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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsTPS54521RHLR
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TPS54521RHLR - Texas Instruments

Manufacturer Part Number
TPS54521RHLR
Manufacturer
Texas Instruments
Allelco Part Number
32D-TPS54521RHLR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
33,067 pcs available, New & Original
Parts Description
IC REG BUCK ADJUSTABLE 5A 14VQFN
Package
14-VQFN (3.5x3.5)
Data sheet
TPS54521RHLR.pdf

HTML Datasheet

TPS54521.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 33067
  • Unit Price: $0.856
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.856 $0.86
10+ $0.75 $7.50
30+ $0.687 $20.61
100+ $0.424 $42.40
500+ $0.394 $197.00
1000+ $0.381 $381.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

TPS54521RHLR Tech Specifications
Texas Instruments - TPS54521RHLR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS54521RHLR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 0.8V
Voltage - Output (Max) 15V
Voltage - Input (Min) 4.5V
Voltage - Input (Max) 17V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package 14-VQFN (3.5x3.5)
Series -
Package / Case 14-VFQFN Exposed Pad
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Adjustable
Output Configuration Positive
Operating Temperature -40°C ~ 125°C (TJ)
Number of Outputs 1
Mounting Type Surface Mount
Function Step-Down
Frequency - Switching 200kHz ~ 900kHz
Current - Output 5A
Base Product Number TPS54521

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

TPS54521RHLR Image
TPS54521RHLR (1)

Manufacturer Part Number

TPS54521RHLR

Manufacturer

Texas Instruments

Introduction

The TPS54521RHLR is a high-performance, step-down, adjustable output voltage regulator from Texas Instruments, designed for a wide range of power management applications.

Product Features and Performance

Step-down (Buck) configuration for efficient power conversion.

Adjustable output voltage allows customization for various applications.

Support for synchronous rectification for improved efficiency.

Wide input voltage range from 4.5V to 17V suitable for diverse power sources.

Adjustable switching frequency from 200kHz to 900kHz enables optimization for efficiency and component size.

Capable of delivering up to 5A of output current to power demanding loads.

High-temperature operational capability from -40°C to 125°C.

Product Advantages

Flexibility in designing power supply circuits due to adjustable output voltage.

High efficiency and reduced heat due to synchronous rectification.

Suitable for compact designs thanks to its small 14-VFQFN package.

Wide input voltage range accommodates various power sources and systems.

Thermal and operational stability across a broad temperature range.

TPS54521RHLR Image
TPS54521RHLR (2)

Key Technical Parameters

Voltage Input (Min): 4.5V

Voltage Input (Max): 17V

Voltage Output (Min/Fixed): 0.8V

Voltage Output (Max): 15V

Current Output: 5A

Frequency Switching: 200kHz ~ 900kHz

Operating Temperature: -40°C ~ 125°C (TJ)

Mounting Type: Surface Mount

Package / Case: 14-VFQFN Exposed Pad

Quality and Safety Features

Built-in thermal overload protection.

Under-voltage lockout (UVLO) prevents operation at unsafe input voltages.

Overcurrent protection safeguards the device and the load.

Compatibility

Compatible with a wide range of input voltages and suitable for multi-voltage power systems.

The adjustable switching frequency allows for use with various inductor sizes and values.

Application Areas

Power supply for microprocessors and DSPs.

Powering FPGAs, ASICs, and other digital ICs.

Communications equipment, networking, and portable devices.

Product Lifecycle

The product is currently active and not nearing discontinuation.

Availability of replacements or upgrades can be checked on the Texas Instruments website.

Several Key Reasons to Choose This Product

High efficiency and versatility in voltage regulation for varying load conditions.

Compact and heat-resistant design suitable for space-constrained applications.

Broad compatibility and easy integration into existing and new designs.

Texas Instruments' reputation for reliability and quality assurance in power management components.

Support for high current output makes it suitable for power-intensive applications.

Frequently Asked Questions(FAQ)

What are the key thermal considerations when using the TPS54521RHLR in a compact 5A buck converter design?
The TPS54521RHLR operates across a junction temperature range of -40°C to 125°C and is housed in a 14-VQFN package with an exposed pad for improved thermal performance. At full load, power dissipation depends on input-to-output voltage differential and switching efficiency. For example, converting 12V to 3.3V at 5A results in approximately 45W of input power and around 2.2W of conduction and switching losses, necessitating careful PCB layout with thermal vias under the exposed pad and adequate copper area to maintain junction temperatures well below 125°C.
How does the TPS54521RHLR compare to other synchronous buck regulators in terms of efficiency and switching frequency flexibility?
Compared to fixed-frequency alternatives like the TPS562201, the TPS54521RHLR offers adjustable switching frequencies between 200kHz and 900kHz, enabling designers to optimize for size or efficiency. In high-current applications such as computing peripherals, operating at higher frequencies allows smaller inductors and capacitors but increases switching losses. Benchmarks show the TPS54521RHLR achieves over 92% efficiency at 3.3V output from a 12V rail at 5A load, outperforming lower-frequency designs in similar conditions due to its optimized gate drive and low RDS(on) MOSFETs.
Can the TPS54521RHLR be used in automotive-grade applications requiring extended temperature ranges?
While the TPS54521RHLR is rated for industrial temperatures (-40°C to 125°C), it is not qualified under AEC-Q100 standards. Therefore, it is not suitable for primary automotive functions where reliability under vibration, thermal cycling, and EMI is critical. However, it may be considered for non-safety-related infotainment or auxiliary systems if environmental stress testing confirms robustness beyond datasheet specifications.
What external components are critical for stable operation of the TPS54521RHLR, and how do they affect transient response?
Stable operation requires careful selection of inductor value, output capacitance, and feedback resistors. A typical design uses a 0.47µH to 1µH inductor with low DCR to handle 5A ripple current. Output capacitance should include a mix of ceramic and low-ESR tantalum or polymer types—typically 22µF to 68µF—to dampen subharmonic oscillations and support fast transient recovery. The compensation network (external to the IC) must be tuned based on load step requirements; without proper tuning, a 1A to 5A step may result in undershoot exceeding 100mV.
Is the TPS54521RHLR suitable for battery-powered devices with wide input voltage variations?
Yes, the TPS54521RHLR supports input voltages from 4.5V to 17V, making it appropriate for systems powered by lithium-ion batteries that discharge down to 3.0V (boosted) or dual-cell configurations up to 8.4V. During deep discharge, the dropout voltage remains low due to synchronous rectification, ensuring efficient regulation even when the input approaches 4.5V. This makes it ideal for portable instrumentation and IoT nodes where runtime and efficiency are prioritized.
How does the adjustable switching frequency feature impact EMI performance compared to fixed-frequency regulators?
Adjustable frequency allows spreading of spectral energy, reducing peak emissions at specific harmonics. When set above 600kHz, the TPS54521RHLR can minimize interference with audio circuits or wireless modules operating near 433MHz or 2.4GHz bands. However, this flexibility introduces trade-offs: lower frequencies increase magnetics size, while higher frequencies demand faster switching transistors and may degrade efficiency slightly. Careful PCB layout with ground planes and shielding remains essential regardless of frequency setting.
What protection mechanisms are built into the TPS54521RHLR to prevent damage during short-circuit or overload events?
The device includes cycle-by-cycle current limiting, thermal shutdown with hysteresis, and UVLO (under-voltage lockout). If output current exceeds 5A, the high-side FET turns off immediately, limiting duty cycle until current drops below threshold. Thermal shutdown activates when junction temperature exceeds 175°C, disabling the regulator until cooled. These protections enhance system reliability without requiring external fuses, though overcurrent conditions should still be managed via soft-start timing and output sequencing in safety-critical applications.
Can multiple TPS54521RHLR units be paralleled to increase total output current?
Direct parallel operation is not supported due to potential circulating currents and lack of phase interleaving. Instead, use separate regulators with independent feedback loops or consider Texas Instruments’ newer multi-phase controllers designed explicitly for current sharing. Attempting to parallel TPS54521RHLRs risks uneven load distribution and instability unless additional control circuitry ensures matched impedance and synchronized switching—features not present in this single-chip solution.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TPS54521RHLR

Product Attribute TPS54519RTER TPS54525PWPR TPS54526PWPR TPS54525PWPR-P
Part Number TPS54519RTER TPS54525PWPR TPS54526PWPR TPS54525PWPR-P
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Topology - - - -
Voltage - Output (Max) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Input (Max) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Synchronous Rectifier - - - -
Frequency - Switching - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Output Configuration - - - -
Function - - - -
Voltage - Input (Min) - - - -
Number of Outputs - - - -
Current - Output - - - -
Voltage - Output (Min/Fixed) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

TPS54521RHLR Datasheet PDF

Download TPS54521RHLR pdf datasheets and Texas Instruments documentation for TPS54521RHLR - Texas Instruments.

HTML Datasheet
TPS54521.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • 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.

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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.
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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.


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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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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.


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TPS54521RHLR Image

TPS54521RHLR

Texas Instruments
32D-TPS54521RHLR

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

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