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Texas Instruments TPS568215RNNR
- Part No.:
- TPS568215RNNR
- Manufacturer:
- Texas Instruments
- Package:
- 18-PowerVFQFN
- Datasheet:
-
TPS568215RNNR.pdf
- Description:
- IC REG BUCK ADJ/0.6V 8A 18VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
TPS568215RNNR from Texas Instruments is an 8-A synchronous step-down DC/DC converter with integrated 19-mΩ high-side and 9.4-mΩ low-side MOSFETs, D-CAP3™ adaptive on-time control, and selectable 400/800/1200 kHz switching frequency. It delivers 0.6–5.5 V output with ±1% reference accuracy across –40°C to 150°C, supporting server point-of-load and FPGA core power applications.
For engineers reviewing the TPS568215RNNR datasheet, TPS568215RNNR pinout, TPS568215RNNR application, or TPS568215RNNR equivalent, key selection criteria include its monolithic HotRod™ QFN-18 package, adjustable current limit with hiccup restart, FCCM/Eco-mode™ light-load efficiency trade-off, external 5-V bias support for enhanced efficiency, and monotonic start-up into pre-biased outputs.
Technical Context
The TPS568215RNNR implements D-CAP3™ control with internal ripple injection-zero frequency scaled to switching frequency (7.1 kHz at 400 kHz, 14.3 kHz at 800 kHz, 21.4 kHz at 1200 kHz)-enabling stable regulation with all-ceramic output capacitors and no external compensation. Its adaptive on-time architecture achieves fast transient response without loop tuning.
It supports dual operating modes via MODE pin configuration: forced continuous conduction mode (FCCM) for tight output voltage ripple (<±10 mV at 8 A), or auto-skipping Eco-mode™ for >85% efficiency at 10 mA load. Current limit is configurable between 6 A (ILIM-1) and 8 A (ILIM) using valley-current sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 17 V - supports 5 V, 12 V, and 15 V intermediate bus rails without derating. |
| Output Current | 8 A continuous - rated for sustained operation up to 150°C junction temperature per TI reliability requirements. |
| Feedback Reference | 0.6 V ±1% over –40°C to 150°C - enables precise 1.2 V, 1.8 V, or 3.3 V core rail generation with minimal drift. |
| Switching Frequency | 400 / 800 / 1200 kHz - selectable via MODE pin resistor divider; higher frequencies reduce inductor size but increase switching loss. |
| Integrated MOSFETs | 19 mΩ HS / 9.4 mΩ LS - enables >92% peak efficiency at 12 VIN/1.2 VOUT, 8 A, 400 kHz with ceramic output caps. |
| Thermal Resistance | RθJA = 42.3°C/W - validated for 3.5 mm × 3.5 mm HotRod™ QFN package with 2 oz copper and 2 thermal vias per pad. |
| Soft Start | 1 ms default (adjustable via SS capacitor) - ensures monotonic ramp-up into pre-biased outputs without reverse current. |
Pinout & Package
TPS568215RNNR uses a thermally enhanced 18-pin VQFN (RNN) package, 3.5 mm × 3.5 mm, 0.5 mm pitch, exposed thermal pad. Package optimized for low-inductance power delivery and PCB-level thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 11 VIN | Input power supply | Connects to input decoupling capacitors; shared among three pins to reduce trace inductance and IR drop. |
| 3, 4, 5, 8, 9, 10 PGND | Power ground | High-current return path for MOSFETs and inductor; multiple pins minimize ground bounce and improve EMI. |
| 6, 7 SW | Switch node | Drives external inductor; requires short, low-inductance layout to minimize ringing and switching losses. |
| 12 AGND | Analog ground | Reference for FB, SS, EN; must be connected to PGND at single point near IC to avoid noise coupling. |
| 13 FB | Feedback input | Monitors output voltage via resistor divider; high-impedance input enables precision regulation without loading. |
| 14 SS | Soft-start timing | Sets soft-start duration via external capacitor; open-circuit defaults to 1 ms for plug-and-play startup. |
| 15 EN | Enable control | Active-high logic input; internal pull-up allows operation with floating pin; UVLO threshold at 1.2 V typical. |
| 16 PGOOD | Power-good indicator | Open-drain output asserting low during fault conditions (UVP/OVP/thermal shutdown/soft-start). |
| 17 VREG5 | Internal LDO output | 4.7 V ±2.7% regulated supply for internal circuitry; can be overdriven externally with 5 V to improve efficiency. |
| 18 MODE | Configuration interface | Resistor-divider input selecting FSW, current limit, and light-load mode; latched at power-up only. |
| 1 BOOT | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF ceramic capacitor between BOOT and SW. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Eliminates need for external compensation components while enabling <10 µs load transient response with 1% output deviation. |
| Selectable Eco-mode™/FCCM | Auto-skipping at light loads improves efficiency to >88% at 10 mA; FCCM maintains <15 mV p-p ripple under full 8 A load. |
| Adjustable current limit | Two valley-current thresholds (6 A or 8 A) configured via MODE pin, enabling safe operation with undersized inductors or high-temperature derating. |
| External 5-V bias support | VREG5 pin accepts external 5 V supply, reducing quiescent current draw from VIN and improving full-load efficiency by up to 1.2%. |
| Monotonic pre-biased start-up | Prevents reverse current flow into powered outputs during hot-insertion or multi-rail sequencing scenarios. |
Applications
| Server Point-of-Load | FPGA Core Power |
|---|---|
Use Scenario: Delivering tightly regulated 0.85–1.2 V at up to 8 A to Xilinx Versal or Intel Agilex FPGA cores in 1U rack servers. IC Role / Device Role / Timing Role: Primary buck regulator providing dynamic voltage scaling (DVS) with sub-10 µs transient response to handle logic state changes. Use Value: Maintains <±1% output accuracy across –40°C to 125°C ambient, enabling reliable operation without margining or derating. | Use Scenario: Powering ARM-based SoC subsystems in telecom line cards requiring fast wake/sleep transitions and low standby power. IC Role / Device Role / Timing Role: High-efficiency POL converter operating in Eco-mode™ at idle (10–50 mA) and FCCM during burst processing (up to 8 A). Use Value: Achieves >85% efficiency at 10 mA and >92% at 8 A, reducing thermal load and eliminating need for heatsinks in dense modules. |
| Industrial PLC I/O Module | Networking Switch ASIC Supply |
Use Scenario: Generating isolated 3.3 V/5 V rails for digital I/O and communication interfaces in factory automation controllers. IC Role / Device Role / Timing Role: Secondary buck stage converting 12 V intermediate bus to clean, low-noise logic supplies with PGOOD monitoring. Use Value: Integrated MOSFETs and D-CAP3™ control eliminate external gate drivers and compensation, reducing BOM count by 7 parts. | Use Scenario: Supplying 1.0 V core voltage to Broadcom Tomahawk or Marvell Prestera switch ASICs in 10/25/100 GbE switches. IC Role / Device Role / Timing Role: High-density, thermally robust regulator mounted directly beneath ASIC to minimize PDN impedance. Use Value: 3.5 mm × 3.5 mm HotRod™ QFN package enables placement within 5 mm of ASIC die, cutting VRM loop inductance by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS568231RNNR | Pin-to-pin compatible 8-A device with identical RNN package, same D-CAP3™ control, but fixed 800 kHz FSW and no external VREG5 bias option. | Lacks selectable frequency and external bias capability; suited for cost-sensitive designs where 800 kHz is optimal and efficiency margin is acceptable. | Choose TPS568231RNNR when design lock-in eliminates need for frequency optimization or external bias, reducing MODE pin routing complexity. |
| TPS56C215RNNR | 12-A variant in same RNN footprint; shares MODE pin mapping and D-CAP3™ architecture but has lower RDS(on) (13 mΩ/6.5 mΩ) and higher current rating. | Supports higher output current with same PCB layout; requires updated inductor and output capacitor sizing for 12 A operation. | Choose TPS56C215RNNR when future-proofing for higher current or when thermal headroom is constrained and 12 A capability is needed. |
Compared with TPS568231RNNR, the TPS568215RNNR adds frequency flexibility and external bias support for efficiency tuning; compared with TPS56C215RNNR, it trades 4-A current headroom for tighter thermal margins and lower gate charge in space-constrained layouts.
Availability
TPS568215RNNR is available at Aetrix Electronics and suitable for server point-of-load, FPGA core power, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production lots.
Supply support for TPS568215RNNR 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 50 years of innovation in high-reliability power conversion solutions.
The TPS568215RNNR belongs to TI's SWIFT™ monolithic DC/DC converter family, engineered for high-density, high-efficiency point-of-load regulation in space-constrained computing and networking systems.
FAQ
What is the maximum continuous output current supported by the TPS568215RNNR?
The TPS568215RNNR is rated for 8 A continuous output current under recommended operating conditions (TJ ≤ 150°C). This rating is validated per TI's 100k-hour reliability requirement at 105°C junction temperature and accounts for electromigration limits in solder interconnects. Peak current capability reaches 10 A for short durations, but sustained operation above 8 A requires thermal derating based on PCB layout and airflow.
How does the MODE pin configure switching frequency and current limit on the TPS568215RNNR?
The MODE pin on the TPS568215RNNR accepts a resistor divider from VREG5 to AGND to select one of 12 configurations. For example, 5.1 kΩ (RM_L) and 300 kΩ (RM_H) sets 400 kHz FSW, ILIM-1 (6 A), and FCCM mode; 51 kΩ and 51 kΩ selects 1200 kHz, ILIM (8 A), and Eco-mode™. The voltage is sampled once at startup and latched-changes require VIN power cycle. TPS568215RNNR datasheet Table 7-3 lists all valid combinations.
Can the TPS568215RNNR operate with only ceramic output capacitors?
Yes, the TPS568215RNNR supports all-ceramic output capacitors due to its D-CAP3™ control architecture, which injects synthetic ripple to maintain stability with ultra-low-ESR MLCCs. No additional ESR network or tantalum/POSCAP is required. Typical designs use 2–4 × 22 µF/6.3 V X5R/X7R ceramics in parallel, enabling compact, low-profile layouts without electrolytic components.
What is the purpose of the VREG5 pin on the TPS568215RNNR, and how should it be bypassed?
The VREG5 pin on the TPS568215RNNR outputs a regulated 4.7 V supply for internal circuitry and gate drivers. It must be bypassed with a minimum 4.7 µF ceramic capacitor (X5R/X7R, 6.3 V rating) placed within 2 mm of the pin and connected to AGND. An external 5 V source may overdrive VREG5 to improve efficiency, but the internal LDO shuts down if discharge current exceeds 200 mA, so external rail sequencing must ensure no reverse current path exists.
Does the TPS568215RNNR support monotonic start-up into a pre-biased output?
Yes, the TPS568215RNNR features monotonic start-up into pre-biased outputs, preventing reverse current flow during hot-swap or multi-rail sequencing events. This behavior is inherent to its current-mode D-CAP3™ architecture and requires no external circuitry. The device monitors inductor current direction and disables high-side switching until output voltage rises above the feedback threshold, ensuring safe ramp-up even when VOUT is initially at 1.2 V or higher.
TPS568215RNNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 18-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 8A
- Frequency - Switching:
- Up to 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-VQFN-HR (3.5x3.5)
TPS568215RNNR FAQ
1.How can I place an order for TPS568215RNNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS568215RNNR 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 TPS568215RNNR reliable?
The price and inventory of TPS568215RNNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS568215RNNR is usually 5 days.
3.What payment methods are accepted for TPS568215RNNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS568215RNNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS568215RNNR?
TPS568215RNNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS568215RNNR 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 TPS568215RNNR?
For technical support, including TPS568215RNNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS568215RNNR requirements.
6.How does Aetrix verify that TPS568215RNNR is sourced from the original manufacturer or authorized distributors?
All TPS568215RNNR 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 TPS568215RNNR meets industry standards.
7.What is the process for return or replacement of TPS568215RNNR?
All TPS568215RNNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS568215RNNR, 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 TPS568215RNNR part is unused and in its original packaging.
Return procedure for TPS568215RNNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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