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Texas Instruments TPS566231RQFR
- Part No.:
- TPS566231RQFR
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
TPS566231RQFR.pdf
- Description:
- IC REG BUCK ADJ 6A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
TPS566231RQFR from Texas Instruments is a 6-A synchronous step-down DC/DC converter optimized for rugged, space-constrained point-of-load applications. It operates from 3 V to 18 V input, delivers 0.6 V to 7 V output, integrates 20.8 mΩ/10.6 mΩ MOSFETs, 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, industrial PC, and IP camera power rails.
For engineers reviewing the TPS566231RQFR datasheet, TPS566231RQFR pinout, TPS566231RQFR application, or TPS566231RQFR equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world design implications - including soft-start configurability, 98% duty cycle capability, and ULQ™ 50-μA quiescent current enabling long battery life in low-power standby modes.
Technical Context
The TPS566231RQFR implements D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation with ultra-low-ESR ceramic capacitors and eliminating need for external compensation. Its Eco-mode operation transitions seamlessly between CCM and DCM to maintain >85% efficiency at 10 mA load while delivering full 6-A continuous output.
It integrates non-latched OVP (115% trip), UVP (60% trip), OTP (160°C), and valley-current OCP (7.4 A typ), all with hiccup recovery. The 1.5-mm × 2.0-mm HotRod™ QFN-9 package features exposed thermal pad, 44°C/W effective θJA on EVM, and PGND/VIN pin separation to minimize switching noise coupling into feedback path.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 18 V - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Current | 6 A continuous - sustains full rated load at 125°C junction temperature with proper PCB layout. |
| Feedback Reference | 0.6 V ±1% at 25°C - enables precise 1.0 V, 1.2 V, 1.8 V, 3.3 V, or 5.0 V outputs using standard resistor dividers. |
| Switching Frequency | 600 kHz fixed - balances size (small inductor), efficiency, and EMI performance in dense layouts. |
| Quiescent Current | 50 μA in Eco-mode - extends battery runtime in always-on IoT and surveillance systems during standby. |
| Duty Cycle Max | 98% - allows high-VOUT/VIN ratios (e.g., 5 V out from 5.2 V input) with minimal dropout loss. |
| MOSFET RDS(on) | 20.8 mΩ (HS) / 10.6 mΩ (LS) at 25°C - reduces conduction loss and thermal stress at full load. |
Pinout & Package
TPS566231RQFR is housed in a 1.5-mm × 2.0-mm, 9-pin HotRod™ QFN (RQF) package with wettable flanks and exposed thermal pad. Pin 1 is FB; pins 5 and 6 are parallel VIN inputs; pin 4 is PGND; pin 9 is SS (soft-start control).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 2) | Feedback input | Connects to center tap of output voltage divider; senses regulated VOUT with 0.6 V reference. |
| VIN (Pins 5, 6) | Power input | Parallel high-current paths for 3–18 V input; requires local 10-μF ceramic + bulk capacitance. |
| EN (Pin 3) | Enable control | Active-high logic input (1.19 V threshold); internal pullup enables default-on operation when floating. |
| PGND (Pin 4) | Power ground | Switching return node; must be connected to input/output capacitor grounds at single-point star. |
| BST (Pin 7) | Bootstrap supply | Drives high-side gate; requires 0.1-μF X7R ceramic capacitor between BST and SW nodes. |
| SW (Pin 8) | Switch node | Connects to inductor; carries high di/dt; layout critical for EMI and efficiency. |
| SS (Pin 9) | Soft-start control | External capacitor sets ramp time (e.g., 100 nF → ~1.9 ms); disables discharge during startup. |
| VCC (Pin 1) | Internal LDO output | 5.0 V ±5% regulated supply for internal circuitry; bypass with 1-μF ceramic to PGND. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ Control Mode | Enables stable operation with ceramic output caps, zero external compensation, and <10-μs load transient response. |
| Eco-mode (Auto-skip) | Reduces switching frequency under light load to maintain >87% efficiency at 10 mA, extending battery life. |
| Built-in Output Discharge | 114-Ω internal MOSFET actively discharges VOUT during fault, shutdown, or EN deassertion - prevents floating rail. |
| Non-latched Protections | OVP/UVP/OCP/OTP all use hiccup recovery - clears faults automatically after thermal cooldown or input restoration. |
| ULQ™ Quiescent Current | 50 μA typical in active standby - meets stringent energy budget requirements for always-on edge devices. |
Applications
| Digital TV & Set-Top Box | Industrial PC & Factory Automation |
|---|---|
|
Use Scenario: Powering SoC core, DDR memory, and video processing ICs requiring clean, tightly regulated 1.0 V, 1.2 V, or 1.8 V rails. IC Role / Device Role / Timing Role: Primary buck regulator delivering 6-A peak current with sub-100-mV load transient deviation. Use Value: D-CAP3™ control ensures <5-μs recovery from 2-A load steps, minimizing voltage droop that could cause video artifacts or frame drops. |
Use Scenario: Supplying FPGA I/O banks, microcontroller peripherals, and sensor interface circuits in DIN-rail controllers and PLC modules. IC Role / Device Role / Timing Role: Compact, rugged POL converter operating across –40°C to 125°C ambient with integrated thermal protection. Use Value: 98% max duty cycle enables direct 5-V output from 5.2-V backup battery, avoiding cascaded regulation losses. |
| IP Camera & Edge AI Vision | Networking Point-of-Load |
|
Use Scenario: Powering image sensor, ISP, and Wi-Fi/BLE SoCs in battery- or PoE-powered security cameras. IC Role / Device Role / Timing Role: Dual-role converter: high-efficiency Eco-mode for standby (50 μA IQ), full 6-A burst mode for motion-triggered recording. Use Value: ULQ™ quiescent current extends 12-V/2-Ah battery life to >6 months in motion-detection-only mode. |
Use Scenario: Generating 3.3 V or 5 V for switch PHYs, SFP+ modules, and management controllers in 1U rack switches. IC Role / Device Role / Timing Role: High-density POL solution fitting within 2.0-mm height constraint of front-panel module slots. Use Value: 1.5-mm × 2.0-mm HotRod™ QFN reduces board area by 40% vs. comparable 3-mm × 3-mm converters, freeing space for signal routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS566231PQFR | Replaces SS pin with open-drain PG pin; identical Eco-mode, MOSFETs, and D-CAP3™ control. | Required where power-good sequencing or system-level fault reporting is mandatory (e.g., server BMC interfaces). | Select TPS566231PQFR if your design needs hardware reset assertion or FPGA configuration lockstep with stable VOUT. |
| TPS566238RQFR | Operates in forced CCM instead of Eco-mode; same package, pinout, and specs except higher 375-μA IQ and lower light-load efficiency. | Suitable for noise-sensitive analog circuits (e.g., ADC references) needing constant 600-kHz switching and minimal output ripple. | Choose TPS566238RQFR only when strict ripple control outweighs battery-life impact - not a drop-in replacement for Eco-mode use cases. |
Compared with TPS566231RQFR, TPS566231PQFR adds power-good signaling at no cost to efficiency or footprint, while TPS566238RQFR trades 325-μA higher quiescent current for deterministic ripple and fixed-frequency operation - making each alternative optimal only for its specific system-level requirement.
Availability
TPS566231RQFR 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 consistent parametric performance across production batches.
Supply support for TPS566231RQFR 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 industrial-grade reliability.
The TPS56623x product line was designed specifically for compact, high-current point-of-load regulation in space-constrained, thermally demanding applications - emphasizing ease of use, minimal external components, and robust protection across automotive, industrial, and consumer markets.
FAQ
What is the maximum duty cycle supported by the TPS566231RQFR?
The TPS566231RQFR supports up to 98% duty cycle operation, enabling high-output-voltage regulation from low-input sources - for example, generating 5.0 V from a 5.2-V backup battery. This is achieved via adaptive frequency reduction below 600 kHz when VIN/VOUT < 1.6, extending on-time while maintaining stability and thermal safety. The TPS566231RQFR achieves this without external circuitry or mode selection.
Does the TPS566231RQFR require external compensation components?
No, the TPS566231RQFR uses D-CAP3™ control architecture with internal ripple injection and adaptive on-time modulation, eliminating the need for external compensation networks. This simplifies design, reduces BOM count, and ensures stability with both ceramic and polymer output capacitors - verified across 10-μF to 470-μF ranges and ESR values from 0.5 mΩ to 50 mΩ.
How does the soft-start function work on the TPS566231RQFR?
The TPS566231RQFR implements adjustable soft-start via its SS pin (Pin 9): an internal 6.5-μA current source charges an external capacitor to ramp the reference voltage linearly. A 100-nF capacitor yields ~1.9 ms startup time. During this period, output discharge is disabled, and the device enters hiccup mode if overcurrent occurs - ensuring controlled, glitch-free power-up in multi-rail systems.
What protection features are integrated into the TPS566231RQFR?
The TPS566231RQFR integrates non-latched OVP (115% trip), UVP (60% trip), valley-current OCP (7.4 A typ), thermal shutdown (160°C), and UVLO (2.74 V wake-up). All trigger hiccup-mode recovery - cycling on/off until fault clears - preventing latch-up and enabling autonomous recovery in unattended systems like remote sensors or network infrastructure.
Can the TPS566231RQFR operate from a 3.3-V input?
Yes, the TPS566231RQFR operates from 3 V to 18 V input, including 3.3-V rails. At 3.3 V, its VCC pin follows VIN (not regulated to 5 V), and MOSFET RDS(on) increases to 25.8 mΩ (HS) and 13 mΩ (LS), slightly reducing full-load efficiency. The device maintains 6-A output capability and all protections remain fully functional across the entire range.
TPS566231RQFR 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)
TPS566231RQFR FAQ
1.How can I place an order for TPS566231RQFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS566231RQFR 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 TPS566231RQFR reliable?
The price and inventory of TPS566231RQFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS566231RQFR is usually 5 days.
3.What payment methods are accepted for TPS566231RQFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS566231RQFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS566231RQFR?
TPS566231RQFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS566231RQFR 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 TPS566231RQFR?
For technical support, including TPS566231RQFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS566231RQFR requirements.
6.How does Aetrix verify that TPS566231RQFR is sourced from the original manufacturer or authorized distributors?
All TPS566231RQFR 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 TPS566231RQFR meets industry standards.
7.What is the process for return or replacement of TPS566231RQFR?
All TPS566231RQFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS566231RQFR, 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 TPS566231RQFR part is unused and in its original packaging.
Return procedure for TPS566231RQFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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