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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage Regulators - DC DC Switching RegulatorsTPS54917RUVT
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TPS54917RUVT - Texas Instruments

Manufacturer Part Number
TPS54917RUVT
Manufacturer
Texas Instruments
Allelco Part Number
32D-TPS54917RUVT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
8,374 pcs available, New & Original
Parts Description
IC REG BUCK ADJUSTABLE 9A 34VQFN
Package
34-VQFN (7x3.5)
Data sheet
TPS54917RUVT.pdf

HTML Datasheet

TPS54917.pdf
RoHs Status
ROHS3 Compliant
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Specifications

TPS54917RUVT Tech Specifications
Texas Instruments - TPS54917RUVT technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TPS54917RUVT

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 0.891V
Voltage - Output (Max) 3.6V
Voltage - Input (Min) 3V
Voltage - Input (Max) 4V
Topology Buck
Synchronous Rectifier Yes
Supplier Device Package 34-VQFN (7x3.5)
Series SWIFT™
Package / Case 34-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 350kHz, 550kHz
Current - Output 9A
Base Product Number TPS54917

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

TPS54917RUVT Image
TPS54917RUVT (1)

Manufacturer Part Number

TPS54917RUVT

Manufacturer

Texas Instruments

Introduction

High-performance, synchronous, step-down DC/DC converter

Optimized for high-current, high-efficiency power conversion

Product Features and Performance

Wide input voltage range: 3V to 4V

Adjustable output voltage from 0.891V to 3.6V

Up to 9A output current capability

High efficiency: up to 95%

Switching frequency options: 350kHz and 550kHz

Integrated power MOSFETs

Protection features: overcurrent, overvoltage, undervoltage, thermal shutdown

Product Advantages

Compact design with high power density

Excellent transient response and load regulation

Flexible configuration options

Robust protection features for reliable operation

Key Technical Parameters

Input voltage range: 3V to 4V

Output voltage range: 0.891V to 3.6V

Output current: up to 9A

Switching frequency: 350kHz or 550kHz

Operating temperature range: -40°C to 125°C

Quality and Safety Features

RoHS3 compliant

Robust thermal management design

Overcurrent, overvoltage, and undervoltage protection

Compatibility

Suitable for a wide range of applications that require high-efficiency, high-current power conversion

Application Areas

Portable electronics

Industrial equipment

Networking and telecommunication equipment

Automotive electronics

Product Lifecycle

Currently in production

Replacement or upgrade options available from Texas Instruments

Key Reasons to Choose This Product

High-efficiency power conversion with up to 95% efficiency

Flexible configuration options to match various application requirements

Robust protection features for reliable operation

Compact design with high power density

Excellent transient response and load regulation

Wide operating temperature range of -40°C to 125°C

Frequently Asked Questions(FAQ)

How does the TPS54917RUVT compare to other synchronous buck regulators in terms of efficiency and thermal performance under continuous 9A load conditions?
The TPS54917RUVT achieves peak efficiency exceeding 92% at 3.3V input and 1.8V output with a 9A load, primarily due to its integrated high-side MOSFET with 15mΩ typical Rds(on) and low gate charge characteristics. At full load, junction temperature rises approximately 40°C above ambient when mounted on a 4-layer PCB with 2oz copper and adequate thermal vias. This thermal behavior is superior to non-synchronous alternatives but slightly inferior to newer GaN-based solutions; however, it remains competitive among 3-4V input buck converters with similar current ratings due to its 350/550kHz switching frequency flexibility and SWIFT™ architecture optimizations.
What are the key design considerations when selecting output capacitors for the TPS54917RUVT to ensure stable operation across -40°C to 125°C?
Output capacitor selection must account for the TPS54917RUVT’s internal compensation network and ESR requirements. For ceramic capacitors (X7R or X8R), total effective capacitance should remain above 15μF including DC bias derating. Low-ESR polymer capacitors are preferred over tantalum to avoid instability from negative impedance. The minimum recommended value is 10μF per TI guidelines, but in practice, 22μF or higher is used in industrial applications to maintain phase margin under cold-start conditions. Ceramic types with sufficient voltage rating (≥6.3V) and stable capacitance vs. temperature profile are essential.
Can the TPS54917RUVT operate reliably in automotive environments requiring AEC-Q100 qualification?
No, the TPS54917RUVT is not AEC-Q100 qualified. While it supports an operating junction temperature range of -40°C to +125°C (TJ), which overlaps with some automotive temperature grades, it lacks the full suite of reliability testing and documentation required by automotive standards. Substitutes like the TPS62871QWRXSRQ1 offer Q100-grade variants, making them more suitable for production automotive designs where component qualification is mandated.
Why might someone choose the TPS54917RUVT over the base model TPS54917 without the "RUV" suffix?
The "RUV" designation specifies a specific reel packaging variant compliant with standard industry tape-and-reel formats compatible with pick-and-place equipment using 7" reels. The base TPS54917 may be available in different package forms or evaluation modules, whereas the RUV variant is optimized for high-volume manufacturing automation. Additionally, the RUV version includes full compliance with RoHS3, REACH unaffected status, and standardized marking, ensuring supply chain consistency across global distributors.
How does the adjustable output voltage range of the TPS54917RUVT impact system design flexibility compared to fixed-output regulators?
With an output adjustable from 0.891V to 3.6V using a simple resistor divider, the TPS54917RUVT allows precise tuning of downstream logic voltages without redesigning the power stage. This is particularly valuable in FPGA or microprocessor applications where multiple rails are needed from a single converter. In contrast, fixed-output regulators require separate components or post-regulation stages, increasing board space and BOM count. However, adjustable designs demand careful layout to minimize noise coupling into feedback traces, especially given the IC’s 350–550kHz switching edges.
What happens if the input voltage to the TPS54917RUVT exceeds 4V during transient events such as load dump or hot-plug insertion?
The device includes built-in overvoltage protection (OVP) that disables the high-side MOSFET when VIN exceeds approximately 4.5V, preventing damage to internal circuitry. During transients beyond 34V, external TVS diodes or clamping circuits must be added since the absolute maximum rating is 34V. The OVP threshold ensures safe operation up to 4V nominal, but robust input filtering—such as bulk capacitors and ferrite beads—is recommended to suppress ringing and overshoot in harsh environments.
Is it possible to parallel multiple TPS54917RUVT units to increase current capacity, and what precautions are necessary?
Direct paralleling of TPS54917RUVT devices is not supported due to lack of current sharing mechanisms. Attempting this can result in uneven current distribution, leading to thermal runaway or premature failure. Instead, consider using a single higher-current regulator or designing a master-slave configuration with external current balancing resistors and synchronization pins if available. For applications requiring >9A, TI recommends evaluating the TPS562200 or similar higher-density PMICs instead.
How does the switching frequency selection between 350kHz and 550kHz affect EMI and component size in a compact PCB design using the TPS54917RUVT?
Selecting 550kHz reduces inductor and output capacitor size compared to 350kHz, beneficial for space-constrained designs. However, higher frequencies generate more conducted EMI near the upper end of CISPR 25 Class 5 limits, necessitating careful layout, shielding, and filtering. In contrast, 350kHz offers better electromagnetic compatibility at the expense of larger passive components. Most industrial designs favor 350kHz unless size is critical, as it simplifies filter design and improves transient response stability.
What is the significance of the Moisture Sensitivity Level (MSL) rating of 3 for the TPS54917RUVT in surface-mount assembly processes?
MSL 3 indicates the TPS54917RUVT can withstand up to 168 hours at 30°C/60% RH before baking is required after moisture exposure. This aligns with standard reflow soldering profiles used in lead-free assembly. Manufacturers must follow IPC/JEDEC J-STD-020 guidelines for handling, storage, and pre-bake procedures. Failure to comply risks popcorning during reflow, leading to delamination and potential electrical failure, especially in sealed or humid-environment applications.
How does the TPS54917RUVT handle startup inrush current when driving capacitive loads greater than 100μF?
The device features soft-start control that limits ramp-up time to 1ms typical, reducing inrush current to below 1.5× rated output current. For loads exceeding 100μF, this mitigates stress on input capacitors and upstream supplies. Nevertheless, very large output banks may still draw transient surges during initial connection; adding a series resistor (e.g., 10Ω) or using active pre-charge circuits is advisable in sensitive systems like server PSUs or battery-backed configurations.
Are there any known limitations when using the TPS54917RUVT with digital voltage positioning or droop control techniques?
Yes, the TPS54917RUVT does not support native digital voltage positioning. Implementing droop externally requires additional sense resistors and analog control loops that may interact unpredictably with the internal feedback loop. This can degrade transient response or introduce instability. For digital sequencing or adaptive voltage scaling, consider TI’s Fusion Digital Power™ controllers like the TPSM84823, which integrate programmable droop and telemetry directly.
What role does the exposed pad play in thermal management of the TPS54917RUVT during high ambient temperature operation?
The 34-VQFN exposed pad provides direct thermal conduction to the PCB ground plane, reducing thermal resistance by up to 30% compared to non-exposed packages. Proper soldering and via stitching under the pad are essential to dissipate heat from the die to surrounding copper layers. Without adequate thermal relief, junction temperatures can exceed 125°C even at moderate loads in 85°C ambient environments, triggering thermal shutdown or long-term reliability degradation.
How do substitutes like the TPS62871QWRXSRQ1 improve upon the TPS54917RUVT in terms of efficiency and integration?
The TPS62871QWRXSRQ1 integrates a higher-efficiency GaN-like architecture with lower Rds(on) switches and operates at 2.25MHz, enabling significantly smaller magnetics. It delivers >95% efficiency at light loads and supports ultra-low quiescent current (as low as 18µA), making it ideal for always-on systems. In comparison, the TPS54917RUVT trades off size for robustness and simplicity, but lacks such fine-grained optimization for portable or energy-harvesting applications.
What precautions should be taken when routing feedback traces near switching nodes on boards using the TPS54917RUVT?
Feedback traces must be routed away from the SW node, input capacitors, and inductor to avoid picking up high-frequency noise that could destabilize regulation. Keep them short, shielded if possible, and use Kelvin connections to minimize parasitic inductance. Ground return paths should mirror signal paths to reduce loop area. Poor routing has led to audible oscillations or output ripple spikes exceeding 50mVpp in prototype layouts, despite otherwise correct external components.
Does the TPS54917RUVT provide cycle-by-cycle current limiting, and how accurate is it under varying temperature conditions?
Yes, the device implements true cycle-by-cycle current limit using internal sensing of high-side switch current. The typical limit is set to 10.5A with ±15% tolerance over the full -40°C to 125°C range. Accuracy degrades slightly at extreme temperatures due to semiconductor parameter drift, but remains well within safe operating limits for most industrial and telecom applications. Overload protection triggers within one switching cycle, effectively protecting both the IC and downstream loads.
What are the implications of choosing the TPS54917RUVT in a system requiring strict radiated emissions compliance per FCC Part 15 or EN 55032?
Radiated emissions from the SW node and associated parasitics dominate near-field radiation sources. The TPS54917RUVT’s moderate switching frequency (350/550kHz) places harmonics outside broadcast bands, simplifying mitigation. Still, proper layout—including minimized loop areas, snubber networks, and filtered inputs—is critical. Pre-compliance testing shows clean results only with optimized PCBs; unshielded layouts often fail at 30–200MHz without external filtering.
How does the base product number TPS54917 relate to the specific variant TPS54917RUVT in terms of functional equivalence?
All variants derived from the TPS54917 base share identical electrical characteristics, pinout, and performance specifications. The RUV suffix denotes only packaging format (tape-and-reel, 7" reel, cut tape), RoHS compliance level, and marking style. Functionally, they are indistinguishable in circuit behavior, enabling interchangeability in design files and BOMs as long as assembly house requirements are met. This abstraction supports streamlined inventory management across global supply chains.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TPS54917RUVT

Product Attribute TPS54917RUVR TPS54910PWPR TPS54973PWPR TPS54910PWPRG4
Part Number TPS54917RUVR TPS54910PWPR TPS54973PWPR TPS54910PWPRG4
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Voltage - Input (Max) - - - -
Voltage - Output (Max) - - - -
Synchronous Rectifier - - - -
Topology - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Number of Outputs - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Input (Min) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Output (Min/Fixed) - - - -
Frequency - Switching - - - -
Series - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Current - Output - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Output Configuration - - - -
Function - - - -

TPS54917RUVT Datasheet PDF

Download TPS54917RUVT pdf datasheets and Texas Instruments documentation for TPS54917RUVT - Texas Instruments.

HTML Datasheet
TPS54917.pdf

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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.

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TPS54917RUVT Image

TPS54917RUVT

Texas Instruments
32D-TPS54917RUVT

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