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Texas Instruments TPS568236RJNR
- Part No.:
- TPS568236RJNR
- Manufacturer:
- Texas Instruments
- Package:
- 12-PowerVFQFN
- Datasheet:
-
TPS568236RJNR.pdf
- Description:
- IC REG BUCK ADJ 8A 12VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,905
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Product details
Overview
TPS568236RJNR from Texas Instruments is an 8-A synchronous buck converter with D-CAP3™ control, operating from 4.5 V to 18 V input and delivering 0.6 V to 5.5 V output. It integrates 22-mΩ high-side and 11-mΩ low-side MOSFETs, supports PSM/FCCM modes, and features 600-kHz switching, ±1% reference accuracy at 25°C, and 84-μA quiescent current-used in point-of-load regulation for server and industrial power systems.
For engineers reviewing the TPS568236RJNR datasheet, TPS568236RJNR pinout, TPS568236RJNR application, or TPS568236RJNR equivalent, key selection considerations include its adaptive on-time D-CAP3 architecture, thermal shutdown (165°C), hiccup-mode OVP/UVP/OC protection, output discharge function, and compatibility with all-MLCC or POSCAP output capacitors in space-constrained POL designs.
Technical Context
The TPS568236RJNR employs D-CAP3™ adaptive on-time control with internal ripple injection, eliminating external compensation while enabling fast transient response and stable operation with ultra-low-ESR ceramic capacitors. Its dual-mode operation-PSM for light-load efficiency and FCCM for fixed-frequency ripple control-is selected via the MODE pin.
Protection architecture includes cycle-by-cycle valley-current OCP (9.5–12.5 A), auto-recover OVP/UVP (117–123% / 55–65% of VREF), non-latched UVLO (4.2–4.42 V VCC threshold), and thermal shutdown with 20°C hysteresis. The integrated 5-V VCC LDO powers internal circuitry and gate drivers, bypassed by a 1-μF capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports common intermediate bus rails (5 V, 12 V, 15 V) without pre-regulation. |
| Output Current | 8 A continuous - sufficient for high-power FPGA core rails or ASIC I/O supplies. |
| Switching Frequency | 600 kHz - balances size (inductor/capacitor), EMI, and efficiency across load range. |
| Quiescent Current | 84 μA - enables ultra-low standby power in always-on industrial or networking systems. |
| Reference Voltage Accuracy | ±1% at 25°C (0.6 V) - ensures tight output regulation for sensitive digital loads. |
| Integrated FETs | 22 mΩ HS / 11 mΩ LS - reduces conduction loss and eliminates external MOSFET layout complexity. |
| Soft-Start Time | 1 ms internal, adjustable externally via SS pin - prevents inrush current during power-up sequencing. |
| Thermal Shutdown | 165°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed enclosures. |
Pinout & Package
TPS568236RJNR uses a thermally enhanced 12-pin HotRod™ QFN package (3.00 mm × 2.00 mm), with exposed thermal pad for efficient PCB heat dissipation in high-current applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies control circuitry; requires local decoupling to PGND for noise immunity and stability. |
| PGND | Power ground | High-current return path for internal FETs; must be connected to thermal pad and low-impedance ground plane. |
| PG | Open-drain power-good indicator | Signals valid output after 500-μs delay; requires external 100-kΩ pullup to VCC for system sequencing. |
| FB | Feedback input | Senses output voltage via resistor divider; regulates to 0.6 V reference with ±1% accuracy. |
| SS | Soft-start control | Accepts external capacitor to extend soft-start beyond 1 ms; critical for multi-rail power sequencing. |
| SW | Switch node | Connects to output inductor; carries high di/dt; requires short, low-inductance routing to minimize ringing. |
| VBST | Bootstrap supply | Charged via bootstrap capacitor between VBST and SW; enables high-side FET gate drive above VIN. |
| VCC | Internal LDO output | 5-V regulated supply for internal logic/gate drivers; must be bypassed with 1-μF ceramic capacitor. |
| AGND | Analog ground | Reference for FB, SS, MODE; connects to PGND at single point near AGND pin to avoid noise coupling. |
| EN | Enable input | Digital enable with 1.31 V turn-on threshold; internal pulldown allows default-disable if left floating. |
| MODE | Operating mode select | Pull >0.8 V for FCCM (fixed frequency); float or pull <0.4 V for PSM (light-load efficiency). |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP3™ control mode | Enables zero-external-compensation design with fast transient response and stable operation using only MLCC or POSCAP output capacitors. |
| Adjustable soft-start | Internal 1-ms ramp plus external capacitor option ensures controlled voltage ramp-up for reliable system boot and rail sequencing. |
| Output discharge function | 160-Ω internal switch actively discharges VOUT during fault conditions (OVP/UVP/TSD), preventing residual voltage hold-up. |
| PSM/FCCM mode selection | Dynamic MODE pin control allows real-time trade-off between light-load efficiency (PSM) and fixed-frequency ripple performance (FCCM). |
| Hiccup-mode OVP/UVP/OC protection | Auto-recover fault handling avoids latch-off shutdown, maintaining system uptime during transient overloads or line disturbances. |
| Thermally enhanced HotRod™ QFN | Low RθJA (72.7°C/W) and exposed thermal pad support 8-A operation in compact 3.0 mm × 2.0 mm footprint without heatsink. |
Applications
| Server Point-of-Load | Industrial PC Power |
|---|---|
Use Scenario: Regulating 12-V intermediate bus to 1.8-V or 3.3-V core/I/O rails for Xeon or ARM-based compute modules. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 8 A with tight DC accuracy and fast load-step response. Use Value: D-CAP3™ control maintains regulation within ±1% under 5-A step transients, eliminating need for external compensation components. | Use Scenario: Powering programmable logic controllers (PLCs) and HMIs requiring robust 5-V or 3.3-V rails in factory automation cabinets. IC Role / Device Role / Timing Role: High-efficiency POL converter with hiccup-mode protection to survive motor drive EMI and voltage surges. Use Value: 84-μA quiescent current extends battery backup runtime; thermal shutdown (165°C) prevents failure in unventilated enclosures. |
| Networking Switch POL | TV/STB Core Supply |
Use Scenario: Generating 1.0-V or 1.2-V core voltage for multi-gigabit Ethernet PHYs and packet processors in enterprise switches. IC Role / Device Role / Timing Role: High-density buck converter supporting FCCM mode to avoid audible noise and maintain low output ripple at light load. Use Value: Fixed 600-kHz switching suppresses ripple in sensitive analog front-ends; MODE pin toggling enables dynamic noise management. | Use Scenario: Delivering 5-V or 1.1-V rails to SoC and memory subsystems in smart TVs and set-top boxes with strict standby power limits. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator operating in PSM mode during deep-sleep states to meet Energy Star requirements. Use Value: 84-μA IQ enables sub-10-mW no-load consumption; output discharge clears residual voltage before wake-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54821RHLR | Same 4.5–18-V input, 8-A rating, but uses voltage-mode control with external compensation; higher IQ (120 μA); larger 4-mm × 4-mm QFN. | Requires external RC network for loop stability; less suitable for all-MLCC designs than D-CAP3™ topology. | Choose when legacy voltage-mode design reuse or tighter EMI filtering is prioritized over layout simplicity. |
| MP2386GJ-Z | Monolithic 8-A buck with 4.5–18-V input, but uses constant-on-time control; 100-μA IQ; no integrated output discharge; 3-mm × 3-mm QFN. | Lacks hiccup-mode recovery and PG signal; limited thermal performance (RθJA = 85°C/W) vs. TPS568236RJNR's 72.7°C/W. | Consider for cost-sensitive consumer applications where full fault recovery and thermal headroom are secondary. |
Compared with TPS54821RHLR and MP2386GJ-Z, the TPS568236RJNR delivers superior integration (no compensation needed), lower quiescent current, built-in output discharge, and better thermal metrics-making it optimal for space- and efficiency-critical POL systems demanding reliability and ease of use.
Availability
TPS568236RJNR is available at Aetrix Electronics and suitable for server point-of-load, industrial PC power, and networking switch applications requiring stable component supply, long-term manufacturability, and automotive-grade reliability validation.
Supply support for TPS568236RJNR 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.
The TPS568236RJNR belongs to TI's D-CAP3™ family of monolithic buck converters, designed specifically for high-current, space-constrained point-of-load applications in datacenter, industrial, and consumer electronics where fast transient response and minimal external components are essential.
FAQ
What is the maximum continuous output current supported by the TPS568236RJNR?
The TPS568236RJNR supports 8 A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating assumes adequate copper area, thermal vias under the exposed pad, and airflow per TI's thermal guidelines. Peak current capability exceeds 11 A due to valley-current OCP threshold, but sustained operation above 8 A requires derating based on ambient temperature and heatsinking.
Does the TPS568236RJNR require external compensation components?
No, the TPS568236RJNR does not require external compensation components. Its D-CAP3™ adaptive on-time control architecture incorporates internal ripple injection and optimized loop dynamics, enabling stable operation with standard MLCC or POSCAP output capacitors without adding resistors or capacitors to the feedback network.
How does the MODE pin affect the operation of the TPS568236RJNR?
The MODE pin selects between two operating modes: pulling it above 0.8 V enables Forced Continuous Conduction Mode (FCCM) for fixed 600-kHz switching and consistent ripple, while floating or pulling it below 0.4 V activates Power Save Mode (PSM) for improved light-load efficiency. The pin can be toggled dynamically during operation without reset.
What protection features are integrated into the TPS568236RJNR?
The TPS568236RJNR integrates cycle-by-cycle overcurrent protection (OCP), auto-recover overvoltage (OVP) and undervoltage (UVP) protection, non-latching UVLO, thermal shutdown (165°C with 20°C hysteresis), and output discharge. These functions operate independently and do not require external circuitry-OVP/UVP thresholds are 117–123% and 55–65% of VREF respectively.
Can the TPS568236RJNR be used with only ceramic output capacitors?
Yes, the TPS568236RJNR is fully compatible with all-MLCC output capacitor configurations. Its D-CAP3™ control mode uses internal ripple injection to synthesize the necessary AC signal for loop stability, eliminating dependency on capacitor ESR-unlike traditional voltage-mode or current-mode controllers that require minimum ESR for phase margin.
TPS568236RJNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-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):
- 5.5V
- Current - Output:
- 8A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-VQFN-HR (3x2)
TPS568236RJNR FAQ
1.How can I place an order for TPS568236RJNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS568236RJNR 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 TPS568236RJNR reliable?
The price and inventory of TPS568236RJNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS568236RJNR is usually 5 days.
3.What payment methods are accepted for TPS568236RJNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS568236RJNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS568236RJNR?
TPS568236RJNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS568236RJNR 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 TPS568236RJNR?
For technical support, including TPS568236RJNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS568236RJNR requirements.
6.How does Aetrix verify that TPS568236RJNR is sourced from the original manufacturer or authorized distributors?
All TPS568236RJNR 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 TPS568236RJNR meets industry standards.
7.What is the process for return or replacement of TPS568236RJNR?
All TPS568236RJNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS568236RJNR, 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 TPS568236RJNR part is unused and in its original packaging.
Return procedure for TPS568236RJNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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