Texas Instruments LM2674MX-5.0/NOPB

Mfr. Part

LM2674MX-5.0/NOPB

Manufacturer

Luminary Micro/Texas Instruments (TI). Y-IC is a quality distributor for this brand, committed to delivering genuine parts, fast delivery, and professional technical support to help you choose and use the product with confidence.

Detailed Description

5 V fixed-output, step-down (buck) DC-DC switching regulator from TI’s SIMPLE SWITCHER series. Delivers up to 500 mA from a wide 6.5 V to 40 V input range. Non-synchronous topology (uses an external Schottky catch diode). 260 kHz fixed switching frequency for simpler EMI filtering. Housed in an 8‑SOIC surface-mount package. RoHS3 compliant lead-free “NOPB” version.

Key Features

Input voltage range 6.5 V to 40 V for use from automotive, industrial, and 24 V rails

Fixed 5 V output for fast design-in where a regulated 5 V rail is needed

Up to 500 mA continuous load current

260 kHz fixed frequency for compact magnetics and predictable design

Positive buck topology, non-synchronous (external diode required)

One output channel

Enable/ON-OFF control pin for shutdown and power sequencing

Internal cycle-by-cycle current limit and thermal shutdown for protection

SIMPLE SWITCHER family: well-documented design equations, reference designs, and proven stability

Operating junction temperature −40°C to +125°C

RoHS3 compliant “NOPB” lead finish

Key Advantages

Wide input tolerance (up to 40 V) handles transients on 12 V/24 V industrial and automotive supplies

Stable, simple design with fixed frequency and SIMPLE SWITCHER ecosystem (inductor/diode/cap selection is straightforward)

Good efficiency across a wide load range for a non-synchronous regulator when paired with a low-loss Schottky diode

Compact 8‑SOIC footprint reduces PCB area compared to older regulators

Robust protection (current limit, thermal shutdown) improves reliability in harsh environments

Enable pin allows low-power standby and easy system control

Packaging

Shipping format: Tape & Reel (TR) for automated SMT assembly

Device package: 8‑SOIC (JEDEC standard), body width approx. 3.90 mm (0.154 inch)

Mounting type: Surface mount

Pin configuration: 8 leads including VIN, GND, SW (switch node), ON/OFF (enable), and internal feedback for fixed version; see datasheet for exact pin assignment and any no-connects

Material and finish: Molded epoxy package, lead-free “NOPB”; RoHS3 compliant lead finish (refer to TI package data for exact plating and MSL)

Thermal characteristics: Junction operating range −40°C to +125°C; use ample copper around GND/SW pins for heat spreading; follow PCB layout guidance in the datasheet for best thermal and EMI performance

Electrical properties summary:

- Function: Step-down (buck), non-synchronous

- Output: 5 V fixed, up to 500 mA

- Input: 6.5 V to 40 V

- Switching frequency: 260 kHz

- Output configuration: Positive

- External components: Requires inductor, output/input capacitors, and a fast Schottky diode

Lifecycle

Status: Active, mainstream SIMPLE SWITCHER device; not near discontinuation based on current TI portfolio

Direct family alternatives (pin-to-pin within LM2674 family, same 500 mA rating):

- LM2674MX-3.3/NOPB (fixed 3.3 V)

- LM2674MX-12/NOPB (fixed 12 V)

- LM2674MX-15/NOPB (fixed 15 V)

- LM2674MX-ADJ/NOPB (adjustable output)

Functional alternatives from TI (not pin-compatible; different performance/features):

- LM2842 family (up to ~600 mA, wide VIN, higher switching frequencies)

- TPS54160 family (wide VIN up to 60 V, 1.5 A capability)

- TPS54202/TPS5420 (various 2 A options for designs needing more current)

- LM2594-5.0 (0.5 A legacy buck at lower switching frequency; check layout and pinout)

If you need a footprint-compatible drop-in other than the LM2674 variants, or guidance on second sources and upgraded options, please contact our sales team via the Y-IC website for the latest cross-reference support.

Key Application Areas

Industrial control and factory automation (24 V bus to 5 V logic and sensors)

Automotive and transportation (12 V/24 V systems to 5 V loads; design per automotive transient guidelines)

Building and home automation controllers

Communications and networking equipment power rails

Embedded systems, MCUs, FPGAs, and digital IC 5 V supplies

Battery-powered tools and equipment where wide VIN and robust protection are needed

General-purpose 5 V rails from unregulated or noisy inputs

Datasheet

Y-IC provides the most authoritative and up-to-date datasheet for LM2674MX-5.0/NOPB on our product page. We recommend downloading it directly from our site to get exact pinouts, layout recommendations, design equations, and thermal/EMI guidance.

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