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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Texas Instruments TPS546A24ARVFR

Name: TPS546A24ARVFR
Brand: Texas Instruments
SKU: TPS546A24ARVFR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS546A24ARVFR

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 40-PowerLFQFN

Datasheet:: TPS546A24ARVFR.pdf

Description:: IC REG BUCK ADJ 10A 40LQFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TPS546A24ARVFR from Texas Instruments is a 10-A, PMBus-enabled buck converter with integrated 5.5-mΩ/1.8-mΩ MOSFETs, operating from 2.95 V to 18 V input and delivering 0.25 V to 5.5 V output. It supports 2×–4× stacking for up to 40 A, features differential remote sensing (<1% VOUT error over –40°C to +150°C), and targets high-density server and FPGA core power rails.

For engineers reviewing the TPS546A24ARVFR datasheet, TPS546A24ARVFR pinout, TPS546A24ARVFR application, or TPS546A24ARVFR equivalent, key selection criteria include its stackable PMBus interface, selectable internal compensation, 12-frequency range (225 kHz–1.5 MHz), AVIN/PVIN split-rail support, and 7-mm × 5-mm LQFN-CLIP (RVF) package with thermal pad.

Technical Context

The TPS546A24ARVFR implements average current-mode control with input feedforward and user-selectable internal compensation components-enabling stable operation across wide output capacitance ranges without external loop tuning. Its proprietary fixed-frequency architecture supports prebiased startup and strongly coupled inductor operation.

Back-channel communication (BCX_CLK/BCX_DAT) enables synchronized multi-phase operation with single PMBus address per output rail. The device integrates dual LDOs (VDD5 and BP1V5), supports AVS/margining via PMBus, and provides telemetry for VOUT, IOUT, and die temperature with ±2% measurement accuracy.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.95 V to 18 V on both PVIN and AVIN rails-enables flexible split-rail supply design and reduces need for auxiliary bias rails.
Output Current	10 A continuous per device; up to 40 A with 2–4 stacked units sharing current via VSHARE-supports scalable high-current loads without redesign.
Output Voltage Range	0.25 V to 5.5 V programmable via PMBus VOUT_COMMAND or 0.5 V to 5.5 V via pin strap-covers ASIC/FPGA core, I/O, and auxiliary rail requirements.
Switching Frequency	225 kHz to 1.5 MHz in 12 discrete steps-allows optimization of size, efficiency, and EMI in space-constrained data center and telecom systems.
Remote Sensing Accuracy	<1% VOUT error from –40°C to +150°C TJ-ensures tight regulation at point-of-load under thermal stress without external compensation.
Thermal Resistance	RθJA = 25.3°C/W (JEDEC standard); RθJB = 8.5°C/W-validates effective heat transfer to PCB, critical for sustained 10-A operation in 7 mm × 5 mm footprint.
PMBus Interface	1-MHz clock support with full telemetry (VOUT, IOUT, die temp), AVS, margining, and fault response configuration-enables real-time system-level power management and diagnostics.

Pinout & Package

TPS546A24ARVFR uses a 40-pin LQFN-CLIP (RVF) package with 7.00 mm × 5.00 mm body size, 0.5 mm pitch, and exposed thermal pad internally connected to PGND. Thermal pad solder coverage is mandatory for thermal performance and reliability.

Pin/Terminal	Circuit Role	Design Meaning
PGD/RST_B	Open-drain power-good or RESET# signal	Configurable via PMBus register; default is power-good indicator-provides system sequencing feedback or reset assertion without external logic.
PMB_DATA / PMB_CLK	PMBus bidirectional data and clock	Supports 1-MHz operation; enables full digital configuration, telemetry, and fault logging-replaces analog trim pots and discrete monitoring circuits.
VOSNS / GOSNS/SLAVE	Differential remote sense inputs	VOSNS connects to load VOUT+; GOSNS pulled to BP1V5 for slave mode-enables <1% regulation accuracy and automatic master/slave identification in stacked configurations.
VSHARE	Current-sharing voltage bus	Used only in multi-phase stacks; floating in standalone use-ensures precise current balance across up to four devices without external DACs or op-amps.
SYNC	Frequency sync in/out	Configurable as SYNC IN or SYNC OUT via ADRSEL or PMBus-eliminates beat frequencies in multi-rail systems and simplifies EMI filtering.
BCX_CLK / BCX_DAT	Back-channel clock and data	Enables inter-device communication for synchronized switching and shared address-reduces firmware complexity when stacking multiple TPS546A24ARVFR units.
VDD5 / BP1V5	Integrated 5-V and 1.5-V LDO outputs	VDD5 powers gate drivers; BP1V5 powers digital logic-reduces external component count and improves PSRR vs. single-supply controllers.
EN/UVLO	Enable and analog UVLO input	Programmable turn-on/off thresholds (2.09 V–2.75 V); supports resistor-divider sequencing-enables robust power-up control without external supervisors.

Key Features

Feature	Design Value
Stackable Architecture	2×–4× stacking with back-channel synchronization and single PMBus address-reduces firmware overhead and simplifies system-level power management for >10-A rails.
Selectable Internal Compensation	Four transconductance (25–200 µS) and capacitor/resistor settings-enables stable loop response across diverse output capacitors without external RC networks.
Differential Remote Sensing	Internal FB divider with VOSNS/GOSNS inputs-achieves <1% output error over full temperature range, eliminating need for external precision resistors or amplifiers.
Split-Rail Input Support	Independent PVIN (power stage) and AVIN (controller) inputs-improves noise immunity and allows optimized bypassing for each domain, enhancing light-load efficiency.
Prebiased Output Startup	Supports powering loads with existing output voltage-prevents reverse current flow during hot-insertion or brownout recovery, protecting downstream FPGAs and ASICs.

Applications

Data Center Switches	Rack Servers
Use Scenario: High-density 1U/2U switch line cards requiring 12-V input conversion to 0.8-V/1.2-V FPGA core and 1.8-V I/O rails with dynamic load steps up to 10 A/µs. IC Role / Device Role / Timing Role: Primary PMBus-configurable buck regulator delivering tightly regulated core voltage with real-time telemetry and AVS for adaptive voltage scaling. Use Value: Enables closed-loop voltage optimization under varying workload, reducing power consumption by up to 15% versus fixed-voltage designs while maintaining <±1% regulation.	Use Scenario: Dual-socket server motherboards needing scalable 48-V or 12-V intermediate bus conversion to multiple low-voltage rails (0.8 V, 1.0 V, 1.8 V) for CPUs, memory, and accelerators. IC Role / Device Role / Timing Role: Stackable DC/DC controller supporting 2–4 parallel phases per rail-provides up to 40 A per output with synchronized switching and current sharing. Use Value: Eliminates need for discrete current-sharing ICs or complex phase-interleaving circuitry, reducing BOM count and layout area by >30% compared to discrete solutions.
Active Antenna Systems	Medical Imaging Equipment
Use Scenario: 5G massive MIMO radio units with distributed beamforming ICs requiring ultra-low-noise, fast-transient 3.3-V and 5-V supplies with remote sensing over 50-mm PCB traces. IC Role / Device Role / Timing Role: Point-of-load regulator with differential remote sensing and programmable soft-start-compensates for IR drop across long traces and prevents inrush-induced voltage droop. Use Value: Maintains <±5 mV regulation at load despite 150-mΩ trace resistance, ensuring consistent RF amplifier bias and minimizing EVM degradation.	Use Scenario: MRI gradient amplifier modules demanding high-reliability, low-EMI 12-V-to-5-V conversion for analog front-end ADCs and digital control logic in magnetically shielded enclosures. IC Role / Device Role / Timing Role: Isolated secondary-side buck converter with frequency sync and thermal warning-synchronizes switching to avoid interference with sensitive MRI timing signals. Use Value: Reduces conducted EMI by >15 dB through precise frequency alignment and eliminates thermal shutdown events during sustained 8-A loads via accurate die temperature telemetry.

Data Center Switches

Rack Servers

Use Scenario: High-density 1U/2U switch line cards requiring 12-V input conversion to 0.8-V/1.2-V FPGA core and 1.8-V I/O rails with dynamic load steps up to 10 A/µs.

IC Role / Device Role / Timing Role: Primary PMBus-configurable buck regulator delivering tightly regulated core voltage with real-time telemetry and AVS for adaptive voltage scaling.

Use Value: Enables closed-loop voltage optimization under varying workload, reducing power consumption by up to 15% versus fixed-voltage designs while maintaining <±1% regulation.

Use Scenario: Dual-socket server motherboards needing scalable 48-V or 12-V intermediate bus conversion to multiple low-voltage rails (0.8 V, 1.0 V, 1.8 V) for CPUs, memory, and accelerators.

IC Role / Device Role / Timing Role: Stackable DC/DC controller supporting 2–4 parallel phases per rail-provides up to 40 A per output with synchronized switching and current sharing.

Use Value: Eliminates need for discrete current-sharing ICs or complex phase-interleaving circuitry, reducing BOM count and layout area by >30% compared to discrete solutions.

Active Antenna Systems

Medical Imaging Equipment

Use Scenario: 5G massive MIMO radio units with distributed beamforming ICs requiring ultra-low-noise, fast-transient 3.3-V and 5-V supplies with remote sensing over 50-mm PCB traces.

IC Role / Device Role / Timing Role: Point-of-load regulator with differential remote sensing and programmable soft-start-compensates for IR drop across long traces and prevents inrush-induced voltage droop.

Use Value: Maintains <±5 mV regulation at load despite 150-mΩ trace resistance, ensuring consistent RF amplifier bias and minimizing EVM degradation.

Use Scenario: MRI gradient amplifier modules demanding high-reliability, low-EMI 12-V-to-5-V conversion for analog front-end ADCs and digital control logic in magnetically shielded enclosures.

IC Role / Device Role / Timing Role: Isolated secondary-side buck converter with frequency sync and thermal warning-synchronizes switching to avoid interference with sensitive MRI timing signals.

Use Value: Reduces conducted EMI by >15 dB through precise frequency alignment and eliminates thermal shutdown events during sustained 8-A loads via accurate die temperature telemetry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS546D24ARVFR	Same 40-pin RVF package and PMBus interface, but rated for 15-A continuous output and higher R_DS(on) (4.2 mΩ/1.5 mΩ).	Targeted at higher-current rails where 10-A headroom is insufficient; supports identical stacking and telemetry features.	Select TPS546D24ARVFR when peak load exceeds 12 A or when lower R_DS(on) on low-side FET improves light-load efficiency.
ISL9123IRAJZ-T7A	3-A, 2.5-V–5.5-V input, 0.3-V–1.95-V output; no PMBus, no stacking, smaller 2.5-mm × 2.5-mm WLCSP.	Designed for portable SoC core rails-not suitable for server or industrial applications requiring >5 A or digital telemetry.	Choose ISL9123IRAJZ-T7A only for space-constrained battery-powered devices where 10-A capability and PMBus are unnecessary.

Compared with TPS546D24ARVFR, the TPS546A24ARVFR offers tighter thermal design margin at 10-A loads and lower gate drive losses due to optimized MOSFET sizing; versus ISL9123IRAJZ-T7A, it delivers 3.3× higher current, full digital control, and enterprise-grade telemetry-making it unsuitable as a drop-in replacement outside low-power mobile contexts.

Availability

TPS546A24ARVFR is available at Aetrix Electronics and suitable for data center switches, rack servers, and active antenna systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for high-reliability deployments.

Supply support for TPS546A24ARVFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in high-performance power conversion.

The TPS546A24ARVFR belongs to TI's high-density PMBus buck converter product line, engineered specifically for next-generation computing infrastructure where scalability, telemetry, and thermal efficiency are critical for AI accelerators, 5G baseband units, and medical imaging subsystems.

FAQ

What is the maximum output current achievable with a single TPS546A24ARVFR device?

A single TPS546A24ARVFR delivers 10 A continuous output current under recommended operating conditions (T_J ≤ 150°C, proper PCB thermal design). Its integrated 5.5-mΩ high-side and 1.8-mΩ low-side MOSFETs enable this rating with minimal external components. The device also supports stacking up to four units for 40-A total output while maintaining current sharing and single-address PMBus control-making TPS546A24ARVFR ideal for scalable high-current applications like server CPU cores.

Does the TPS546A24ARVFR support remote voltage sensing, and what is its accuracy?

Yes, the TPS546A24ARVFR supports differential remote sensing via VOSNS and GOSNS/SLAVE pins, achieving <1% output voltage error across –40°C to +150°C junction temperature. This accuracy is maintained without external compensation components thanks to its internal feedback divider and precision amplifier. The remote sense function is essential for point-of-load regulation in systems with long PCB traces or high-current paths-ensuring stable operation for sensitive loads like FPGAs and ASICs powered by TPS546A24ARVFR.

Can the TPS546A24ARVFR be synchronized to an external clock, and how is this configured?

Yes, the TPS546A24ARVFR supports frequency synchronization via its SYNC pin, configurable as either SYNC IN or SYNC OUT using the ADRSEL pin or the MFR_SPECIFIC_20 PMBus command. When used as SYNC IN, it locks switching frequency to an external clock source between 225 kHz and 1.5 MHz with ±20% tolerance; as SYNC OUT, it drives other converters to eliminate beat frequencies. This capability is critical for EMI reduction in multi-rail systems-ensuring clean spectral profiles when multiple TPS546A24ARVFR units operate in proximity.

What are the supported output voltage programming methods for the TPS546A24ARVFR?

The TPS546A24ARVFR supports two primary output voltage programming methods: pin-strapping (0.5 V to 5.5 V) using VSEL resistor dividers, and digital PMBus control (0.25 V to 5.5 V) via VOUT_COMMAND. Pin-strapping enables "program-free" power-up for fixed-voltage rails, while PMBus allows dynamic adjustment, margining, and AVS during operation. Both methods retain the same <1% regulation accuracy-giving designers flexibility to choose between simplicity (pin-strap) or runtime adaptability (PMBus) depending on system requirements for TPS546A24ARVFR deployment.

How does the TPS546A24ARVFR handle overtemperature conditions, and what protection features are included?

The TPS546A24ARVFR integrates bandgap-based thermal sensing with programmable overtemperature fault (default 150°C) and warning (default 125°C) thresholds, plus 25°C hysteresis. Upon reaching the fault limit, it latches off; warning triggers telemetry via PMBus without shutdown. Additional protections include adjustable overvoltage/undervoltage fault (VOVF/VUVF), current limiting (4–23 A range), and input UVLO with hysteresis. These coordinated safeguards ensure robust operation in thermally demanding environments-such as enclosed rack servers-where TPS546A24ARVFR maintains reliability without external supervision circuits.

TPS546A24ARVFR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 40-PowerLFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.95V

Voltage - Input (Max):: 18V

Voltage - Output (Min/Fixed):: 0.5V

Voltage - Output (Max):: 5.5V

Current - Output:: 10A

Frequency - Switching:: 255kHz ~ 1.5MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 40-LQFN-CLIP (7x5)

TPS546A24ARVFR FAQ

1.How can I place an order for TPS546A24ARVFR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS546A24ARVFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS546A24ARVFR reliable?

The price and inventory of TPS546A24ARVFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS546A24ARVFR is usually 5 days.

3.What payment methods are accepted for TPS546A24ARVFR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS546A24ARVFR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS546A24ARVFR?

TPS546A24ARVFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS546A24ARVFR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS546A24ARVFR?

For technical support, including TPS546A24ARVFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS546A24ARVFR requirements.

6.How does Aetrix verify that TPS546A24ARVFR is sourced from the original manufacturer or authorized distributors?

All TPS546A24ARVFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS546A24ARVFR meets industry standards.

7.What is the process for return or replacement of TPS546A24ARVFR?

All TPS546A24ARVFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS546A24ARVFR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS546A24ARVFR part is unused and in its original packaging.

Return procedure for TPS546A24ARVFR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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