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Texas Instruments TPS546C23ZRVFR
- Part No.:
- TPS546C23ZRVFR
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS546C23ZRVFR.pdf
- Description:
- IC REG BUCK ADJ 35A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,597
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Product details
Overview
TPS546C23ZRVFR from Texas Instruments is a PMBus 1.3–compliant, 35-A synchronous buck converter with integrated NexFET™ power stage, supporting 4.5 V to 18 V input and 0.35 V to 5.5 V output. It delivers high-density power conversion in a 7-mm × 5-mm LQFN-40 package, features lossless current sensing, differential remote sensing, and monotonic start-up into pre-biased loads-ideal for server VR13/VR14 CPU core rails.
For engineers reviewing the TPS546C23ZRVFR datasheet, TPS546C23ZRVFR pinout, TPS546C23ZRVFR application, or TPS546C23ZRVFR equivalent, key selection criteria include its stackable 2× configuration (70 A), PMBus telemetry (VOUT/VIN/IOUT/die temp), adaptive voltage scaling via VOUT_COMMAND, ±0.5% reference accuracy at ≥600 mV, and programmable OCP/UVLO/fault responses.
Technical Context
The TPS546C23ZRVFR implements voltage-mode control with input feed-forward, enabling stable regulation across wide VIN ranges. Its dual-regulator architecture supplies 3.3 V (BP3) for controller logic and 6.5 V (BP6) for gate drivers, both internally regulated and bypassed to dedicated ground domains (AGND/PGND).
Current sharing between stacked devices is achieved via ISHARE and VSHARE pins with ±15% accuracy above 20 A per device; synchronization supports interleaved 2-phase operation using SYNC-IN/SYNC-OUT with 50% duty cycle and <1 µs timing skew. The device reports real-time telemetry-including output current (±15% acc), voltage (±2%), and die temperature (±5°C)-via PMBus 1.3 commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports 5 V, 12 V, and 18 V intermediate bus architectures without external regulators. |
| Output Current | 35 A continuous - enables single-chip CPU/GPU core rail solutions; two devices stack to 70 A with current sharing. |
| Output Voltage Range | 0.35 V to 5.5 V - covers VR13/VR14 core, SoC I/O, and memory supply requirements with AVS margining. |
| Reference Accuracy | ±0.5% at ≥600 mV - ensures tight regulation for low-voltage, high-current digital loads. |
| Switching Frequency | 200 kHz to 1 MHz - adjustable via RT resistor or external SYNC clock for EMI optimization and layout flexibility. |
| PMBus Compliance | PMBus 1.3 - enables full telemetry (VOUT, IOUT, die temp), programmable fault thresholds (OCP/OT/UV/OV), and AVS via VOUT_COMMAND. |
| Power Stage RDS(on) | 3.2 mΩ (HS) / 1.4 mΩ (LS) at 25°C - low conduction loss enables >90% efficiency at 12 V IN / 1 V OUT / 30 A. |
Pinout & Package
TPS546C23ZRVFR uses a 40-pin LQFN (RVF) package with 7.0 mm × 5.0 mm body size and exposed thermal pad connected to PGND. Pin functions are validated per TI SLUSCC7C Rev C datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RT | Frequency setting input | Connects to AGND via resistor to set switching frequency from 200 kHz to 1 MHz; floating not allowed. |
| ADDR0 / ADDR1 | PMBus address configuration | Resistor-to-AGND sets 6-bit PMBus address (64 options); enables multi-device bus addressing without conflict. |
| ISHARE / VSHARE | 2-phase current/voltage sharing interface | Enables precise load balancing between stacked converters; floating in single-device mode. |
| DIFFO / RSP / RSN | Differential remote sense outputs/inputs | Supports Kelvin sensing at load; DIFFO feeds error amplifier for accurate regulation under PCB IR drop. |
| SYNC | Frequency synchronization I/O | Configures as SYNC-IN (master/slave) or SYNC-OUT (master only); enables interleaving with <1 µs phase skew. |
| RESET/PGD | Power-good indicator or reset input | Open-drain output (PGD) or active-low input (RESET); function selected via MFR_SPECIFIC_21 register bit EN_RESET_B. |
| BP3 / BP6 | Onboard regulator outputs | BP3 = 3.3 V for controller logic; BP6 = 6.5 V for gate drivers; each requires local 2.2 µF + 100 nF bypass to respective ground. |
| PGND / DRGND / AGND | Ground domains | PGND = power-stage return (thermal pad); DRGND = driver ground; AGND = analog controller ground - must be tied at thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| Stackable 2× architecture | Two TPS546C23ZRVFR devices deliver up to 70 A with ±15% current-sharing accuracy above 20 A per device. |
| Lossless low-side current sensing | Eliminates sense resistor power loss and board area; enables accurate real-time IOUT reporting (±15% acc) via PMBus. |
| Differential remote sensing | Compensates for PCB trace resistance up to 20 mΩ; maintains ±0.5% output regulation at point-of-load. |
| Adaptive Voltage Scaling (AVS) | VOUT_COMMAND register adjusts output voltage dynamically (0.35–5.5 V) with 2⁻⁹ V resolution for performance/power trade-offs. |
| Programmable telemetry & protection | OCP, UVLO, OV/UV fault thresholds, soft-start/stop times, and thermal limits configured via PMBus-not hardwired. |
| Monotonic start-up into pre-biased output | Prevents reverse current flow during hot-insertion or system sequencing; critical for multi-rail server platforms. |
Applications
| Server CPU Core Rail | Enterprise SSD Power |
|---|---|
Use Scenario: Delivering tightly regulated 0.8–1.2 V at up to 70 A to modern x86 CPU cores with dynamic AVS demands. IC Role / Device Role / Timing Role: Primary VR13/VR14 buck controller providing core voltage, telemetry, and fast transient response. Use Value: ±0.5% reference accuracy and differential sensing maintain sub-10 mV regulation window under 50 A/µs load steps. |
Use Scenario: Powering NVMe SSD controllers and NAND flash arrays requiring clean, sequenced 1.8 V, 3.3 V, and 12 V rails. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping 12 V down to 1.8 V/3.3 V with PMBus-configurable sequencing. Use Value: Programmable soft-start/stop and monotonic start-up prevent data corruption during hot-plug and power-cycle events. |
| Ethernet Switch ASIC Supply | Test & Instrumentation Load |
Use Scenario: Supplying 0.95 V @ 40 A to high-speed switch ASICs with strict ripple (<10 mVpp) and transient response requirements. IC Role / Device Role / Timing Role: Synchronous buck regulator with voltage-mode control and input feed-forward for wide-VIN stability. Use Value: 200 kHz–1 MHz frequency tuning allows EMI spread-spectrum alignment and optimal inductor sizing for compact 1U chassis. |
Use Scenario: Programmable DC source in automated test equipment requiring precise voltage/current control and real-time monitoring. IC Role / Device Role / Timing Role: Telemetry-enabled power stage delivering calibrated output with PMBus-read VOUT/IOUT/temperature. Use Value: ±2% VOUT and ±15% IOUT measurement accuracy enable closed-loop calibration without external sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, PMBus-enabled buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2960GQ-Z | 40-A peak rating, 4.5–18 V input, but lacks differential remote sensing and has ±1% VREF accuracy vs. ±0.5%. | Targeted at GPU/ASIC rails where telemetry depth is secondary to cost; no AVS support via VOUT_COMMAND. | Choose MP2960GQ-Z when budget constraints outweigh need for precision AVS and remote sensing. |
| ISL91302BHRZ-T | 30-A dual-phase controller with integrated drivers, but no onboard BP3/BP6 regulators-requires external bias supplies. | Designed for mobile SoC power delivery (e.g., APUs); lacks PMBus 1.3 compliance and telemetry reporting capability. | Choose ISL91302BHRZ-T for space-constrained portable designs where PMBus telemetry is unnecessary. |
Compared with MP2960GQ-Z and ISL91302BHRZ-T, the TPS546C23ZRVFR uniquely combines 35-A continuous output, ±0.5% reference accuracy, differential remote sensing, and full PMBus 1.3 telemetry in a single 7×5 mm package-making it optimal for server, storage, and infrastructure applications demanding precision, scalability, and observability.
Availability
TPS546C23ZRVFR is available at Aetrix Electronics and suitable for server CPU core rails, enterprise SSD power systems, Ethernet switch ASIC supplies, and test instrumentation loads requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS546C23ZRVFR 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 and embedded processing technologies, with decades of power management innovation.
The TPS546C23ZRVFR belongs to TI's high-current, PMBus-compliant DC/DC converter product line, designed specifically for next-generation server, storage, and networking infrastructure requiring scalable, observable, and adaptive power delivery.
FAQ
What is the maximum output current capability of the TPS546C23ZRVFR?
The TPS546C23ZRVFR delivers 35 A continuously in a single-device configuration. When two TPS546C23ZRVFR units are stacked in parallel with proper ISHARE/VSHARE interconnection, the system supports up to 70 A with ±15% current-sharing accuracy above 20 A per device. This scalability is enabled by TI's proprietary current-sharing algorithm and verified in the TPS546C23ZRVFR datasheet Section 7.3.
Does the TPS546C23ZRVFR support adaptive voltage scaling (AVS)?
Yes, the TPS546C23ZRVFR supports AVS through the PMBus VOUT_COMMAND register, allowing dynamic adjustment of output voltage from 0.35 V to 5.5 V in 2⁻⁹ V steps. This feature enables real-time performance/power optimization for CPUs and ASICs, with factory-default settings configurable via PMBus write commands per Section 7.5 of the TPS546C23ZRVFR datasheet.
What are the required bypass capacitors for BP3 and BP6 on the TPS546C23ZRVFR?
The TPS546C23ZRVFR requires a minimum 2.2 µF ceramic capacitor from BP3 to AGND and a minimum 2.2 µF + 100 nF ceramic capacitor from BP6 to PGND. The 100 nF capacitor reduces high-frequency ripple on the 6.5-V gate driver supply. These values are specified in the Pin Functions table (Section 5) of the TPS546C23ZRVFR datasheet and are critical for stable operation.
Can the TPS546C23ZRVFR operate with a pre-biased output?
Yes, the TPS546C23ZRVFR supports monotonic start-up into pre-biased outputs-a requirement for hot-plug and multi-rail sequencing in servers and switches. This behavior is inherent to its control architecture and does not require external circuitry. The feature is documented in Section 3 (Description) and Section 7.3 (Feature Description) of the TPS546C23ZRVFR datasheet.
How is the switching frequency programmed on the TPS546C23ZRVFR?
The TPS546C23ZRVFR switching frequency is programmed either by connecting a resistor from the RT pin to AGND (200 kHz to 1 MHz range) or by applying an external clock to the SYNC pin. The RT resistor value determines nominal frequency (e.g., 40.2 kΩ yields 500 kHz), while SYNC supports synchronization to external clocks from 160 kHz to 1.2 MHz with ±20% tolerance, as detailed in Section 6.5 of the TPS546C23ZRVFR datasheet.
TPS546C23ZRVFR 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):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.35V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 35A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN-CLIP (7x5)
TPS546C23ZRVFR FAQ
1.How can I place an order for TPS546C23ZRVFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS546C23ZRVFR 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 TPS546C23ZRVFR reliable?
The price and inventory of TPS546C23ZRVFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS546C23ZRVFR is usually 5 days.
3.What payment methods are accepted for TPS546C23ZRVFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS546C23ZRVFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS546C23ZRVFR?
TPS546C23ZRVFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS546C23ZRVFR 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 TPS546C23ZRVFR?
For technical support, including TPS546C23ZRVFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS546C23ZRVFR requirements.
6.How does Aetrix verify that TPS546C23ZRVFR is sourced from the original manufacturer or authorized distributors?
All TPS546C23ZRVFR 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 TPS546C23ZRVFR meets industry standards.
7.What is the process for return or replacement of TPS546C23ZRVFR?
All TPS546C23ZRVFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS546C23ZRVFR, 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 TPS546C23ZRVFR part is unused and in its original packaging.
Return procedure for TPS546C23ZRVFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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