Texas Instruments LP2981IM5X-3.0/NOPB

Mfr. Part

LP2981IM5X-3.0/NOPB

Manufacturer

Texas Instruments (TI). Y-IC is a quality distributor of TI. We supply original parts, best-in-class service, fast delivery, and strong technical support.

Detailed Description

3.0 V fixed low-dropout (LDO) linear regulator, 100 mA output, positive regulator. Small SOT‑23‑5 package with enable and noise-bypass pins. Wide input up to 16 V. Industrial temperature range −40°C to +125°C. RoHS3 compliant, lead-free NOPB.

Key Features

Fixed 3.0 V output

100 mA max load current

Low dropout: 0.37 V max at 100 mA

High PSRR: 63 dB at 1 kHz

Low quiescent current: ~95 μA typ

Max supply current: 1.7 mA

Input voltage up to 16 V

Enable pin for shutdown control

Bypass pin for reduced output noise

Protections: short circuit, overcurrent, thermal shutdown

One regulator channel

Mounting: surface mount (SMT)

RoHS3 compliant, lead-free

Key Advantages

Saves power and extends battery life with low Iq

Handles higher and noisy input rails while keeping a clean 3.0 V output

Low noise with bypass pin and strong PSRR for sensitive analog/RF loads

Very small footprint (SOT‑23‑5) for tight PCB spaces

Simple to use, minimal external components

Robust operation with full protection set

Packaging

Supply format: Tape and Reel (TR) for automated assembly

Package type: SOT‑23‑5 (JEDEC SC‑74A, SOT‑753), TI package code DBV

Material: Molded epoxy body, copper alloy leadframe, matte tin plating; lead‑free NOPB; RoHS3 compliant

Size: about 2.9 mm × 1.6 mm × 1.1 mm body, 0.95 mm pin pitch (confirm exact dimensions in datasheet)

Pin configuration (typical, confirm in datasheet):

1 EN (enable/shutdown)

2 GND

3 IN

4 BYP (noise bypass)

5 OUT

Thermal characteristics: junction‑to‑ambient thermal resistance is board‑dependent; TI’s SOT‑23‑5 is typically around the 200°C/W range on a standard JEDEC board; integrated thermal shutdown

Key electrical properties (summary): 3.0 V fixed output, 100 mA max load, 0.37 V max dropout at 100 mA, PSRR 63 dB at 1 kHz, quiescent current ~95 μA typ, input up to 16 V

Lifecycle

Current status: Active and widely used; not near discontinuation based on available public information

Equivalent or alternative models to consider (verify pinout, startup behavior, stability caps, and limits before use):

- TI TLV76130DBVR — 100 mA, up to 16 V input, SOT‑23‑5, 3.0 V fixed, with enable

- TI TLV70430DBVR — 150 mA, up to 30 V input, SOT‑23‑5, 3.0 V fixed

- TI TPS70930DBVR — 150 mA, up to 30 V input, SOT‑23‑5, 3.0 V fixed

- TI LP2950‑3.0 — 100 mA, up to 30 V input (different packages; check options)

- ADI LT1761‑3 — 100 mA, up to 20 V input, SOT‑23‑5 (non‑TI)

If you need a drop‑in equivalent or other cross references, please contact the Y-IC sales team on our website for tailored recommendations

Key Application Areas

Portable and battery-powered devices needing a clean 3.0 V rail

Sensors, IoT nodes, handheld instruments

Post‑regulation after a DC/DC converter to lower ripple and noise

Low‑noise rails for MCUs, DSPs, RF, and precision analog blocks

Industrial and instrumentation systems within −40°C to +125°C

Datasheet

Y-IC provides the most authoritative and up‑to‑date datasheet for LP2981IM5X-3.0/NOPB on this product page. Please download it here for full specifications, pinout, typical performance curves, PCB layout notes, and application guidance.

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