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Texas Instruments TPS566231PRQFR
- Part No.:
- TPS566231PRQFR
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
TPS566231PRQFR.pdf
- Description:
- IC REG BUCK ADJ 6A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:14,787
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Product details
Overview
TPS566231PRQFR from Texas Instruments is a 6-A synchronous step-down voltage regulator in a 1.5-mm × 2.0-mm HotRod™ QFN-9 package, operating from 3-V to 18-V input and delivering 0.6-V to 7-V output with ±1% reference accuracy at 25°C. It integrates high- and low-side MOSFETs (RDS(on) = 20.8 mΩ / 10.6 mΩ), uses D-CAP3™ control for fast transient response without external compensation, and supports auto-skip (Eco-mode) for high light-load efficiency in digital TV and industrial PC power rails.
For engineers reviewing the TPS566231PRQFR datasheet, TPS566231PRQFR pinout, TPS566231PRQFR application, or TPS566231PRQFR equivalent, key selection criteria include its 600-kHz fixed switching frequency, non-latched OCP/OVP/UVLO/OTP protections, built-in output discharge, 98% max duty cycle, and soft-start adjustability via SS pin - all critical for compact, rugged point-of-load designs requiring stable 6-A delivery under dynamic load conditions.
Technical Context
The TPS566231PRQFR implements D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation with ultra-low-ESR ceramic or polymer capacitors and eliminating need for external loop compensation. Its Eco-mode operation transitions seamlessly between CCM and DCM to maintain >90% efficiency down to 1 mA load while preserving 0.6-V ±1% feedback accuracy across –40°C to 125°C.
It features a dedicated SS pin for programmable soft-start (via external capacitor), non-latched hiccup-mode protection for overcurrent (6.1–8.9 A valley limit), overvoltage (110–120% trip), undervoltage (55–65% trip), and thermal shutdown (160°C), plus integrated 114-Ω output discharge MOSFET activated during fault or disable events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 18 V - supports wide-input industrial and consumer DC supplies including 5-V, 12-V, and 15-V rails. |
| Output Current | 6 A continuous - delivers full rated current without derating at 25°C ambient with proper PCB layout and airflow. |
| Feedback Reference | 0.6 V ±1% at 25°C - enables precise 0.6-V to 7-V output setting with <±2% total output tolerance over temp/load. |
| Switching Frequency | 600 kHz - fixed frequency enables predictable EMI filtering and inductor sizing; load-regulated within ±10%. |
| MOSFET RDS(on) | 20.8 mΩ (HS) / 10.6 mΩ (LS) at 25°C - minimizes conduction loss; HS RDS(on) rises to 25.8 mΩ at VIN = 3 V. |
| Quiescent Current | 50 µA typical at no load - enables multi-day battery runtime in always-on standby applications. |
| Duty Cycle Max | 98% - supports high-VIN-to-low-VOUT conversion (e.g., 12 V → 1.2 V) with minimal dropout risk. |
| Operating Temp | –40°C to 125°C junction - qualified for industrial and embedded environments with no derating up to 125°C TJ. |
Pinout & Package
TPS566231PRQFR is housed in a thermally enhanced 9-pin HotRod™ QFN (RQFR) package measuring 1.5 mm × 2.0 mm with exposed thermal pad. The package uses copper leadframe construction for low-inductance switching node routing and improved thermal resistance (RθJA = 89.6°C/W, RθJB = 25°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 5,6) | Input power supply | Dual parallel input pins reduce trace inductance and IR drop; connect directly to bulk and high-frequency input caps at PGND star point. |
| PGND (Pin 4) | Power ground return | Primary return path for high di/dt switch currents; must be connected to PCB thermal pad and decoupling caps with shortest possible path. |
| SW (Pin 8) | Switch node | Connects to inductor; high dv/dt node requiring tight layout; drives both MOSFETs and BST capacitor. |
| BST (Pin 7) | Bootstrap supply | Supplies gate drive for high-side FET; requires 0.1-μF X7R ceramic cap between BST and SW with minimal loop area. |
| VCC (Pin 1) | Internal LDO output | 5-V regulated supply for control circuitry; bypass with 1-μF capacitor; tracks VIN if VIN < 5 V. |
| FB (Pin 2) | Feedback input | High-impedance input sensing resistor divider midpoint; route away from noisy nodes; tie to PGND at single point. |
| EN (Pin 3) | Enable control | Logic-level input (1.13–1.25 V threshold); internal pullup enables device by default when floating. |
| SS (Pin 9) | Soft-start control | Capacitor-programmable ramp; ISS = 6.5 μA charges external CSS to set TSS per TSS ≈ 1.4 × CSS × VREF / ISS. |
| NC | No connect | No internal connection; leave unconnected or tie to PGND per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Enables stable operation with zero external compensation components and compatibility with MLCC, POSCAP, and SP-CAP output capacitors. |
| Eco-mode (auto-skip) | Reduces switching frequency under light load to maintain >85% efficiency at 10-mA output, extending battery life in standby systems. |
| Integrated MOSFETs | Eliminates external FETs and drivers; 20.8 mΩ/10.6 mΩ RDS(on) pair achieves >92% peak efficiency at 12 VIN/1 VOUT. |
| Non-latched hiccup protection | Auto-recovery from OCP, OVP, UVP, and OTP faults without manual reset - ensures robustness in unattended industrial deployments. |
| Built-in output discharge | 114-Ω internal MOSFET actively discharges VOUT during disable or fault, preventing hold-up voltage that could damage downstream logic. |
| 98% max duty cycle | Supports high-ratio buck conversion (e.g., 12 V → 1.2 V) with minimal dropout margin, reducing need for pre-regulation stages. |
Applications
| Digital TV & Set-Top Box | Industrial PC & Factory Automation |
|---|---|
|
Use Scenario: Powering SoC core voltage (1.0 V/3.3 V) and DDR memory rails in compact, thermally constrained consumer enclosures. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 6-A peak current with fast load-step response (<5 µs) to handle video decode bursts. Use Value: D-CAP3™ control ensures <1% output deviation during 0–6-A 10-A/µs transients without external compensation parts. |
Use Scenario: Supplying FPGA I/O banks and microcontroller peripherals in DIN-rail mounted PLCs with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability buck converter operating continuously at –40°C to 85°C ambient with hiccup-mode fault recovery. Use Value: 125°C max junction rating and non-latched protections enable uninterrupted operation during brownouts or short-circuits. |
| Server Point-of-Load | IP Camera & Edge AI Sensor |
|
Use Scenario: Generating 1.8-V or 3.3-V auxiliary rails for NICs, SATA controllers, and fan controllers in 1U rack servers. IC Role / Device Role / Timing Role: Secondary regulator supporting hot-swap and dynamic voltage scaling with precise 0.6-V reference. Use Value: ±1% VFB accuracy and 600-kHz switching allow tight regulation margins required by PCIe Gen4 compliance. |
Use Scenario: Powering image sensor interfaces and low-power AI accelerators in battery-backed outdoor surveillance cameras. IC Role / Device Role / Timing Role: Ultra-low-IQ (50 µA) buck converter enabling multi-week battery life in always-on motion-detection mode. Use Value: Eco-mode extends runtime at 1–10 mA loads while maintaining 0.6-V output accuracy across –40°C to 70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS566231PQRFR | Same silicon, but Pin 9 = PG (open-drain power-good) instead of SS; 1.9-ms internal soft-start vs adjustable. | Required where system-level power sequencing or fault monitoring is needed; not suitable for adjustable soft-start designs. | Select TPS566231PQRFR only if PG signal is mandatory and SS adjustment is unnecessary. |
| TPS566238PRQFR | Same package and pinout, but operates in forced continuous conduction mode (FCCM); higher light-load ripple, lower efficiency below 1 A. | Preferred for noise-sensitive analog circuits needing constant 600-kHz switching and minimal output voltage ripple at all loads. | Choose TPS566238PRQFR when ripple performance outweighs light-load efficiency; avoid for battery-powered standby use. |
Compared with TPS566231PRQFR, TPS566231PQRFR adds power-good signaling at the cost of losing soft-start flexibility, while TPS566238PRQFR trades Eco-mode efficiency for FCCM's ripple stability - making each variant optimal for distinct system-level timing, sequencing, and noise requirements.
Availability
TPS566231PRQFR is available at Aetrix Electronics and suitable for digital TV, industrial PC, and IP camera applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production programs.
Supply support for TPS566231PRQFR 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 TPS56623x family is designed specifically for space-constrained, high-current point-of-load applications in consumer, industrial, and networking equipment - emphasizing ease of design, thermal robustness, and ultra-low quiescent current for always-on systems.
FAQ
What is the recommended input capacitor configuration for TPS566231PRQFR?
TI recommends using parallel input capacitors: one 10-μF X5R/X7R ceramic (for high-frequency decoupling) and one 47-μF low-ESR tantalum or polymer capacitor (for bulk energy storage), placed as close as possible to VIN and PGND pins. This combination maintains stable 600-kHz switching and suppresses input voltage ripple under 6-A load steps. The TPS566231PRQFR datasheet specifies ≤100 mVPP input ripple at full load with this configuration.
Does TPS566231PRQFR require external compensation components?
No, TPS566231PRQFR does not require external compensation components due to its integrated D-CAP3™ control architecture. The internal ripple injection circuit and adaptive on-time modulation provide inherent stability with ceramic, POSCAP, or SP-CAP output capacitors. External compensation is neither supported nor necessary - simplifying layout and reducing BOM count versus traditional voltage-mode or current-mode controllers.
How is soft-start time adjusted on TPS566231PRQFR?
Soft-start time on TPS566231PRQFR is adjusted by connecting an external capacitor (CSS) between Pin 9 (SS) and PGND. With ISS = 6.5 μA and VREF = 0.6 V, TSS ≈ 1.4 × CSS × 0.6 V / 6.5 μA. For example, a 100-nF capacitor yields ~13 ms soft-start. The TPS566231PRQFR internal soft-start is disabled when CSS > 1 nF, ensuring full external control over ramp rate and inrush limiting.
What protection features are implemented in TPS566231PRQFR?
TPS566231PRQFR implements non-latched hiccup-mode protections for overcurrent (valley-current detection, 6.1–8.9 A), overvoltage (110–120% VOUT), undervoltage (55–65% VOUT), thermal shutdown (160°C), and input UVLO (2.62–2.86 V). All protections auto-recover after fault removal, and output discharge activates during any fault or EN deassertion via a 114-Ω internal MOSFET.
Can TPS566231PRQFR operate with a 3-V input supply?
Yes, TPS566231PRQFR is fully specified for 3-V input operation. At VIN = 3 V, VCC follows VIN (not regulated to 5 V), high-side RDS(on) increases to 25.8 mΩ, and minimum on-time extends to maintain regulation. The device sustains 6-A output down to 3 V input with appropriate inductor selection and thermal management, as verified in TI's SLUSDQ7B characterization data.
TPS566231PRQFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-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):
- 3V
- 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:
- 9-VQFN-HR (1.5x2)
TPS566231PRQFR FAQ
1.How can I place an order for TPS566231PRQFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS566231PRQFR 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 TPS566231PRQFR reliable?
The price and inventory of TPS566231PRQFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS566231PRQFR is usually 5 days.
3.What payment methods are accepted for TPS566231PRQFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS566231PRQFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS566231PRQFR?
TPS566231PRQFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS566231PRQFR 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 TPS566231PRQFR?
For technical support, including TPS566231PRQFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS566231PRQFR requirements.
6.How does Aetrix verify that TPS566231PRQFR is sourced from the original manufacturer or authorized distributors?
All TPS566231PRQFR 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 TPS566231PRQFR meets industry standards.
7.What is the process for return or replacement of TPS566231PRQFR?
All TPS566231PRQFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS566231PRQFR, 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 TPS566231PRQFR part is unused and in its original packaging.
Return procedure for TPS566231PRQFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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