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

Texas Instruments TPS568215OARNNT

Name: TPS568215OARNNT
Brand: Texas Instruments
SKU: TPS568215OARNNT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS568215OARNNT

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 18-PowerVFQFN

Datasheet:: TPS568215OARNNT.pdf

Description:: IC REG BUCK ADJ/0.6V 8A 18VQFN

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Product details

Overview

TPS568215OARNNT from Texas Instruments is a monolithic 8-A synchronous step-down DC/DC converter with D-CAP3™ adaptive on-time control, integrated 19-mΩ high-side and 9.4-mΩ low-side MOSFETs, 4.5–17-V input range, 0.6–5.5-V output range, and selectable 400/800/1200-kHz switching frequency. It delivers high efficiency in server power rails and FPGA core supplies.

For engineers reviewing the TPS568215OARNNT datasheet, TPS568215OARNNT pinout, TPS568215OARNNT application, or TPS568215OARNNT equivalent, key selection considerations include its out-of-audio (OOA) light-load mode, adjustable valley current limit (6–10 A), monotonic pre-biased startup, 0.6 V ±1% reference accuracy over –40°C to 150°C, and support for all-ceramic output capacitors without external compensation.

Technical Context

The TPS568215OARNNT employs D-CAP3™ control with internal ripple injection-zero frequency shifts with selected FSW (7.1 kHz at 400 kHz, 14.3 kHz at 800 kHz, 21.4 kHz at 1200 kHz)-enabling stable regulation with ultra-low-ESR ceramic capacitors and eliminating need for external loop compensation. Its adaptive on-time architecture ensures fast transient response and seamless transition between forced continuous conduction mode (FCCM) and OOA mode.

Startup sequencing is governed by internal soft-start (1 ms default), VREG5 LDO biasing (4.7 V ±2.5%), and MODE pin resistor-programmable configuration of current limit, switching frequency, and light-load behavior. Thermal protection includes 160°C junction shutdown with 15°C hysteresis and separate 171°C VREG5 thermal shutdown.

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 architectures without derating.
Output Current	8 A continuous - rated for sustained operation at full load with proper PCB thermal design (RθJB = 10.0°C/W).
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 regulation with minimal drift.
Switching Frequency	400 / 800 / 1200 kHz - selectable via MODE pin resistor divider; higher frequencies reduce inductor size but trade off conduction loss.
Current Limit Options	6 A (ILIM−1), 8 A (ILIM), or 10 A (ILIM+1) - valley-current-based, configurable per application load margin and thermal budget.
Efficiency Peak	95% at 12 V_IN/1.2 V_OUT/4 A - achieved using integrated low-R_DS(on) MOSFETs and optimized gate drive.
Thermal Shutdown	160°C junction temperature with 15°C hysteresis - protects against sustained overload or airflow loss in enclosed systems.

Pinout & Package

TPS568215OARNNT is housed in an 18-pin VQFN (RNN) package measuring 3.5 mm × 3.5 mm with exposed thermal pad. The HotRod™ QFN construction minimizes parasitic inductance and improves thermal performance via direct die-to-PCB conduction.

Pin/Terminal	Circuit Role	Design Meaning
1 BOOT	Bootstrap supply	Drives high-side MOSFET gate; requires 0.1-µF capacitor to SW to sustain gate voltage during high-side conduction.
2,11 VIN	Main input supply	Power input for control circuitry and high-side driver; must be decoupled locally to PGND with ≥10 µF ceramic capacitance.
3,4,5,8,9,10 PGND	Power ground	Low-impedance return path for high-current switch node and internal power circuits; connects directly to thermal pad.
6,7 SW	Switch node	Connection point for output inductor; experiences full VIN-to-VOUT swing at switching frequency; layout critical for EMI.
12 AGND	Analog ground	Reference for feedback, soft-start, and enable circuits; must tie to PGND at single point near FB/SS pins to avoid noise coupling.
13 FB	Feedback input	Senses output voltage via resistor divider; internal 0.6 V reference sets V_OUT = 0.6 × (1 + R_UPPER/R_LOWER).
14 SS	Soft-start control	Charged by 6 µA internal current; external capacitor sets ramp time (t_SS ≈ 0.6 V × C_SS / 6 µA); defaults to 1 ms if unconnected.
15 EN	Enable input	Active-high logic control; 1.225 V turn-on threshold; internal pull-up allows floating-enable operation; UVLO adjustable via resistor divider.
16 PGOOD	Power-good indicator	Open-drain output asserted low when V_OUT falls below 93% or rises above 116% of V_FB, or during thermal/shutdown events.
17 VREG5	Internal LDO output	4.7 V ±2.5% regulated supply for internal circuitry; can be overdriven externally with 5 V to improve efficiency; bypass with 4.7 µF.
18 MODE	Configuration select	Resistor-divider input (to VREG5/AGND) that latches 1 of 16 operating modes at startup-sets FSW, current limit, and light-load mode.

Key Features

Feature	Design Value
D-CAP3™ Control Mode	Enables fast transient response (<10 µs recovery for 50% load step) and eliminates need for external compensation components.
Out-of-Audio (OOA) Operation	Maintains minimum 25 kHz switching frequency under light/no load, preventing audible coil whine in consumer electronics.
Adjustable Valley Current Limit	Three settings (6/8/10 A) configured via MODE pin, allowing precise overcurrent protection matching system-level fuse or thermal limits.
Monotonic Pre-biased Startup	Prevents reverse current flow into pre-charged output rails-critical for hot-swap and multi-rail sequencing in servers and storage.
VREG5 External Bias Support	Accepts external 5 V on VREG5 pin to reduce quiescent current draw from VIN, improving light-load efficiency by up to 2.5 percentage points.
Thermally Enhanced HotRod™ QFN	18-pin 3.5 mm × 3.5 mm package with exposed thermal pad achieves RθJB = 10.0°C/W, enabling 8 A operation in compact layouts.

Applications

Server Core Power	FPGA I/O Bank Supply
Use Scenario: Regulating 1.2 V core voltage for high-performance Xeon or EPYC processors in 1U rack servers with strict airflow constraints. IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 8 A with tight voltage regulation (±1%) and fast load-step response to handle CPU DVFS transitions. Use Value: D-CAP3™ control ensures sub-10 µs transient recovery; FCCM mode maintains regulation during burst workloads without frequency foldback.	Use Scenario: Powering 1.8 V or 2.5 V I/O banks on Xilinx Versal or Intel Agilex FPGAs where rail sequencing and monotonic startup are mandatory. IC Role / Device Role / Timing Role: Secondary buck converter with programmable soft-start and pre-biased capability to meet FPGA power-on requirements. Use Value: Monotonic startup prevents back-driving of powered I/O pins; MODE pin configuration allows matching current limit to bank-specific drive strength.
Laptop GPU Core Rail	Industrial PLC CPU Module
Use Scenario: Delivering 0.85 V @ 6–8 A to discrete or integrated GPU cores in thin-and-light notebooks with limited board area. IC Role / Device Role / Timing Role: High-density step-down converter operating from 12 V intermediate bus, leveraging 3.5 mm × 3.5 mm footprint and OOA mode for silent operation. Use Value: 400 kHz FSW option balances efficiency and component size; ceramic-capacitor compatibility reduces solution volume vs. polymer alternatives.	Use Scenario: Providing 3.3 V @ 5 A to ARM Cortex-A series CPUs in DIN-rail mounted PLC controllers requiring extended temperature operation. IC Role / Device Role / Timing Role: Industrial-grade buck regulator supporting –40°C to 150°C junction range with robust thermal shutdown and UVLO protection. Use Value: 160°C thermal shutdown and 4.5–17 V input range ensure reliability across wide industrial input variations and ambient conditions.

Server Core Power

FPGA I/O Bank Supply

Use Scenario: Regulating 1.2 V core voltage for high-performance Xeon or EPYC processors in 1U rack servers with strict airflow constraints.

IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 8 A with tight voltage regulation (±1%) and fast load-step response to handle CPU DVFS transitions.

Use Value: D-CAP3™ control ensures sub-10 µs transient recovery; FCCM mode maintains regulation during burst workloads without frequency foldback.

Use Scenario: Powering 1.8 V or 2.5 V I/O banks on Xilinx Versal or Intel Agilex FPGAs where rail sequencing and monotonic startup are mandatory.

IC Role / Device Role / Timing Role: Secondary buck converter with programmable soft-start and pre-biased capability to meet FPGA power-on requirements.

Use Value: Monotonic startup prevents back-driving of powered I/O pins; MODE pin configuration allows matching current limit to bank-specific drive strength.

Laptop GPU Core Rail

Industrial PLC CPU Module

Use Scenario: Delivering 0.85 V @ 6–8 A to discrete or integrated GPU cores in thin-and-light notebooks with limited board area.

IC Role / Device Role / Timing Role: High-density step-down converter operating from 12 V intermediate bus, leveraging 3.5 mm × 3.5 mm footprint and OOA mode for silent operation.

Use Value: 400 kHz FSW option balances efficiency and component size; ceramic-capacitor compatibility reduces solution volume vs. polymer alternatives.

Use Scenario: Providing 3.3 V @ 5 A to ARM Cortex-A series CPUs in DIN-rail mounted PLC controllers requiring extended temperature operation.

IC Role / Device Role / Timing Role: Industrial-grade buck regulator supporting –40°C to 150°C junction range with robust thermal shutdown and UVLO protection.

Use Value: 160°C thermal shutdown and 4.5–17 V input range ensure reliability across wide industrial input variations and ambient conditions.

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	Same silicon, identical electrical specs, but uses standard VQFN (no HotRod™ copper pillars); RθJA = 45.2°C/W vs. 42.3°C/W.	Lower thermal performance in high-power density designs; suitable where cost sensitivity outweighs 3°C/W junction rise.	Select TPS568215RNNT only if BOM cost reduction is prioritized over thermal headroom in 8 A continuous operation.
TPS56C215RNNT	12 A rated version with same pinout and package; higher R_DS(on) (16 mΩ/7.5 mΩ) and lower peak efficiency at 8 A due to larger die capacitance.	Over-spec'd current rating increases solution cost and may degrade light-load efficiency; not drop-in for thermal-limited boards.	Choose TPS56C215RNNT only when future-proofing for 10–12 A loads or when shared layout across 6–12 A variants is required.

Compared with TPS568215RNNT, the TPS568215OARNNT delivers 3°C/W lower junction-to-ambient thermal resistance via HotRod™ construction, enabling higher sustained current in thermally constrained spaces; versus TPS56C215RNNT, it trades peak current headroom for optimized 8 A efficiency and smaller gate drive losses.

Availability

TPS568215OARNNT is available at Aetrix Electronics and suitable for server power rails, FPGA core supplies, laptop GPU regulators, and industrial PLC CPU modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS568215OARNNT 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and automotive-grade reliability.

The TPS568215OARNNT belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained, high-current applications in datacenter, computing, and industrial systems where thermal performance and transient response are critical.

FAQ

What is the maximum continuous output current supported by the TPS568215OARNNT?

The TPS568215OARNNT is rated for 8 A continuous output current under recommended operating conditions (T_J ≤ 150°C, proper PCB thermal design). Its valley current limit can be configured to 6 A, 8 A, or 10 A via the MODE pin, but sustained 10 A operation is only validated at 400 kHz and 800 kHz switching frequencies-not at 1200 kHz-due to thermal and conduction loss constraints. The device's 19-mΩ/9.4-mΩ MOSFETs and 10.0°C/W junction-to-board thermal resistance enable reliable 8 A delivery in typical 4-layer board layouts.

How does the TPS568215OARNNT achieve fast transient response without external compensation?

The TPS568215OARNNT achieves fast transient response through its proprietary D-CAP3™ adaptive on-time control architecture, which integrates internal ripple injection proportional to switching frequency (e.g., 7.1 kHz zero at 400 kHz FSW). This eliminates the need for external compensation networks while providing >90° phase boost near crossover, enabling <10 µs recovery from 50% load steps. The error amplifier and internal ramp generator maintain 0.6 V ±1% reference accuracy across temperature, ensuring tight regulation during rapid transients without stability trade-offs.

Can the TPS568215OARNNT start up safely into a pre-biased output voltage?

Yes, the TPS568215OARNNT supports monotonic startup into pre-biased outputs. When enabled, it monitors the FB pin voltage and delays switching until the internal soft-start reference exceeds the existing V_OUT, preventing reverse current flow through the low-side MOSFET. This behavior is inherent to the control architecture and requires no external circuitry-making it ideal for FPGA, ASIC, and multi-rail systems where output capacitors may retain charge during power sequencing.

What is the purpose of the VREG5 pin on the TPS568215OARNNT, and how should it be used?

The VREG5 pin on the TPS568215OARNNT is the output of an internal 4.7 V ±2.5% LDO that powers all internal circuitry and gate drivers. It must be bypassed with a 4.7 µF ceramic capacitor to AGND. Crucially, this pin accepts external 5 V bias-when applied, the internal LDO shuts off and the device draws quiescent current from the external rail, improving light-load efficiency by up to 2.5 percentage points. External bias must be stable and capable of sinking ≤200 mA, as exceeding the LDO's current limit will cause VREG5 collapse and device shutdown.

How is switching frequency selected on the TPS568215OARNNT, and what are the trade-offs between options?

Switching frequency on the TPS568215OARNNT-400 kHz, 800 kHz, or 1200 kHz-is selected exclusively via resistor divider on the MODE pin, with values defined in Table 3 of the datasheet. Lower frequencies (400 kHz) maximize efficiency at high load by reducing switching losses; higher frequencies (1200 kHz) minimize inductor and capacitor size but increase gate and switching losses. All three options support both FCCM (for tight regulation) and OOA (for silent light-load operation), with OOA ensuring minimum 25 kHz frequency to avoid audible noise.

TPS568215OARNNT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: SWIFT™

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)

TPS568215OARNNT FAQ

1.How can I place an order for TPS568215OARNNT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS568215OARNNT 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 TPS568215OARNNT reliable?

The price and inventory of TPS568215OARNNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS568215OARNNT is usually 5 days.

3.What payment methods are accepted for TPS568215OARNNT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS568215OARNNT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS568215OARNNT?

TPS568215OARNNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS568215OARNNT 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 TPS568215OARNNT?

For technical support, including TPS568215OARNNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS568215OARNNT requirements.

6.How does Aetrix verify that TPS568215OARNNT is sourced from the original manufacturer or authorized distributors?

All TPS568215OARNNT 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 TPS568215OARNNT meets industry standards.

7.What is the process for return or replacement of TPS568215OARNNT?

All TPS568215OARNNT units undergo pre-shipment inspection (PSI). If there is an issue with TPS568215OARNNT, 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 TPS568215OARNNT part is unused and in its original packaging.

Return procedure for TPS568215OARNNT:

1.Submit a request within 90 days.

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

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