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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.