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LM2674MX-5.0/NOPB

40V 500mA buck, 5V fixed, 260kHz, SOIC-8

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Manufacturer Part：

LM2674MX-5.0/NOPB

Package：

8-Pin SOIC (4.9 x 3.9 x 1.5 mm)

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Description

Product Overview

The LM2674MX-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER 40V 500mA step-down buck regulator with 5V fixed output, 260kHz switching, and ±1.5% output tolerance. Packaged in SOIC-8, -40°C to +125°C. Requires only 5 external components.

Key Specifications

Input Voltage 8 V to 40 V
Output Voltage 5 V fixed
Output Current 500 mA
Frequency 260 kHz fixed
Efficiency Up to 96%
RDS(on) Switch 0.25 Ω DMOS
Package SOIC-8 (D)

Features

  • 8V to 40V wide input range
  • 500mA guaranteed output current
  • 260kHz fixed frequency oscillator
  • Only 5 external components required
  • ±1.5% output voltage tolerance
  • 0.25Ω DMOS output switch
  • Thermal shutdown and current limit

Applications

  • 12V to 5V point-of-load conversion
  • 24V industrial bus power supply
  • Automotive auxiliary power
  • Distributed power systems

The LM2674MX-5.0/NOPB is a Texas Instruments SIMPLE SWITCHER series monolithic step-down switching voltage regulator with a fixed 5V output, capable of driving 500mA loads with excellent line and load regulation. Built with a LMDMOS process, the device integrates a 0.25Ω DMOS output switch, 260kHz fixed-frequency oscillator, and patented internal frequency compensation, requiring only five external components (input capacitor, output capacitor, bootstrap capacitor, catch diode, and inductor). The 8V to 40V input range supports 12V and 24V industrial rails. The ±1.5% output voltage tolerance over line and load conditions ensures reliable 5V logic supply. Efficiency exceeds 90% at moderate loads, allowing the PCB copper traces to serve as the only heat sinking required. The 260kHz switching frequency enables smaller inductor and capacitor values than lower-frequency designs. The NOPB suffix indicates Pb-free (lead-free) finish. The MX suffix denotes SOIC-8 package with 2500-unit large tape-and-reel. TTL-compatible shutdown provides 50µA standby current. Thermal shutdown and current limit protect under fault conditions.

The LM2674 operates as a fixed-frequency, current-mode buck converter. The internal 260kHz oscillator sets the switching period. During each on-time, the DMOS switch connects the input voltage to the inductor, causing the inductor current to ramp up linearly. The current-mode control loop compares the peak inductor current with the error amplifier output to determine the switch on-time. When the switch turns off, the inductor current flows through the external catch diode to the output. The patented active inductor and active capacitor internal compensation networks provide stability without requiring external compensation components. The 0.25Ω DMOS switch minimizes conduction losses. Current limiting is implemented by clamping the peak switch current. Thermal shutdown disables the switch when the junction temperature exceeds approximately 175°C.

Pin Mnemonic Description
1 CBOOT Bootstrap capacitor for switch driver
2 SW Switch output (to inductor)
3 ON/OFF Shutdown control (active low)
4 FB Feedback (5V fixed: connect to output)
5 GND Ground
6 GND Ground
7 VIN Input supply (8-40V)
8 CB Boost capacitor for high-side driver
  • 12V automotive to 5V MCU power with 5-component minimum design
  • 24V industrial bus to 5V PLC supply with 96% peak efficiency
  • Distributed 12V-to-5V POL conversion with 260kHz for compact magnetics
  • Battery-powered 9V-to-5V converter with TTL shutdown for power gating
Model Manufacturer Key Difference
LM2674MX-3.3/NOPB TI 3.3V fixed output
LM2674MX-ADJ/NOPB TI Adjustable output (1.21-37V)
LM2675MX-5.0/NOPB TI 1A output, same family
LMR16006YDDCR TI Modern 60V 600mA replacement
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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All of our electronic components are procured from official authorized distributors and original manufacturers. We strictly reject counterfeits, refurbished parts, disassembled components and gray-market goods. Every product is guaranteed to be brand-new original parts and fully consistent with the original technical parameters. For branded products such as NXP IC series, we maintain complete supply channel documents to realize full product traceability.

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We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

Shipping & Payment

Materialparts is a professional global supplier of electronic components with over 20 years of industry experience. We provide one-stop supply of passive components, integrated circuits, as well as parts for industrial control, automotive electronics, consumer electronics and medical devices. Below are the unified shipping and payment policies applicable to all orders, samples and bulk purchases worldwide.

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5. Local Pickup in Shenzhen

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Professional Packaging Standards

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We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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