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LP2985 150mA, Low-Noise, Low-Dropout Regulator With Shutdown

1 Features

•V

IN

range (new chip): 2.5V to 16V

•V

OUT

range (new chip):

–1.2V to 5.0V (fixed, 100mV steps)

•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 150mA

•Low I

Q

(new chip): 71μA at I

LOAD

= 0mA

•Low I

Q

(new chip): 750μA at I

LOAD

= 150mA

•Shutdown current:

–0.01μA (typ, legacy chip)

–1.12μA (typ, 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 (new

chip)

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

•Package: 5-pin SOT-23 (DBV)

2 Applications

•Washer and dryer

•Land mobile radio

•Active antenna system mMIMO

•Cordless power tool

•Motor drives and control boards

3 Description

The LP2985 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 150mA of load current. The LP2985 supports an

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

Additionally, the LP2985 (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 provides internal soft-start mechanism

to reduce inrush current during start up, thus

minimizing input capacitance. Standard protection

features, such as overcurrent and overtemperature

protection, are also included.

The LP2985 is available in a 5-pin 2.9mm × 2.8mm

SOT-23 (DBV) package.

Package Information

PART

NUMBER

PACKAGE

(1)

PACKAGING SIZE

(2)

LP2985DBV (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.

Temperature(°C)

Dropout(mV)

-75-50-250255075100125150

0

50

100

150

200

250

300

350

400

450

Iout

1mA

10mA

50mA

150mA

Dropout Voltage vs Temperature (New Chip)

INOUT

ON/

OFF

BYPASS

LP2985

GND

C

IN

GND

GND

GND

C

OUT

GND

10 nF

V

IN

V

OUT

Typical Application Circuit

LP2985, LP2985A

SLVS522S – JULY 2004 – REVISED MAY 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