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LP2985-30DBVR

TILP2985-30DBVR

Texas Instruments
A widely used low-dropout fixed 3.0 V regulator available in small packages as an alternative for low-noise applications.
NRND1,060 in stock
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Overview

The LP2985-30DBVR is a fixed-output 3.0V low-dropout (LDO) regulator designed for systems requiring a stable voltage supply with low-noise characteristics. It provides up to 150mA of output current while maintaining a low ground current of 750uA at full load, making it suitable for battery-powered designs. The device is housed in a compact 5-pin SOT-23 package and includes an active-low enable pin for power management.

Why Choose This Part

The LP2985 offers robust protection features including internal thermal overload protection and short-circuit current limiting. Its integrated soft-start mechanism prevents voltage overshoot during power-up, and the 45dB PSRR at 1kHz ensures effective rejection of input supply noise.

Applications

Battery-Powered Handheld Devices
Utilizes the low 1.75uA shutdown current to extend battery life in portable electronics.
Precision Analog Circuits
Provides a low-noise 3.0V rail for sensors and operational amplifiers that are sensitive to supply ripple.
Embedded Microcontroller Supplies
Acts as a stable local regulator for low-power MCUs in industrial control boards and motor drives.
RF and Antenna Systems
Supplies clean power to active antenna systems and land mobile radios where noise interference must be minimized.

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) 3V

Getting Started

When designing with this LDO, ensure a high-quality capacitor is placed near the output pin to maintain stability as specified in the datasheet. The enable pin (pin 3) can be tied to the input voltage for continuous operation or controlled by a GPIO for power sequencing. For rapid prototyping, this SOT-23 part can be used with standard SOT-23 to DIP breakout boards on a breadboard.