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LMR23630AFDDA

3.5A 36V synchronous buck converter, 400kHz/2.2MHz, 25µA Iq, SOIC-8 PowerPAD

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Manufacturer Part：

LMR23630AFDDA

Package：

SOIC-8 with PowerPAD (4.9 x 3.9mm)

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Description

Product Overview

The LMR23630AFDDA from Texas Instruments is a 3.5A, 36V synchronous step-down converter in an SOIC-8 package with PowerPAD. With selectable 400kHz/2.2MHz switching frequency and 25µA quiescent current, it delivers up to 92% efficiency for industrial and automotive power supply applications.

Key Specifications

Input Voltage 4V – 36V
Output Current 3.5A
Switching Frequency 400kHz / 2.2MHz (selectable)
Quiescent Current 25µA (typ)
Shutdown Current 1µA
Efficiency Up to 92%
RDS(on) High-Side 85mΩ
RDS(on) Low-Side 55mΩ
Operating Temperature -40°C to +125°C
Package SOIC-8 (DDA suffix, PowerPAD)

Features

  • 4V-36V wide input range for automotive and industrial rails
  • Selectable 400kHz or 2.2MHz switching for flexibility
  • 25µA ultra-low quiescent current in PFM mode
  • Integrated 85mΩ/55mΩ MOSFETs for high efficiency
  • Peak current mode control for fast transient response
  • Internal soft-start, current limit, and thermal shutdown

Applications

  • Automotive infotainment and ADAS power supplies
  • Industrial 24V bus point-of-load conversion
  • Telecom and networking equipment power rails
  • Battery-powered instrumentation

The LMR23630AFDDA is a 3.5A synchronous step-down converter from Texas Instruments featuring a wide 4V-36V input range, making it ideal for automotive and industrial applications powered from 12V or 24V buses. The device offers selectable switching frequencies of 400kHz or 2.2MHz, allowing designers to optimize for either efficiency or solution size. With 25µA quiescent current and integrated 85mΩ/55mΩ MOSFETs, it achieves up to 92% efficiency while maintaining excellent light-load performance.

The LMR23630AFDDA uses peak current mode control with a fixed-frequency oscillator. The error amplifier compares a fraction of the output voltage with the internal reference, generating a control voltage that sets the peak inductor current. The high-side N-channel MOSFET is turned on at the clock edge and turned off when the peak current threshold is reached, while the low-side MOSFET conducts during the off-time. In light-load conditions, the device enters PFM mode, skipping pulses to reduce switching losses and maintain high efficiency. The integrated slope compensation prevents sub-harmonic oscillation at duty cycles above 50%.

Pin Name Description
1 BOOT Bootstrap capacitor for high-side driver
2 VIN Input supply (4-36V)
3 EN Enable input (internal pull-up)
4 RT/SYNC Frequency programming or external sync
5 FB Feedback voltage (1.0V reference)
6 AGND Analog ground
7 SW Switching node (inductor connection)
8 PGND Power ground
Pad PGND Exposed thermal pad (PGND)
  • 12V/24V automotive bus to 5V/3.3V point-of-load conversion
  • Industrial 24V rail power supply for PLCs and sensors
  • Telecom -48V (post-isolation) to logic rail conversion
  • Battery-powered portable instrumentation
Model Manufacturer Vin Iout Frequency
LMR23630CDDA TI 4-36V 3.5A 400kHz/2.2MHz
TPS54360 TI 4.5-60V 3.5A 500kHz
BD9G341AEFJ Rohm 4.5-36V 3A 500kHz
AP64356 Diodes Inc 4-36V 3.5A 500kHz
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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:
  • Automotive Electronics: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
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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.

5. Traceability Management System

We establish a complete product traceability system. Each batch of goods corresponds to independent batch number, sourcing record, inspection record and delivery record. Customers can query the whole lifecycle information of components at any time. This system effectively solves quality risks and facilitates after-sales handling and production quality control for your company.

6. After-sales Quality Guarantee

If any product is confirmed to have non-conformity quality problems due to our reasons after receipt, we provide free return, exchange and supplementary delivery services. Our professional quality team will also conduct root cause analysis to optimize our quality control process. We respond to quality feedback within 24 hours to resolve your worries efficiently.

Contact Us

If you have inquiries about our quality standards, inspection procedures or product certification documents, 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

 

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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We offer a variety of secure and convenient payment methods to meet diverse business cooperation needs. Details are as follows:
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    US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.

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  • Air Freight: 7 – 12 working days
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    Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.

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    We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.

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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.

Core Services

1. One-stop Sourcing & BOM Support

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.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

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.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
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2. Classified Professional Packaging

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  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

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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