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Texas Instruments TPS543C20ARVFR
- Part No.:
- TPS543C20ARVFR
- Manufacturer:
- Texas Instruments
- Package:
- 40-PowerLFQFN
- Datasheet:
-
TPS543C20ARVFR.pdf
- Description:
- IC REG BUCK ADJ 40A 40LQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,783
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Product details
Overview
TPS543C20ARVFR from Texas Instruments is a 40-A, 4-V to 16-V input synchronous step-down DC/DC converter with integrated NexFET™ power stage (3.4 mΩ HS / 0.9 mΩ LS), adaptive internal compensation, and stackable architecture for up to 80-A POL delivery in enterprise server and ASIC core rails.
For engineers reviewing the TPS543C20ARVFR datasheet, TPS543C20ARVFR pinout, TPS543C20ARVFR application, or TPS543C20ARVFR equivalent, key selection considerations include its 0.6–5.5 V programmable output, 300 kHz–2 MHz switching frequency (pin-strapped), differential remote sensing, and 40-pin LQFN-CLIP (5 mm × 7 mm) thermal-pad package with PGND-connected exposed pad.
Technical Context
The TPS543C20ARVFR implements emulated peak-current-mode control with an internally generated ramp signal-adjustable via RAMP pin-to enable stable operation across wide output capacitor ESR ranges without external compensation. Its ACM controller integrates anti-cross-conduction logic, prebias-safe startup, and asynchronous pulse injection (API) for undershoot suppression.
It supports dual-phase stacking via ISHARE/VSHARE pins for precise current and voltage sharing, with synchronization capability (SYNC pin) and MODE-selectable API/body braking. The device uses lossless low-side current sensing and features high-accuracy hiccup overcurrent protection (±10% tolerance at 35 A with 33.2 kΩ ILIM resistor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 16 V - supports 5 V, 12 V, and 14 V intermediate bus architectures without external regulators. |
| Output Current | 40 A continuous - delivered from single 5-mm × 7-mm LQFN-CLIP package with integrated 3.4/0.9-mΩ NexFET™ power stage. |
| Output Voltage Range | 0.6 V to 5.5 V - set via VSEL pin strap (0.6–1.1 V reference) and feedback resistors; supports ASIC/FPGA core and I/O rails. |
| Switching Frequency | 300 kHz to 2 MHz - pin-strapped via RT resistor; limited to ≤1 MHz in stacked configurations for phase alignment. |
| Current Limit Accuracy | ±10% at 35 A - achieved with 33.2 kΩ resistor on ILIM pin; enables repeatable short-circuit protection across temperature. |
| Thermal Resistance | RθJC(bot) = 1 °C/W - low junction-to-case (bottom) resistance enabled by PGND-connected thermal pad for high-power dissipation. |
| Remote Sensing | Differential RSP/RSN inputs - provides ±1 mV offset accuracy and 5–8.5 MHz unity-gain bandwidth for millivolt-level load regulation. |
Pinout & Package
TPS543C20ARVFR is housed in a 40-pin LQFN-CLIP (RVF) package measuring 5.00 mm × 7.00 mm with 0.5-mm pitch and a single exposed thermal pad internally connected to PGND. The package supports high-current PCB layout with multiple SW, PVIN, PGND, and GND terminals for low-inductance power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSP / RSN | Differential remote sense inputs | Enable millivolt-accurate load regulation by sensing voltage at point-of-load; not required in slave devices during stacking. |
| SW | Power switch node | Connects directly to output inductor; shared across pins 8–12 for low-inductance, high-current routing. |
| PGND | Power ground return | Multiple pins (13–20) tied to thermal pad - forms low-impedance return path for low-side FET and minimizes ground bounce. |
| PVIN | Power-stage input supply | High-current input (pins 21–25); requires local 10–100 nF bypass to PGND to suppress MOSFET voltage stress. |
| VDD | Controller bias supply | 4–16 V input powering internal logic; internally regulated from BP; must be bypassed near IC. |
| ILIM | Overcurrent threshold setting | Resistor to AGND sets hiccup current limit (e.g., 33.2 kΩ → 35 A); enables accurate, temperature-stable fault protection. |
| ISHARE / VSHARE | Multi-phase current/voltage share signals | Enable precise load balancing between stacked converters; float in single-phase operation. |
| SYNC | Frequency synchronization I/O | Configurable as sync-in or sync-out (via MODE/RT) to align switching edges across phases and reduce EMI peaks. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated ACM control | Eliminates external compensation network; supports stable operation with MLCC-only output filters across 300 kHz–2 MHz. |
| Stackable 2× architecture | Enables 80-A output with matched current sharing (±15% error ≥20 A/phase) and synchronized CLK without master/slave configuration overhead. |
| Prebias-safe startup | Prevents reverse current flow into precharged outputs by delaying SW pulses until soft-start voltage exceeds sensed VOUT. |
| Asynchronous Pulse Injection (API) | Reduces output undershoot during fast load steps by injecting controlled high-side pulses independent of PWM timing. |
| Differential remote sensing | Compensates for IR drop in PCB traces; maintains ±0.5% output accuracy at load with 1.7 V common-mode input range. |
Applications
| Enterprise Server Core Rails | ASIC/FPGA I/O Power |
|---|---|
Use Scenario: Delivering tightly regulated 0.85 V @ 40 A to CPU/GPU cores in dual-socket servers with strict transient response requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator with differential remote sensing and API-enhanced transient recovery. Use Value: Achieves <15 mV undershoot under 20-A/µs load step due to body braking and API, maintaining SoC functional integrity. |
Use Scenario: Powering 1.2 V/30 A I/O banks in high-end FPGAs where rail monotonicity and sequencing margin are critical. IC Role / Device Role / Timing Role: Standalone POL converter with programmable soft-start (0.5–32 ms) and prebias-safe startup. Use Value: Enables reliable hot-plug operation into prebiased backplane rails without damaging FPGA I/O cells. |
| Wireless Baseband Processing | Enterprise SSD Controller Rails |
Use Scenario: Supplying 1.0 V @ 25 A to multi-core baseband processors in 5G macro radios with stringent EMI limits. IC Role / Device Role / Timing Role: Synchronized dual-phase converter (stacked TPS543C20ARVFR pair) operating at 1 MHz. Use Value: Reduces fundamental switching noise amplitude by 6 dB through phase interleaving while maintaining <1% current imbalance. |
Use Scenario: Generating 3.3 V @ 15 A for NVMe SSD controllers requiring low-noise, high-efficiency conversion from 12 V intermediate bus. IC Role / Device Role / Timing Role: Single-phase converter with fixed 500 kHz frequency and integrated low-RDS(on) power stage. Use Value: Delivers >92% efficiency at full load (12 V → 3.3 V) with <3 W total power loss, minimizing thermal impact in dense M.2 modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543B20RJER | 25-A rated; same LQFN-CLIP package but lower current capability and no VSHARE/ISHARE pins. | Limited to single-rail 25-A loads; cannot support stacking or precise multi-phase current sharing. | Select when system load ≤25 A and board space constraints favor identical footprint without stacking need. |
| ISL9123IRAJZ-T7A | 30-A, 2.5–5.5 V input; uses external MOSFETs and requires full compensation network. | Requires additional gate drivers, discrete FETs, and compensation components; higher BOM count and layout complexity. | Choose when input voltage is <4 V or when design flexibility with discrete power stage outweighs integration benefits. |
Compared with TPS543C20ARVFR, TPS543B20RJER offers footprint compatibility but sacrifices 37.5% output current and stacking capability, while ISL9123IRAJZ-T7A trades integration for wider low-voltage input support and external power stage control-neither matches the 40-A stackable performance with zero external compensation.
Availability
TPS543C20ARVFR is available at Aetrix Electronics and suitable for enterprise server power delivery, ASIC/FPGA core rail generation, and wireless infrastructure equipment requiring stable component supply and long-term production continuity.
Supply support for TPS543C20ARVFR 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 decades of high-reliability DC/DC converter design expertise.
The TPS543C20ARVFR belongs to TI's SWIFT™ synchronous buck converter family, engineered for high-density, high-efficiency point-of-load regulation in datacenter, telecom, and computing applications demanding 40+ A per rail.
FAQ
What is the maximum output current capability of the TPS543C20ARVFR?
The TPS543C20ARVFR delivers up to 40 A continuous output current from a single 5-mm × 7-mm LQFN-CLIP package. When two TPS543C20ARVFR units are stacked using ISHARE/VSHARE pins, the combined solution supports up to 80 A with matched current sharing (±15% error above 20 A per phase), making it suitable for high-performance CPU and ASIC core rails.
Does the TPS543C20ARVFR require external compensation components?
No, the TPS543C20ARVFR uses an internally compensated emulated peak-current-mode (ACM) control architecture with a programmable internal ramp generator. This eliminates the need for external Type II or Type III compensation networks, enabling stable operation with MLCC-only output filters across its full 300 kHz–2 MHz switching frequency range.
How does the TPS543C20ARVFR handle prebiased output conditions during startup?
The TPS543C20ARVFR implements safe prebias startup: SW pulses are suppressed until the internal soft-start voltage exceeds the sensed output voltage. Once enabled, low-side MOSFET on-time increases gradually over 128 cycles to avoid sinking current from the precharged rail-ensuring monotonic, non-destructive voltage ramp-up in systems like hot-pluggable SSDs or FPGA mezzanine cards.
What is the purpose of the RAMP and MODE pins on the TPS543C20ARVFR?
The RAMP pin selects one of ten internal ramp amplitudes via a resistor to AGND, optimizing loop stability for specific inductor values and output capacitor ESR. The MODE pin configures API/body braking activation, API threshold level, and master/slave behavior in stacked configurations-enabling fine-grained transient performance tuning without changing external components.
Can the TPS543C20ARVFR operate with input voltages below 4 V?
No-the TPS543C20ARVFR has a specified minimum input voltage of 4 V per its recommended operating conditions. Attempting operation below this threshold may result in UVLO shutdown or unstable regulation. For sub-4-V applications, consider alternatives such as the ISL9123IRAJZ-T7A (2.5 V min) or TI's TPS546D24 (3 V min), both requiring external compensation and discrete FETs.
TPS543C20ARVFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- 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):
- 4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 40A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-LQFN-CLIP (7x5)
TPS543C20ARVFR FAQ
1.How can I place an order for TPS543C20ARVFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS543C20ARVFR 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 TPS543C20ARVFR reliable?
The price and inventory of TPS543C20ARVFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS543C20ARVFR is usually 5 days.
3.What payment methods are accepted for TPS543C20ARVFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS543C20ARVFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS543C20ARVFR?
TPS543C20ARVFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS543C20ARVFR 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 TPS543C20ARVFR?
For technical support, including TPS543C20ARVFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS543C20ARVFR requirements.
6.How does Aetrix verify that TPS543C20ARVFR is sourced from the original manufacturer or authorized distributors?
All TPS543C20ARVFR 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 TPS543C20ARVFR meets industry standards.
7.What is the process for return or replacement of TPS543C20ARVFR?
All TPS543C20ARVFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS543C20ARVFR, 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 TPS543C20ARVFR part is unused and in its original packaging.
Return procedure for TPS543C20ARVFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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