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Texas Instruments TPS56C215RNNT
- Part No.:
- TPS56C215RNNT
- Manufacturer:
- Texas Instruments
- Package:
- 18-PowerVFQFN
- Datasheet:
-
TPS56C215RNNT.pdf
- Description:
- IC REG BUCK ADJ 12A 18VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,040
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Product details
Overview
TPS56C215RNNT from Texas Instruments is a monolithic 12A synchronous step-down DC/DC converter with integrated 7.8mΩ high-side and 3.2mΩ low-side MOSFETs, D-CAP3™ adaptive on-time control, and 0.6V ±1% reference voltage across –40°C to 150°C junction temperature. It operates from 3.8V–17V input, delivers 0.6V–5.5V output, and supports ceramic output capacitors in server point-of-load and FPGA core power applications.
For engineers reviewing the TPS56C215RNNT datasheet, TPS56C215RNNT pinout, TPS56C215RNNT application, or TPS56C215RNNT equivalent, key selection criteria include its selectable 400/800/1200 kHz switching frequency, dual current limit options (9.78A/11.73A valley), forced continuous conduction mode (FCCM) for tight ripple, monotonic prebias start-up, and thermal performance validated up to 150°C TJ in the 3.5mm × 3.5mm HotRod™ QFN package.
Technical Context
The TPS56C215RNNT implements D-CAP3™ control with internal ramp injection and an error amplifier-unlike earlier D-CAP variants-enabling stable regulation with ultra-low-ESR ceramic capacitors without external compensation. Its adaptive on-time logic dynamically adjusts tON based on VIN, VOUT, and selected FSW, while zero-current detection enables seamless Eco-mode transition below ~1.2A load at 12VIN/1.2VOUT.
Control is configured via the MODE pin: resistor-divider voltage selects FSW (400/800/1200 kHz), light-load operation (Eco-mode or FCCM), and current limit (ILIM-1 or ILIM). The VREG5 pin serves as both 4.7V LDO output and external bias input; when overdriven with ≥4.83V, it disables the internal LDO and reduces quiescent current by bypassing VIN-derived supply paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 17V - supports 5V, 12V, and 15V intermediate bus architectures without derating. |
| Output Current | 12A continuous - rated for sustained 100% duty under 105°C TJ per TI reliability requirements. |
| Feedback Reference | 0.6V ±1% over –40°C to 150°C - enables precise core voltage regulation for FPGAs and DSPs. |
| Switching Frequency | Selectable 400/800/1200 kHz - trade-off between inductor size (higher FSW → smaller L) and efficiency (lower FSW → lower switching loss). |
| Integrated MOSFETs | 7.8mΩ HS / 3.2mΩ LS - achieves >90% efficiency at 12A/1.2VOUT with 12VIN in FCCM mode. |
| Junction Temperature | –40°C to 150°C - qualified for industrial and telecom base station environments with no derating up to 125°C ambient (with proper PCB thermal design). |
| Thermal Resistance | RθJA = 29.5°C/W - requires ≥4 thermal vias under exposed PGND pad and 2oz copper for full 12A capability. |
Pinout & Package
TPS56C215RNNT uses a thermally enhanced 18-pin VQFN-HR (HotRod™) package, 3.5mm × 3.5mm, with exposed PGND pad for optimal heat dissipation. Pin numbering follows standard bottom-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (1) | High-side gate driver supply | Connect 0.1µF ceramic bootstrap capacitor between BOOT and SW; critical for HS MOSFET turn-on integrity. |
| VIN (2,11) | Main input power rail | Dual pins reduce IR drop and AC impedance; place 10µF+ X5R/X7R ceramic decoupling within 3mm of each pin. |
| PGND (3,4,5,8,9,10) | Power ground return | Six dedicated PGND pins tie internal power circuits and MOSFET sources to PCB ground plane; must connect directly to thermal pad. |
| SW (6,7) | Switch node | Drives external inductor; high di/dt path requiring minimal loop area and direct routing to inductor terminal. |
| AGND (12) | Analog reference ground | Separate analog ground for FB/SS/EN; connect to PGND plane via single short trace near IC to avoid noise coupling. |
| FB (13) | Feedback input | Resistor divider center tap; high-impedance node sensitive to noise-route away from SW and PGND traces. |
| SS (14) | Soft-start timing | Capacitor-to-ground sets soft-start time (tSS ≈ 1.2ms × CSS/1nF); default 1ms with no cap. |
| EN (15) | Enable control | Internal pullup enables device when floating; UVLO threshold is 1.225V (H) / 1.104V (L) with 121mV hysteresis. |
| PGOOD (16) | Open-drain status flag | Asserts low during UV/OV fault, thermal shutdown, or soft-start; requires external 10kΩ pullup to VOUT or VREG5. |
| VREG5 (17) | 4.7V LDO output / external bias input | Bypass with 4.7µF ceramic; external 5V applied here improves light-load efficiency by powering internal circuitry off VIN. |
| MODE (18) | Configuration select | Voltage divider from VREG5→AGND sets FSW, current limit, and Eco/FCCM mode per Table 6-3 in datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control with error amplifier | Enables stable regulation with ceramic output caps and no external compensation-reduces BOM count and layout sensitivity. |
| Selectably forced CCM (FCCM) | Maintains constant switching frequency under all loads, minimizing output voltage ripple (<±5mV p-p at 12A) for noise-sensitive DSP/FPGA cores. |
| Monotonic start-up into prebiased outputs | Prevents reverse current flow during hot-swap or partial-power sequencing-critical for multi-rail systems with powered-backup rails. |
| Two adjustable valley current limits | ILIM-1 (9.78–13.23A) and ILIM (11.73–15.87A) allow optimization for inrush limiting vs. overload robustness without changing layout. |
| Thermally rugged HotRod™ QFN | Exposed PGND pad + six ground pins achieve RθJB = 8.6°C/W-supports 12A continuous in 1-in² PCB area with 2oz copper. |
| External VREG5 bias support | Accepts 4.83–5.2V external supply on VREG5 pin to eliminate internal LDO losses, improving light-load efficiency by up to 3.5% at 100mA. |
Applications
| Server Point-of-Load | FPGA Core Power |
|---|---|
|
Use Scenario: Delivering 1.2V/12A to high-end Xilinx Versal or Intel Agilex FPGA cores from a 12V intermediate bus in 1U rack servers. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise core voltage with monotonic startup and fast transient response (<5µs to settle ±2% after 6A step). Use Value: D-CAP3™ control eliminates need for external compensation, reducing design cycle time; FCCM mode ensures <10mV ripple under full load for signal integrity. |
Use Scenario: Powering ARM-based SoC clusters in cloud data center accelerators where thermal density exceeds 40W/in². IC Role / Device Role / Timing Role: High-density POL converter operating at 1200kHz to minimize inductor footprint while maintaining >88% efficiency at 12A. Use Value: 3.5mm × 3.5mm HotRod™ package with six PGND pins enables 12A delivery in <12mm² board area; RθJB = 8.6°C/W sustains operation at 85°C ambient. |
| Telecom Baseband Processing | Industrial PLC I/O Module |
|
Use Scenario: Generating 3.3V/8A for multi-core DSPs in 5G massive MIMO radio units with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Synchronous buck supplying clean, sequenced power with PGOOD monitoring and hiccup-restart overcurrent protection. Use Value: Selectable 800kHz FSW balances EMI filtering cost and efficiency; Eco-mode extends battery backup runtime during idle periods. |
Use Scenario: Providing 5.0V/6A to isolated CAN/RS-485 transceivers and microcontroller peripherals in factory automation controllers. IC Role / Device Role / Timing Role: Robust POL regulator surviving –40°C to 85°C ambient with 150°C junction rating and 160°C thermal shutdown. Use Value: Dual current limit settings allow conservative 9.78A setting for long-life reliability; VREG5 external bias option reduces standby power in always-on modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS568215RNNT | 8A rated, pin-to-pin compatible, identical package and feature set except lower current capability and reduced RDS(on) (6.2mΩ/2.8mΩ). | Targeted at lower-power DSPs or dual-core processors where 8A suffices; not suitable for 12A FPGA core rails. | Select TPS568215RNNT only when peak load ≤8A and board reuse is prioritized over margin. |
| MP2451DT-LF-Z | Monolithic 0.6A buck, 4.5–26V input, fixed 500kHz FSW, no Eco-mode or FCCM selection, 1.2V reference tolerance ±2%. | Designed for auxiliary rails (e.g., USB PHY, sensors) - lacks current capacity, thermal rating, and configurability for main processor rails. | Use MP2451DT-LF-Z only for non-critical 5V/3.3V peripheral supplies where cost and simplicity outweigh performance needs. |
Compared with TPS56C215RNNT, TPS568215RNNT offers identical layout compatibility but 33% lower current headroom, while MP2451DT-LF-Z provides basic conversion at one-fifth the current rating and no advanced control modes-neither matches the 12A, 150°C, D-CAP3™ combination required for high-performance compute rails.
Availability
TPS56C215RNNT is available at Aetrix Electronics and suitable for server power delivery, telecom baseband processing, and industrial PLC I/O modules requiring stable component supply with full production lifecycle support.
Supply support for TPS56C215RNNT 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.
The TPS56C215RNNT belongs to TI's SWIFT™ family of high-density DC/DC converters, engineered specifically for space-constrained, high-current point-of-load applications in datacenter, networking, and industrial equipment.
FAQ
What is the maximum continuous output current supported by the TPS56C215RNNT?
The TPS56C215RNNT is rated for 12A continuous output current under recommended operating conditions (TJ ≤ 105°C, 100k hours reliability target). Absolute maximum rating is 14A, but sustained operation above 12A requires derating per TI's electromigration guidelines and enhanced thermal design.
Does the TPS56C215RNNT require external compensation components?
No, the TPS56C215RNNT uses D-CAP3™ control with internal ramp injection and an integrated error amplifier, eliminating the need for external compensation networks. This simplifies design and improves stability with ceramic output capacitors without tuning.
How is switching frequency selected on the TPS56C215RNNT?
Switching frequency (400/800/1200 kHz) is set by applying a specific voltage to the MODE pin using a resistor divider from VREG5 to AGND. Each voltage range corresponds to a defined FSW, current limit, and Eco/FCCM mode per Table 6-3 in the datasheet.
Can the TPS56C215RNNT start up into a prebiased output?
Yes, the TPS56C215RNNT supports monotonic start-up into prebiased outputs. Its control architecture prevents reverse inductor current during startup, making it suitable for hot-swap and multi-rail sequencing applications without external circuitry.
What thermal performance can be expected from the TPS56C215RNNT in a standard 4-layer PCB?
In a typical 4-layer board with 2oz copper, 4 thermal vias under the exposed PGND pad, and adequate airflow, the TPS56C215RNNT achieves RθJA ≈ 29.5°C/W. At 12A/1.2V output with 12V input, junction temperature rise is ~125°C above ambient-requiring ≤25°C ambient for full 150°C TJ compliance.
TPS56C215RNNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 18-PowerVFQFN
- 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):
- 17V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 12A
- Frequency - Switching:
- 400kHz, 800kHz, 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-VQFN-HR (3.5x3.5)
TPS56C215RNNT FAQ
1.How can I place an order for TPS56C215RNNT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56C215RNNT 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 TPS56C215RNNT reliable?
The price and inventory of TPS56C215RNNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56C215RNNT is usually 5 days.
3.What payment methods are accepted for TPS56C215RNNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56C215RNNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56C215RNNT?
TPS56C215RNNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56C215RNNT 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 TPS56C215RNNT?
For technical support, including TPS56C215RNNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56C215RNNT requirements.
6.How does Aetrix verify that TPS56C215RNNT is sourced from the original manufacturer or authorized distributors?
All TPS56C215RNNT 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 TPS56C215RNNT meets industry standards.
7.What is the process for return or replacement of TPS56C215RNNT?
All TPS56C215RNNT units undergo pre-shipment inspection (PSI). If there is an issue with TPS56C215RNNT, 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 TPS56C215RNNT part is unused and in its original packaging.
Return procedure for TPS56C215RNNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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