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LP2985-33DBVT

TILP2985-33DBVT

Texas Instruments
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5
NRND11,615 in stock
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Overview

The LP2985-33DBVT is a 150mA, fixed-output linear voltage regulator designed for stable 3.3V power delivery in space-constrained applications. It operates with a wide input voltage range up to 16V and features a low quiescent current of 750uA at full load to help extend battery life. This LDO includes an enable pin, allowing for a near-zero 0.01uA shutdown mode during system standby.

Why Choose This Part

The regulator is robust against harsh conditions with a wide operating temperature range from -40C to 125C. It integrates essential protection features including over-current limiting, thermal shutdown, and a short-circuit protected output. The 30 nV/rtHz noise specification makes it suitable for precision analog front-ends requiring low spectral noise density.

Applications

Industrial Motor Control Boards
Provides clean 3.3V logic rails for microcontrollers and sensors in motor drive environments.
Handheld Power Tools
Utilizes the small SOT-23 footprint and thermal protection to manage power in compact, high-heat cordless tools.
Land Mobile Radio Systems
Leverages 45dB PSRR at 1kHz to minimize noise in sensitive communication RF circuitry.
Active Antenna Systems
Supports mMIMO infrastructure by providing localized, regulated power with internal soft-start to manage inrush current.

Key Specifications

PSRR 45dB (1kHz)
Output Type Fixed
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Control Features Enable
Current - Output 150mA
Protection Features Over Current, Over Temperature, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 16V
Voltage Dropout (Max) 0.58V @ 150mA
Current - Supply (Max) 2.5 mA
Supplier Device Package SOT-23-5
Current - Quiescent (Iq) 95 uA
Voltage - Output (Min/Fixed) 3.3V

Getting Started

When designing the PCB layout, place a high-quality ceramic bypass capacitor close to the output pin to ensure regulator stability. Use the EN (Enable) pin to toggle the device state from a microcontroller GPIO, ensuring the logic high threshold is met for reliable startup. Refer to the DBV package footprint for SOT-23-5 land pattern requirements.

LP2985-33 Family

Also available as: LP2985-33DBVR

Also Consider

TLV70233DBVT TITexas Instruments - Offers a much lower quiescent current of 37uA for even tighter power budgets in portable electronics.
MIC5219-3.3YM5-TR MCHPMicrochip Technology - Provides a higher peak output current of 500mA in the same SOT-23-5 package for higher load transients.
LP2985-33DBVR TITexas Instruments - Identical electrical specifications but supplied in a 3000-unit large tape and reel for high-volume manufacturing.