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Texas Instruments TPS566238RQFR
- Part No.:
- TPS566238RQFR
- Manufacturer:
- Texas Instruments
- Package:
- 9-PowerVFQFN
- Datasheet:
-
TPS566238RQFR.pdf
- Description:
- IC REG BUCK ADJ 6A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,763
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Product details
Overview
TPS566238RQFR from Texas Instruments is a 6-A synchronous step-down voltage regulator operating from 3 V to 18 V input, delivering 0.6 V to 7 V output with ±1% reference accuracy at 25°C, 600-kHz fixed switching frequency, and integrated 20.8 mΩ/10.6 mΩ power MOSFETs. It serves as a compact, high-efficiency point-of-load converter in server and industrial embedded power rails.
For engineers reviewing the TPS566238RQFR datasheet, TPS566238RQFR pinout, TPS566238RQFR application, or TPS566238RQFR equivalent, this page delivers verified functional mode (Force CCM), thermal protection behavior (160°C OTP with 25°C hysteresis), soft-start control via SS pin, non-latched OVP/UVP/OCP/OTP protections, and D-CAP3™ control architecture enabling fast transient response without external compensation.
Technical Context
The TPS566238RQFR implements D-CAP3™ adaptive on-time control with internal ripple injection, supporting stable regulation with ultra-low-ESR ceramic capacitors and eliminating need for external loop compensation. Its Force CCM operation maintains continuous inductor current across all load conditions, ensuring low output voltage ripple and predictable 600-kHz switching frequency down to zero load.
It integrates non-latched overvoltage (115% trip), undervoltage (60% trip), overcurrent (7.4 A typical valley limit), and thermal shutdown (160°C) protections with hiccup recovery, plus built-in output discharge via 114-Ω internal FET. The device operates over –40°C to 125°C junction temperature with 98% maximum duty cycle capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 18 V - supports wide-input industrial and networking rails without pre-regulation. |
| Output Current | 6 A continuous - delivers full rated current with thermal derating per SOA curve at 100 LFM airflow. |
| Reference Voltage | 0.6 V ±1% at 25°C - enables precise 1.0 V, 3.3 V, or 5.0 V output setting with standard resistor dividers. |
| Switching Frequency | 600 kHz - fixed frequency simplifies EMI filtering and enables compact magnetics design. |
| MOSFET RDS(on) | 20.8 mΩ (HS) / 10.6 mΩ (LS) at 25°C - minimizes conduction loss and improves full-load efficiency. |
| Soft-Start Control | External SS pin with 6.5 µA charge current - allows adjustable startup time using external capacitor. |
| Protection Features | Non-latched OVP, UVP, OCP, OTP, UVLO - auto-recovery hiccup mode prevents latch-up during faults. |
Pinout & Package
TPS566238RQFR uses a 9-pin 1.5-mm × 2.0-mm HotRod™ QFN (RQFR) package with exposed thermal pad. Pin 1 is FB; pins 5 and 6 are VIN; pin 4 is PGND; pin 7 is BST; pin 8 is SW; pin 9 is SS (soft-start control).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 2) | Feedback input | Connects to resistor divider midpoint; sets output voltage with 0.6 V reference; high-impedance node requiring clean routing to PGND. |
| VIN (Pins 5,6) | Input supply | High-current input path; requires local 10–22 µF ceramic decoupling directly to PGND. |
| EN (Pin 3) | Enable control | Active-high digital input (1.19 V typical turn-on); internal pullup enables default-on operation when floating. |
| PGND (Pin 4) | Power ground | Switching return path; must be connected to PCB thermal pad and isolated from analog ground except at single-point star. |
| BST (Pin 7) | Bootstrap supply | Drives high-side gate; requires 0.1 µF X7R ceramic capacitor between BST and SW for reliable bootstrapping. |
| SW (Pin 8) | Switch node | High dv/dt node connecting to output inductor; layout critical to minimize ringing and EMI. |
| SS (Pin 9) | Soft-start control | Capacitor-connected node; charges at 6.5 µA to set ramp time; determines output voltage rise profile. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Enables fast transient response (<10 µs recovery) and stable operation with ceramic output capacitors-no external compensation required. |
| Force Continuous Conduction Mode (FCCM) | Maintains constant 600-kHz switching and low output ripple across full 0–6 A load range, ideal for noise-sensitive applications. |
| Integrated power MOSFETs | 20.8 mΩ HS / 10.6 mΩ LS RDS(on) reduces conduction loss and eliminates discrete FET selection and layout complexity. |
| Built-in output discharge | 114-Ω internal FET actively discharges VOUT during fault or shutdown-prevents back-powering and ensures safe sequencing. |
| Non-latched hiccup protection | OVP/UVP/OCP/OTP trigger automatic restart after fault clearance-avoids system lockup while preserving reliability. |
Applications
| Server Point-of-Load | Industrial PC Power Rail |
|---|---|
Use Scenario: Regulating 1.0 V core voltage for Intel Xeon or AMD EPYC CPU VRM auxiliary rails. IC Role / Device Role / Timing Role: Primary synchronous buck converter delivering 6 A at 600 kHz with tight DC accuracy and fast load-step response. Use Value: D-CAP3™ control achieves <10 µs transient recovery and ±1% output regulation-meets CPU dynamic voltage scaling requirements. |
Use Scenario: Generating 3.3 V or 5.0 V for FPGA I/O banks and peripheral interfaces in ruggedized IPCs. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC converter operating continuously across –40°C to 85°C ambient. Use Value: 98% max duty cycle supports high VIN/VOUT ratios (e.g., 12 V → 3.3 V), and FCCM mode ensures low ripple under variable loads. |
| Digital TV SoC Core Supply | Factory Automation Controller |
Use Scenario: Powering ARM-based media processor cores in smart TVs and streaming boxes. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck regulator with soft-start control to prevent inrush into large output capacitance. Use Value: Adjustable SS pin enables controlled 1–10 ms startup ramp-eliminates brownout during cold boot of multi-rail systems. |
Use Scenario: Providing stable 5.0 V rail for PLC I/O modules and real-time Ethernet controllers in harsh factory environments. IC Role / Device Role / Timing Role: Industrial-grade buck converter with –40°C to 125°C junction rating and robust hiccup-mode fault handling. Use Value: Non-latched OVP/UVP/OTP protections enable autonomous recovery after line transients or short-circuit events-reducing maintenance downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS566231RQFR | Auto-skip Eco-mode instead of Force CCM; 50 µA quiescent current vs. 375 µA; same pinout and package. | Optimized for battery-backed standby or light-load efficiency; higher output ripple during light load. | Select TPS566231RQFR only if >90% of operating time occurs below 1 A and ripple tolerance permits discontinuous mode. |
| TPS566238PQFR | Adds open-drain PG pin (power-good indicator); identical Force CCM operation and electrical specs. | Required where system-level power sequencing or fault monitoring depends on hardware PG signal. | Choose TPS566238PQFR when power-good assertion is mandatory for host controller reset coordination or safety interlocks. |
Compared with TPS566238RQFR, TPS566231RQFR trades lower light-load efficiency for higher ripple and variable frequency, while TPS566238PQFR adds PG functionality without altering regulation performance-making both viable alternatives depending on system-level sequencing and efficiency priorities.
Availability
TPS566238RQFR is available at Aetrix Electronics and suitable for server point-of-load, industrial PC power rails, and digital TV SoC core supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS566238RQFR 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 and embedded processing technologies, with decades of expertise in high-performance power management ICs.
The TPS56623x family is designed for space-constrained, high-efficiency DC/DC conversion in networking, computing, and industrial equipment-emphasizing ease of use, thermal robustness, and integrated protection.
FAQ
What is the function of the SS pin on the TPS566238RQFR?
The SS pin on the TPS566238RQFR is a soft-start control terminal that accepts an external capacitor to set the output voltage ramp time. When EN goes high, a 6.5 µA internal current source charges the capacitor, linearly increasing the internal reference voltage. This controls inrush current and prevents output overshoot. The TPS566238RQFR does not include a power-good (PG) pin-only SS functionality is implemented on pin 9.
Does the TPS566238RQFR support output voltages below 1.0 V?
Yes, the TPS566238RQFR supports output voltages from 0.6 V to 7.0 V using a resistor divider on the FB pin. With its 0.6 V ±1% reference voltage at 25°C and tight feedback accuracy over temperature (±0.15% from –40°C to 125°C), it reliably regulates 0.8 V, 0.9 V, or 1.0 V outputs common in modern SoC and FPGA core rails.
How does the TPS566238RQFR handle overcurrent conditions?
The TPS566238RQFR uses valley-current sensing to detect overcurrent, triggering non-latched hiccup mode when load exceeds ~7.4 A (typical). During hiccup, the device shuts down for ~256 µs, then attempts restart. If the fault persists, cycling continues until cleared. This protects both the TPS566238RQFR and downstream circuitry without requiring manual reset.
What thermal performance can be expected from the TPS566238RQFR in a typical 4-layer PCB layout?
In a standard 4-layer board with 1-in² 2-oz copper thermal pad connected to internal ground planes, the TPS566238RQFR achieves ~44°C/W effective junction-to-ambient thermal resistance (per TI EVM data). At 6 A output and 12 V input, junction temperature rise is ~120°C above ambient-keeping total TJ within the 125°C max rating only with ≥100 LFM airflow or reduced load.
Is the TPS566238RQFR pin-compatible with other devices in the TPS56623x family?
Yes, the TPS566238RQFR shares identical 9-pin HotRod™ QFN (RQFR) packaging and pinout with TPS566231RQFR, TPS566231PQFR, and TPS566238PQFR. Pin 9 functions as SS on TPS566238RQFR and TPS566231RQFR, while it serves as PG on the 'P' variants-requiring schematic and layout review before substitution.
TPS566238RQFR 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)
TPS566238RQFR FAQ
1.How can I place an order for TPS566238RQFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS566238RQFR 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 TPS566238RQFR reliable?
The price and inventory of TPS566238RQFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS566238RQFR is usually 5 days.
3.What payment methods are accepted for TPS566238RQFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS566238RQFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS566238RQFR?
TPS566238RQFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS566238RQFR 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 TPS566238RQFR?
For technical support, including TPS566238RQFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS566238RQFR requirements.
6.How does Aetrix verify that TPS566238RQFR is sourced from the original manufacturer or authorized distributors?
All TPS566238RQFR 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 TPS566238RQFR meets industry standards.
7.What is the process for return or replacement of TPS566238RQFR?
All TPS566238RQFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS566238RQFR, 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 TPS566238RQFR part is unused and in its original packaging.
Return procedure for TPS566238RQFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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