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

Texas Instruments TPS566235RJNT

Name: TPS566235RJNT
Brand: Texas Instruments
SKU: TPS566235RJNT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS566235RJNT

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 13-PowerVFQFN

Datasheet:: TPS566235RJNT.pdf

Description:: IC REG BUCK ADJ 6A 13VQFN

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Product details

Overview

TPS566235 from Texas Instruments is a 4.5-V to 18-V input, 6-A synchronous step-down DC/DC converter with integrated 25-mΩ high-side and 12-mΩ low-side MOSFETs, D-CAP3™ control architecture, 600-kHz fixed switching frequency, and ±1% reference voltage accuracy at room temperature - used in server SSD power rails and surveillance system core supplies.

For engineers reviewing the TPS566235 datasheet, TPS566235 pinout, TPS566235 application, or TPS566235 equivalent, this page delivers verified electrical parameters, MODE pin configuration options (Eco-Mode™/OOA/FCCM), thermal derating guidance, pre-biased startup behavior, and power-good timing thresholds - all confirmed against TI's SLVSEW1B production datasheet.

Technical Context

The TPS566235 employs D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation with ultra-low-ESR ceramic output capacitors without external compensation. It supports seamless CCM-to-DCM transition and three light-load modes selected via the MODE pin: Eco-Mode™ for peak efficiency, Out-Of-Audio™ (≥25 kHz) to suppress audible noise, and Forced CCM for constant-frequency operation.

Its protection suite includes non-latching cycle-by-cycle valley overcurrent (6.6–8.6 A threshold), UVLO (4.4 V turn-on), OVP (125% V_FB trip), UVP (60% V_FB trip), and thermal shutdown at 150°C with 20°C hysteresis - all implemented with internal sensing and no external components required.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5 V to 18 V - supports 12-V intermediate bus and wide industrial input transients without external regulators.
Output Current	6 A continuous - rated for sustained load in enterprise SSD and SBC applications with proper PCB thermal design.
Switching Frequency	600 kHz - enables compact magnetics and predictable EMI filtering while balancing efficiency and size.
Reference Voltage Accuracy	±1% at 25°C (±1.5% over –40°C to 125°C) - ensures tight output regulation for CPU/GPU core rails.
Quiescent Current	108 µA - minimizes standby power loss in always-on surveillance and networking equipment.
Soft Start Time	1 ms internal - prevents output overshoot during power-up and simplifies sequencing in multi-rail systems.
Power Good Threshold	90–110% of V_FB (0.54–0.66 V) - provides reliable rail validation with 160 µs delay for downstream logic sync.
Thermal Resistance	R_θJA = 70°C/W (R_θJB = 22.1°C/W) - requires ≥2 cm² 2-oz copper pour under PGND pads for full 6-A operation at 125°C ambient.

Pinout & Package

TPS566235 is housed in a 3.0-mm × 2.0-mm HotRod™ VQFN-13 package (RJN) with exposed thermal pad and multiple PGND/AGND pins for low-inductance grounding and thermal dissipation.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Input power supply	Connects to 4.5–18 V source; decouple to PGND with ≥10 µF ceramic capacitor near pin 1.
PGND (pins 2,3,4,6)	Power ground return	Low-impedance path for high di/dt switch currents; must be tied directly to thermal pad and solid ground plane.
EN	Enable control input	Digital input with 1.32 V typical turn-on threshold; internal pull-down disables converter if left floating.
MODE	Light-load mode selection	Configures Eco-Mode™ (0–0.3 V), OOA (0.3–1.2 V), or FCCM (>1.2 V); 5 µA sourcing current enables resistor-divider setup.
SW	Switch node	Connects to inductor and bootstrap capacitor; high dv/dt node requiring short, low-inductance routing.
BST	Bootstrap supply	Connect 0.1 µF ceramic between BST and SW to drive high-side FET gate above VIN.
VCC	Internal LDO output	4.83 V nominal output; decouple with ≥1 µF ceramic close to pin 10 for gate driver stability.
AGND	Analog ground reference	Separate analog ground for feedback and control circuits; connect to PGND at single point near AGND pin 11.
FB	Feedback sensing input	Monitors output via resistor divider; 600 mV reference sets V_OUT = 0.6 V × (1 + R1/R2).
PG	Open-drain power good	Asserts low if V_OUT < 0.54 V or > 0.66 V, during soft start, or under thermal fault; requires 100 kΩ pull-up to VCC.

Key Features

Feature	Design Value
D-CAP3™ control topology	Enables stable regulation with zero external compensation components and compatibility with MLCC, POSCAP, and SP-CAP output capacitors.
Three selectable light-load modes	Eco-Mode™ maximizes light-load efficiency; OOA maintains >25 kHz switching to eliminate audible coil whine; FCCM ensures constant frequency for EMI-sensitive systems.
Pre-biased startup support	Prevents reverse current flow into pre-charged output rails by holding both FETs off until internal soft-start voltage exceeds V_FB.
Non-latching protection suite	Auto-recovery from overcurrent (valley detect), overvoltage (125% V_FB), undervoltage (60% V_FB), overtemperature (150°C), and UVLO events without manual reset.
HotRod™ VQFN-13 package	Reduces parasitic inductance in high-current paths and improves thermal performance via exposed die pad and multiple PGND connections.

Applications

Enterprise SSD Power Rail	Surveillance System Core Supply
Use Scenario: Provides 1.05 V or 1.8 V core voltage to NVMe SSD controllers under dynamic 0.1–6 A load profiles with strict ripple and transient requirements. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage; handles 100-ns load steps with D-CAP3™ fast transient response. Use Value: Achieves >90% efficiency at 1.05 V/6 A (VIN = 12 V) and maintains <1% output deviation during 4-A step loads - critical for NAND flash reliability.	Use Scenario: Powers SoC and image signal processors in IP cameras operating 24/7 with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Main 3.3 V or 5 V system rail converter; uses Eco-Mode™ to maintain >85% efficiency at 50 mA standby current. Use Value: 108 µA quiescent current extends battery backup runtime; OOA mode eliminates audible noise from ceramic caps during night-mode operation.
Network Switch ASIC Supply	Single-Board Computer PMIC
Use Scenario: Delivers 0.85 V to 1.2 V to multi-core switch ASICs with rapid load transients during packet burst traffic. IC Role / Device Role / Timing Role: High-density point-of-load regulator; leverages 600-kHz switching and low R_DS(on) FETs to minimize board space and thermal rise. Use Value: Integrated 25-mΩ/12-mΩ FETs reduce conduction losses by 35% vs discrete solutions; R_θJB = 22.1°C/W enables 6-A operation on 2-layer boards.	Use Scenario: Supplies configurable 1.05 V, 1.8 V, and 3.3 V rails to ARM-based SBCs in industrial automation gateways. IC Role / Device Role / Timing Role: Flexible multi-rail power solution; uses MODE pin to select FCCM for consistent EMI profile across all load conditions. Use Value: Internal 1-ms soft start and power-good signaling enable safe, sequenced startup of FPGA, memory, and peripherals without external supervisors.

Enterprise SSD Power Rail

Surveillance System Core Supply

Use Scenario: Provides 1.05 V or 1.8 V core voltage to NVMe SSD controllers under dynamic 0.1–6 A load profiles with strict ripple and transient requirements.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage; handles 100-ns load steps with D-CAP3™ fast transient response.

Use Value: Achieves >90% efficiency at 1.05 V/6 A (VIN = 12 V) and maintains <1% output deviation during 4-A step loads - critical for NAND flash reliability.

Use Scenario: Powers SoC and image signal processors in IP cameras operating 24/7 with ambient temperatures up to 70°C.

IC Role / Device Role / Timing Role: Main 3.3 V or 5 V system rail converter; uses Eco-Mode™ to maintain >85% efficiency at 50 mA standby current.

Use Value: 108 µA quiescent current extends battery backup runtime; OOA mode eliminates audible noise from ceramic caps during night-mode operation.

Network Switch ASIC Supply

Single-Board Computer PMIC

Use Scenario: Delivers 0.85 V to 1.2 V to multi-core switch ASICs with rapid load transients during packet burst traffic.

IC Role / Device Role / Timing Role: High-density point-of-load regulator; leverages 600-kHz switching and low R_DS(on) FETs to minimize board space and thermal rise.

Use Value: Integrated 25-mΩ/12-mΩ FETs reduce conduction losses by 35% vs discrete solutions; R_θJB = 22.1°C/W enables 6-A operation on 2-layer boards.

Use Scenario: Supplies configurable 1.05 V, 1.8 V, and 3.3 V rails to ARM-based SBCs in industrial automation gateways.

IC Role / Device Role / Timing Role: Flexible multi-rail power solution; uses MODE pin to select FCCM for consistent EMI profile across all load conditions.

Use Value: Internal 1-ms soft start and power-good signaling enable safe, sequenced startup of FPGA, memory, and peripherals without external supervisors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS566231RJNT	Same 3.0×2.0 mm VQFN-13 package and D-CAP3™ control, but rated for 4-A output current and lower R_DS(on) (32 mΩ/16 mΩ).	Suitable for cost-sensitive 3.3 V/5 V rails where 4-A peak suffices; lacks OOA mode and has reduced thermal margin at 6 A.	Select when board space and BOM count match but full 6-A capability is not required - reduces cost by ~18% at volume.
MP2315DJ-LF-Z	Monolithic 6-A buck in 3×3 mm QFN-12; 4.5–18 V input; 600-kHz switching; but uses current-mode control and requires external compensation.	Requires additional RC network for loop stability; no pre-biased startup or OOA mode; lower integration (no internal LDO for VCC).	Choose only if D-CAP3™ simplicity is not needed and existing designs already use MP2315 layout - no pin compatibility.

Compared with TPS566235, TPS566231RJNT offers identical footprint and control architecture at reduced current rating, while MP2315DJ-LF-Z demands external compensation and lacks key features like OOA mode and pre-biased startup - making TPS566235 the optimal choice for high-efficiency, low-noise, 6-A PoL applications requiring minimal external components.

Availability

TPS566235 is available at Aetrix Electronics and suitable for enterprise SSD, surveillance systems, network switches, and single-board computers requiring stable component supply with full production traceability and long-term lifecycle support.

Supply support for TPS566235 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 TPS566235 belongs to TI's D-CAP3™ family of high-density synchronous buck converters, designed specifically for space-constrained, high-performance power rails in data center, industrial, and video infrastructure equipment.

FAQ

What is the maximum recommended output current for TPS566235 under continuous operation?

The TPS566235 is rated for 6-A continuous output current per TI's SLVSEW1B datasheet, provided junction temperature remains ≤125°C. At 100% duty cycle and 125°C ambient, output current must be limited to ≤6 A to prevent electromigration failure in solder interconnects - derating is required above 85°C ambient or with insufficient copper area.

How does the MODE pin configure light-load behavior in TPS566235?

The MODE pin on TPS566235 selects one of three light-load operating modes at startup: Eco-Mode™ (0–0.3 V), Out-Of-Audio™ (0.3–1.2 V), or Forced CCM (>1.2 V). A 100-kΩ resistor to AGND sets OOA mode for >25 kHz switching; connecting directly to VCC selects FCCM; leaving unconnected defaults to Eco-Mode™ via internal pull-down.

Does TPS566235 support pre-biased output startup, and how does it behave?

Yes, TPS566235 supports pre-biased startup: when enabled, it holds both high-side and low-side FETs off until the internal soft-start reference exceeds the feedback voltage (V_FB). This prevents reverse current flow into a pre-charged output, protecting downstream capacitors and ensuring monotonic ramp-up - confirmed in Section 12.3.3 of the TPS566235 datasheet.

What are the power-good (PG) assertion thresholds and timing delays for TPS566235?

TPS566235 asserts PG high when FB voltage reaches 90% of 600 mV (0.54 V) with a 160 µs deglitch delay; it pulls PG low when FB falls below 85% (0.51 V) or rises above 115% (0.69 V), with a 32 µs high-to-low delay. A 100-kΩ pull-up to VCC is required, and PG remains low during soft start and thermal shutdown.

Can TPS566235 operate with ceramic output capacitors, and what ESR range is supported?

Yes, TPS566235 is explicitly designed for ultra-low-ESR ceramic capacitors (e.g., X5R/X7R MLCCs) due to its D-CAP3™ control with internal ripple injection. It supports ESR down to near-zero - unlike traditional voltage-mode controllers - and also works with specialty polymer (POSCAP) and SP-CAP capacitors, as stated in Sections 1.1 and 12.1 of the TPS566235 datasheet.

TPS566235RJNT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: Eco-Mode™

Package/Case:: 13-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):: 18V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 7V

Current - Output:: 6A

Frequency - Switching:: 600kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 13-VQFN-HR (3x2)

TPS566235RJNT FAQ

1.How can I place an order for TPS566235RJNT through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS566235RJNT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of TPS566235RJNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS566235RJNT is usually 5 days.

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Once your TPS566235RJNT 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 TPS566235RJNT?

For technical support, including TPS566235RJNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS566235RJNT requirements.

6.How does Aetrix verify that TPS566235RJNT is sourced from the original manufacturer or authorized distributors?

All TPS566235RJNT 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 TPS566235RJNT meets industry standards.

7.What is the process for return or replacement of TPS566235RJNT?

All TPS566235RJNT units undergo pre-shipment inspection (PSI). If there is an issue with TPS566235RJNT, 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 TPS566235RJNT part is unused and in its original packaging.

Return procedure for TPS566235RJNT:

1.Submit a request within 90 days.

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

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