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LM5143RHJR

Sync buck controller, 4.5-65V, 2.2MHz, VQFN-32

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Manufacturer Part：

LM5143RHJR

Package：

VQFN-32

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Description

Product Overview

The Texas Instruments LM5143RHJR is a Sync buck controller, 4.5-65V, 2.2MHz, VQFN-32. It drives external N-channel MOSFETs for high-efficiency synchronous buck conversion in telecom, industrial, and automotive power systems.

Key Specifications

Input Voltage 4.5-65V
Switching Frequency 2.2MHz
Package VQFN-32

Features

  • External MOSFET drive for design flexibility
  • Current mode control
  • Adjustable switching frequency
  • Power good and enable functions

Applications

  • Telecom base station power
  • Industrial 24V/48V systems
  • Automotive infotainment power
  • Server and storage power supplies

The LM5143RHJR from Texas Instruments is a synchronous buck controller operating from 4.5-65V input with 2.2MHz switching frequency in a VQFN-32 package. It drives external N-channel MOSFETs for high-efficiency power conversion in telecom, industrial, and automotive applications.

The controller uses peak current mode control. An error amplifier compares the output voltage feedback with an internal reference. The error signal controls the peak inductor current through a PWM comparator. The high-side gate driver turns on the external high-side MOSFET, and the low-side driver controls the synchronous MOSFET. Adaptive dead-time control prevents shoot-through current.

Pin Name Description
VIN Input voltage sense Analog input
SW Switch node Power
BOOT Bootstrap capacitor Supply
HG High-side gate drive Output
LG Low-side gate drive Output
FB Output voltage feedback Analog input
COMP Error amplifier output Analog
SS Soft-start Analog
  • 48V telecom to point-of-load conversion
  • Industrial 24V bus to 5V/3.3V regulation
  • Automotive 12V battery to logic power
  • Server VRM multi-phase controller
Model Brand Vin Notes
ISL6520CBZ Renesas 5-12V Single output
NCP51111DR2G onsemi 4.5-65V Automotive grade
BD9G341AEFJ-E2 ROHM 7-36V Integrated driver
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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.

1. Authorized & Genuine Sourcing Promise

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.

2. Strict Full-batch Quality Inspection

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.

3. Industry Standard Compliance

Our products comply with a variety of international industry quality standards to adapt to high-standard application scenarios:
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4. Professional Reliability Control

For static-sensitive, moisture-sensitive and precision components such as ICs, PCBs, sensors and connectors, we carry out reliability screening in advance. Combined with standardized ESD anti-static packaging and vacuum moisture-proof packaging, we avoid component damage caused by static electricity, dampness or collision during storage and transportation, and retain the original performance of products.

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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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4. Customs & Liability Statement

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5. Local Pickup in Shenzhen

Local pickup service is available for customers in Shenzhen and surrounding areas:
  • Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
  • Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
  • Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.

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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We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

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6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

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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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