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TPS61251DSGR

3.5MHz sync boost, 5V/800mA, WSON-8, true shutdown, input discharge, Li-Ion to 5V

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制造商零件：

TPS61251DSGR

包装：

WSON-8 (4.00 x 4.00 x 0.80 mm, exposed pad)

品牌：
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说明

产品概览

The TPS61251DSGR from Texas Instruments is a 3.5MHz synchronous boost converter with 5V output and 800mA switch current in a WSON-8 package. With true shutdown and input discharge, it provides 3.3V-to-5V conversion for USB OTG and peripheral power.

主要规格

输入电压 1.9 V to 5.5 V
Output Voltage 5.0 V (fixed)
Switch Current 800 mA
开关频率 3.5 MHz
Efficiency Up to 93%
工作温度 -40C to +85C

特点

  • 3.5MHz high-frequency switching for tiny external components
  • 5V fixed output with 800mA switch current from single-cell Li-Ion
  • True shutdown with input discharge feature
  • Average current limit for input current control
  • Synchronous rectification for high efficiency
  • WSON-8 package with exposed thermal pad

应用

  • USB OTG 5V power supply from Li-Ion battery
  • White LED driver and flash power supply
  • Portable instrument 5V rail generation
  • Smartphone peripheral power boost

The TPS61251DSGR from Texas Instruments is a 3.5MHz synchronous boost converter with a fixed 5.0V output in a WSON-8 package. The device is designed to generate a 5V rail from a single-cell Li-Ion or Li-Polymer battery (2.7V to 4.5V) for USB OTG, peripheral power, and white LED applications. The 3.5MHz switching frequency enables the use of chip-scale inductors and small ceramic capacitors, minimizing solution size. The 800mA switch current limit supports output currents up to approximately 400mA from a 3.3V input. Synchronous rectification eliminates the external Schottky diode and improves efficiency up to 93%. The true shutdown feature completely disconnects the input from the output when disabled, preventing battery drain through the inductor. An input discharge feature actively discharges the output capacitor when the device is disabled, ensuring a clean power-down sequence. Average input current limiting protects the battery from excessive discharge current. The device uses average current-mode control with internal compensation for stable operation across input voltage and load conditions.

The TPS61251DSGR uses a synchronous boost topology with average current-mode control. (1) Boost Converter: During the on-time, the high-side switch connects the inductor to ground, ramping up inductor current. During the off-time, the low-side synchronous switch connects the inductor to the output, transferring stored energy. The output voltage is higher than the input voltage. (2) Average Current-Mode Control: An inner current loop regulates the average inductor current, while an outer voltage loop regulates the output voltage. The current loop bandwidth is higher than the voltage loop, providing fast response to input voltage transients and ensuring stable operation. Internal compensation simplifies design. (3) Synchronous Rectification: The low-side MOSFET replaces the external Schottky diode, reducing conduction losses and improving efficiency. The body diode of the low-side MOSFET conducts during the dead-time between switches. (4) True Shutdown: When disabled, both switches are off and the input is disconnected from the output through the inductor. Only a small leakage current flows from input to output. (5) Input Discharge: An internal discharge resistor is connected across the output when the device is disabled, draining the output capacitor within a few milliseconds.

针脚 名称 类型 功能
1 VIN 电源 Input supply (1.9-5.5V)
2 L 输出 Inductor connection / switch node
3 PGND 地面 Power ground
4 VOUT 输出 5V output
5 FB 输入 Feedback (internal for fixed 5V)
6 EN 输入 Enable (active high)
7 ILIM 输入 Current limit programming
8 AGND 地面 Analog ground
  • USB OTG 5V power supply from single-cell Li-Ion battery
  • White LED driver and flash power supply at 800mA switch current
  • Portable instrument 5V rail generation with true shutdown
  • Smartphone peripheral power boost with 3.5MHz compact design
制造商 部件编号 包装 说明
TI TPS61252YFFR DSBGA-6 5V, smaller package
TI TPS610993YFFR DSBGA-6 5V, 1A switch, ultra-small
MPS MP3414GR-Z QFN-8 5V boost, 1.5MHz
Monolithic Power MP3423AGJ-Z TSOT23-8 5V boost, 1.5A
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质量保证

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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  • Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.

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.

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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.

联系我们

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

 

发货与付款

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.

1. Payment Terms

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

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We partner with leading global logistics providers to ensure safe and fast delivery worldwide. Relevant details are listed below:
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  • Economy Logistics: Air freight and sea freight for large-volume cargo
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  • Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
  1. Estimated Transit 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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    All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.

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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

服务与包装

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

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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

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  • 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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