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.

LP2985AIM5-2.8/NOPB属于集成电路（IC） > 线性 + 开关稳压器。美国德州仪器公司制造生产的LP2985AIM5-2.8/NOPB稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。