

150

200

250

1mA10mA50mA

Dropout Voltage vs Temperature (New Chip)

LP2982

SNVS128M – MARCH 2000 – REVISED JUNE 2025

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspecifikationer