About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsTPS628681ARQYR
TPS628681ARQYR Image
TPS628681ARQYR Image - 1
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

TPS628681ARQYR - Texas Instruments

Manufacturer Part Number
TPS628681ARQYR
Manufacturer
Texas Instruments
Allelco Part Number
32D-TPS628681ARQYR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
42,394 pcs available, New & Original
Parts Description
5.5-V 4-A SYNCHRONOUS STEP-DOWN
Package
9-VQFN-HR (1.5x2.5)
Data sheet
TPS628681ARQYR.pdf

PCN Design/Specification

TPS62868x 02/Aug/2021.pdf
RoHs Status
 
Compare
Our certification
In stock: 42394

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

TPS628681ARQYR Tech Specifications
Texas Instruments - TPS628681ARQYR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS628681ARQYR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 0.4V
Voltage - Output (Max) 1.675V
Voltage - Input (Min) 2.4V
Voltage - Input (Max) 5.5V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package 9-VQFN-HR (1.5x2.5)
Series -
Package / Case 9-VFQFN
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Programmable
Output Configuration Positive
Operating Temperature -40°C ~ 125°C (TJ)
Number of Outputs 1
Mounting Type Surface Mount
Function Step-Down
Frequency - Switching 2.4MHz
Current - Output 4A

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status Not applicable
Moisture Sensitivity Level (MSL) 2 (1 Year)
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

TPS628681ARQYR Image
TPS628681ARQYR (1)

Manufacturer Part Number

TPS628681ARQYR

Manufacturer

Texas Instruments

Introduction

High-efficiency, step-down switching regulator designed for portable and space-constrained applications.

Product Features and Performance

Supports Buck topology

Programmable output voltage

High-frequency operation at 2.4MHz minimizes the size of external components

Synchronous rectification for improved efficiency

Up to 4A output current

Low minimum input voltage of 2.4V suitable for battery-powered devices

High maximum input voltage of 5.5V for versatility in different circuit designs

Wide output voltage range from 0.4V to 1.675V

Thermal performance enhanced by surface mount technology

Product Advantages

Optimized for portable devices

Compact QFN package saves board space

High efficiency across the load range

Fast transient response

Adjustable output voltage for diverse applications

Integrated components reduce external part count

Low shutdown current extends battery life

Key Technical Parameters

Input Voltage Range: 2.4V to 5.5V

Output Voltage Range: 0.4V to 1.675V

Output Current: 4A

Switching Frequency: 2.4MHz

Operating Temperature Range: -40°C to 125°C

Quality and Safety Features

Built-in over-temperature and over-current protection

Stable with ceramic and low-ESR capacitors

Reliable performance under extended temperatures

Compatibility

Compatible with a broad range of MCUs and processors due to the adjustable output voltage

Can be used with a variety of external components

Application Areas

Smartphones

Tablets

Portable electronics

Wireless modems

Power banks

Product Lifecycle

Active status, not currently nearing discontinuation

Future product availability or possible upgrades should be checked with Texas Instruments directly

Several Key Reasons to Choose This Product

High efficiency saving battery life for portable devices

Low input voltage supports single Li-Ion cell applications

High level of integration for a reduced footprint on PCB

Texas Instruments' reliable design and robust quality

Strong technical support and documentation from Texas Instruments

High switching frequency allows for smaller external components, reducing overall solution size

Design versatility for use in multiple product designs with various power requirements

Frequently Asked Questions(FAQ)

What are the key design constraints when using the TPS628681ARQYR in a battery-powered system with a 3.7V Li-ion source?
The TPS628681ARQYR supports an input voltage range of 2.4V to 5.5V, making it suitable for a fully charged 3.7V Li-ion battery without requiring additional regulation. However, deep discharge below 2.4V may cause the regulator to fail to start or operate unstably. At full charge (up to 4.2V), the device operates efficiently in buck mode, delivering up to 4A output current while maintaining high efficiency—typically above 90% at moderate loads due to synchronous rectification and 2.4MHz switching frequency. Designers should ensure adequate PCB layout headroom for inductor selection and thermal management, especially near maximum load conditions.
How does the programmable output voltage feature of the TPS628681ARQYR benefit system-level power optimization compared to fixed-voltage regulators?
Unlike fixed-output regulators, the TPS628681ARQYR allows precise adjustment of its output between 0.4V and 1.675V via an external resistor divider connected to the FB pin. This enables fine-tuned voltage scaling for low-power processors or memory interfaces, reducing dynamic power consumption by matching supply voltage to computational demand. For example, a processor operating at 0.8V instead of 1.0V can reduce power dissipation by approximately 36% under constant load, significantly extending battery life in portable applications.
In what scenarios would the TPS628681ARQYR be preferred over the TPS628681AQCR, considering both performance and application requirements?
While both share core functionality, the TPS628681ARQYR features a 2.4MHz switching frequency and supports higher input voltages (up to 5.5V) compared to the AQCR variant. This makes the ARQYR more suitable for systems requiring wide input compatibility, such as USB-powered devices or dual-cell alkaline/NiMH configurations. Additionally, the ARQYR’s enhanced thermal performance and tighter output voltage tolerance make it ideal for precision analog subsystems where stability under varying load transients is critical.
What impact does the 2.4MHz switching frequency have on component size and electromagnetic interference (EMI) when implementing the TPS628681ARQYR?
The 2.4MHz switching frequency enables the use of smaller passive components—inductors and capacitors—due to reduced required inductance and capacitance values, which directly benefits space-constrained designs like wearables or IoT nodes. However, higher-frequency operation increases conducted EMI risk, necessitating careful PCB layout with short feedback traces, proper ground planes, and potential shielding. Designers must verify compliance with CISPR standards using decoupling capacitors close to input/output pins and minimizing loop areas in current paths.
Can the TPS628681ARQYR safely deliver 4A continuous output from a single cell Li-ion battery during transient load spikes?
Yes, but with caveats. The datasheet specifies a continuous output current of 4A under typical ambient conditions with adequate heat sinking. During transient load steps (e.g., from 1A to 4A within microseconds), the internal compensation and control loop maintain regulation if input capacitance is sufficient and the input source can sustain the surge. However, prolonged operation at full 4A load without thermal derating risks exceeding junction temperature limits unless board-level cooling is implemented, particularly in compact form factors.
How does the Moisture Sensitivity Level (MSL) rating of 2 affect assembly planning for products using the TPS628681ARQYR?
With an MSL of 2, the TPS628681ARQYR requires baking only if stored beyond one year in humid environments before reflow soldering. This simplifies inventory handling compared to Level 3 devices, reducing manufacturing overhead. Manufacturers should still adhere to standard JEDEC guidelines—storing parts in dry packs with desiccant during long-term storage—to prevent moisture absorption that could lead to popcorning during reflow, especially in lead-free processes exceeding 245°C peak temperature.
What considerations apply when selecting the external inductor for optimal efficiency with the TPS628681ARQYR?
Inductor choice critically affects efficiency and stability. Due to the 2.4MHz operation, a low-DCR, shielded ferrite core inductor rated for at least 5A saturation current is recommended. Core losses increase at high frequency, so selecting a material optimized for MHz-range operation (e.g., powder iron or composite types) minimizes core loss. Additionally, the inductor must support the desired ripple current; typically, 30–40% of max output current ensures good efficiency without excessive heating. Always verify phase margin stability across load range using TI’s WEBENCH tools.
Does the TPS628681ARQYR require external compensation, and how does this simplify layout complexity?
No, the TPS628681ARQYR uses an internally compensated architecture, eliminating the need for external compensation networks. This reduces component count, simplifies design iterations, and enhances robustness against parasitic effects from poor PCB layout. The integrated soft-start and slope-compensation further improve transient response, making it easier to meet stringent voltage deviation requirements during load changes without iterative tuning.
How does synchronous rectification in the TPS628681ARQYR improve system efficiency compared to asynchronous topologies?
Synchronous rectification replaces the diode in the freewheeling path with a low-RDS(on) MOSFET, reducing conduction losses—especially at higher output currents and lower output voltages. For instance, at 1A output and 0.4V VOUT, the TPS628681ARQYR achieves >92% efficiency versus <85% in comparable asynchronous designs. This translates into longer battery life and reduced thermal stress, allowing smaller heatsinks or even air-cooled operation in compact enclosures.
Are there any limitations in using the TPS628681ARQYR for always-on industrial control circuits operating at -40°C?
The device is qualified over -40°C to +125°C junction temperature, meeting industrial temperature requirements. However, cold-start behavior must be validated: at -40°C ambient, input capacitance and bulk capacitance ESR become critical for startup reliability. Adequate input capacitance (>10µF ceramic with X7R dielectric) and low-ESR bulk capacitors ensure sufficient charge delivery during initial turn-on. Additionally, output capacitor selection must consider low-temperature capacitance stability to avoid droop during slow ramping loads.
What role does the EN pin play in enabling safe shutdown and sequencing for systems integrating the TPS628681ARQYR?
The EN pin provides logic-level enable control with a typical threshold around 0.8V, allowing integration into power sequencing schemes. Pulling EN low disables the regulator, cutting quiescent current to less than 1µA in shutdown mode, which extends battery life in sleep states. For sequencing-sensitive applications (e.g., FPGAs), the EN pin can coordinate turn-on/off timing relative to other rails using RC delays or supervisor ICs to prevent inrush current or undefined state conditions.
How does the small 9-VQFN-HR (1.5x2.5mm) package influence thermal performance during high-current operation of the TPS628681ARQYR?
Despite its miniature footprint, the exposed pad on the bottom provides excellent thermal conductivity to the PCB copper plane. When properly soldered and connected to a solid ground plane, the thermal resistance can approach 30–40°C/W, enabling reliable 4A operation with moderate airflow or natural convection. Without thermal vias or extensive copper, junction temperatures may rise rapidly during sustained loads, necessitating conservative derating or active cooling in dense assemblies.
Can the TPS628681ARQYR support discontinuous conduction mode (DCM) operation, and what are the implications for light-load efficiency?
Yes, the device transitions into pulse-skipping DCM at light loads to minimize switching losses. While this improves light-load efficiency (often >85% at 10mA), it introduces audible noise near the 2.4MHz carrier and increases output voltage ripple slightly. Designers targeting ultra-low-power modes should consider external forced PWM modes if ripple sensitivity is unacceptable, though the TPS628681ARQYR does not offer explicit mode control—ripple characteristics are inherent to its automatic DCM/PWM transition logic.
What precautions should be taken regarding ESD protection when handling the TPS628681ARQYR in production environments?
As a sensitive CMOS device, the TPS628681ARQYR should be handled per ANSI/ESD S20.20 standards using grounded wrist straps, ESD-safe workstations, and conductive packaging during transport. Although not specifically rated for HBM beyond standard levels, improper handling can degrade reliability, especially at high switching frequencies where gate oxide stress accumulates over time. Always store unused boards in anti-static bags and avoid contact with non-grounded conductors during assembly.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TPS628681ARQYR

Product Attribute TPS628680ARQYR TPS6286810CRQYR TPS628691ARQYR TPS6286820CRQYR
Part Number TPS628680ARQYR TPS6286810CRQYR TPS628691ARQYR TPS6286820CRQYR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Voltage - Input (Max) - - - -
Series - - - -
Frequency - Switching - - - -
Output Configuration - - - -
Function - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount
Output Type - Current - Unbuffered Voltage - Buffered -
Synchronous Rectifier - - - -
Voltage - Output (Max) - - - -
Number of Outputs - - - -
Current - Output - - - -
Voltage - Input (Min) - - - -
Topology - - - -
Voltage - Output (Min/Fixed) - - - -

TPS628681ARQYR Datasheet PDF

Download TPS628681ARQYR pdf datasheets and Texas Instruments documentation for TPS628681ARQYR - Texas Instruments.

PCN Assembly/Origin
Assembly Materials 03/Aug/2021.pdf
PCN Design/Specification
TPS62868x 02/Aug/2021.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
TPS628681ARQYR Image

TPS628681ARQYR

Texas Instruments
32D-TPS628681ARQYR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB