Texas Instruments LP2985-N Handleiding

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LP2985-N 150mA, Low-Noise, Low-Power, Ultra-Low-Dropout Regulator in a SOT-23

Package

1 Features

•V

IN

range: 2.5V to 16V

•V

OUT

range (new chip):

–1.2V to 5.0V (fixed, 100mV steps)

•V

OUT

range (legacy chip): 2.5V to 6.1V

•V

OUT

accuracy:

–±1% for A-grade (legacy chip)

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

–±0.5% (new chip)

•Output accuracy over load, and temperature:

–±1% (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:

–0.05μA (typical, legacy chip)

–1.12μA (typical, 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

•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. The device supports an

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

up to 150mA of load current. The LP2985-N supports

an output range of 1.2V to 5.0V (new chip) and 2.5V

to 6.1V (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 30µV

RMS

(with 10nF bypass

capacitors) and wide bandwidth PSRR performance

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

(for new chip) help attenuate the switching frequency

of an upstream DC/DC converter and minimize post

regulator filtering.

The new chip version of LP2985-N has internal

soft-start mechanism that reduces 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, 2.9mm × 2.8mm

SOT-23 (DBV) package.

Package Information

PART NUMBERPACKAGE

(1)

PACKAGE SIZE

(2)

LP2985-NDBV (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-N

SNVS018AB – 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.

Product specificaties