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Texas Instruments TPS566235RJNR
- Part No.:
- TPS566235RJNR
- Manufacturer:
- Texas Instruments
- Package:
- 13-PowerVFQFN
- Datasheet:
-
TPS566235RJNR.pdf
- Description:
- IC REG BUCK ADJ 6A 13VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,059
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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, validated MODE pin configuration options (Eco-Mode™/OOA/FCCM), confirmed thermal limits (–40°C to 125°C), and real-world efficiency curves across 1.05 V, 3.3 V, and 5 V output configurations.
Technical Context
The TPS566235 employs D-CAP3™ adaptive on-time control with internal ripple injection, enabling stable regulation with ultra-low-ESR ceramic or polymer output capacitors without external compensation. Its valley-current overcurrent protection monitors low-side FET RDS(on) during off-time for cycle-by-cycle current limiting.
Three light-load operation modes - Eco-Mode™ (discontinuous conduction), Out-Of-Audio™ (≥25 kHz minimum switching frequency), and Forced CCM (fixed 600 kHz) - are selected via resistor-biased MODE pin voltage (0–0.3 V, 0.3–1.2 V, or >1.2 V), with non-latching protections for OVP (125% VFB trip), UVP (60% VFB trip), OTP (150°C), and UVLO (4.4 V wake-up).
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. |
| Output Current | 6 A continuous - enabled by integrated 25-mΩ/12-mΩ MOSFETs and 3.0 mm × 2.0 mm HotRod™ VQFN thermal design. |
| Reference Voltage | 600 mV ±1% at 25°C - sets output voltage via external resistor divider; enables 0.6 V to 7 V programmable range. |
| Switching Frequency | 600 kHz fixed - balances size (smaller inductor/capacitor) and efficiency; FCCM mode maintains constancy across load. |
| Quiescent Current | 108 µA - minimizes standby power loss in always-on embedded systems. |
| Soft Start Time | 1 ms internal - prevents output overshoot and inrush current during power-up. |
| Power Good Threshold | 90–110% of VFB - provides reliable rail validation with 160 µs delay from fault clearance to assertion. |
| Thermal Range | –40°C to 125°C junction - qualified for industrial and enterprise storage environments. |
Pinout & Package
TPS566235 is housed in a 3.0-mm × 2.0-mm, 13-pin HotRod™ VQFN (RJN) package with exposed thermal pad for enhanced PCB heat dissipation and low-inductance power loop routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply for control circuitry | Connects to 4.5–18 V input rail; decoupled to PGND with local ceramic capacitor. |
| PGND (Pins 2,3,4,6) | Power ground return | Low-impedance path for high di/dt switch node current; must be connected directly to thermal pad. |
| EN | Enable control input | Digital logic input; internal pull-down disables converter if left floating; threshold 1.32 V typical. |
| MODE | Light-load mode selection | Biased with resistor to AGND or tied to VCC to select Eco-Mode™, OOA, or FCCM operation. |
| SW | Switching node | Connects to output inductor and bootstrap capacitor; carries high dv/dt and peak currents. |
| BST | Bootstrap supply | Supplies gate drive for high-side FET; requires 0.1 µF capacitor between BST and SW. |
| VCC | Internal LDO output | 4.83 V regulated supply for controller; decoupled with ≥1 µF ceramic capacitor near pin. |
| AGND | Analog ground reference | Separate ground for feedback and sensing circuits; routed with short trace to minimize noise coupling. |
| FB | Feedback voltage sense | Monitors output via resistor divider; 600 mV reference sets VOUT = 0.6 V × (1 + R1/R2). |
| PG | Open-drain power good | Asserts low during soft-start, OVP/UVP/OTP, or FB out-of-window; requires external 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. |
| Out-Of-Audio™ (OOA) mode | Maintains minimum 25 kHz switching frequency under light load to eliminate audible coil/capacitor noise in surveillance and STB applications. |
| Pre-biased start-up support | Prevents reverse current flow into pre-charged output rails - critical for hot-swap and multi-rail sequencing systems. |
| Cycle-by-cycle valley overcurrent protection | Detects low-side FET VDS during off-time for accurate, temperature-compensated current limiting without sense resistors. |
| Non-latching fault protection | Auto-recovery from OVP (125% VFB), UVP (60% VFB), OTP (150°C), and UVLO (4.4 V) without requiring EN toggle or power cycle. |
Applications
| Server and Enterprise SSD | Surveillance Systems |
|---|---|
|
Use Scenario: Core 1.05 V or 1.8 V power rail for NVMe SSD controllers and DRAM buffers in rack-mounted storage units. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 6 A with tight transient response to handle burst I/O loads. Use Value: D-CAP3™ control ensures <5% output deviation during 4-A step load transients; 600-kHz switching allows compact 1.5-µH inductors. |
Use Scenario: Powering image signal processors (ISP) and AI inference accelerators in IP cameras with ambient temperature up to 70°C. IC Role / Device Role / Timing Role: Main 3.3 V or 5 V point-of-load converter supporting Eco-Mode™ for low-power night-mode operation. Use Value: 108 µA quiescent current extends battery backup runtime; OOA mode eliminates audible noise from ceramic caps during motion detection. |
| DTV and Set-Top Boxes | Distributed Power Systems |
|
Use Scenario: Generating 1.2 V CPU core and 1.05 V GPU rails in consumer-grade digital TV platforms with strict EMI requirements. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating in FCCM mode to maintain consistent 600-kHz switching and predictable EMI profile. Use Value: Integrated 25-mΩ/12-mΩ FETs achieve >90% efficiency at 3 A/1.2 V; HotRod™ package reduces parasitic inductance for cleaner switching edges. |
Use Scenario: Secondary 5 V or 3.3 V distribution rail in modular industrial PLCs with multiple isolated DC/DC stages. IC Role / Device Role / Timing Role: Robust POL regulator with power good signaling for system-level rail sequencing and fault monitoring. Use Value: PG pin provides deterministic 160 µs delay for host MCU to detect undervoltage before initiating safe shutdown sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS566231RJNR | Same 3.0 mm × 2.0 mm VQFN package and D-CAP3™ control, but rated for 4 A output current and 12-mΩ/7-mΩ FETs. | Suitable for lower-current applications where thermal margin or BOM cost reduction is prioritized over 6-A capability. | Select when full 6-A headroom is unnecessary and board space or efficiency at ≤3 A is more critical. |
| MP2451DT-LF-Z | Monolithic 6-A buck with 4.5–18 V input, but uses current-mode control, lacks PG pin, and has no MODE-selectable light-load modes. | Used in cost-sensitive industrial controls where audio noise and precise rail sequencing are not required. | Choose only if D-CAP3™ transient performance and OOA/Eco-Mode™ flexibility are not needed. |
Compared with TPS566235, TPS566231RJNR offers identical footprint and control architecture at reduced current rating, while MP2451DT-LF-Z trades advanced light-load features and power-good signaling for lower unit cost and simpler layout - neither is pin-compatible, but both serve overlapping mid-power POL use cases.
Availability
TPS566235 is available at Aetrix Electronics and suitable for server SSD, surveillance camera, and DTV power supply designs requiring stable component supply, long-term lifecycle assurance, and TI-qualified production lots.
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™ synchronous buck converter product line, designed specifically for high-density, low-component-count power solutions in enterprise storage, networking, and intelligent video systems.
FAQ
What is the maximum output current supported by the TPS566235?
The TPS566235 supports 6-A continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Its integrated 25-mΩ high-side and 12-mΩ low-side MOSFETs, combined with the 3.0 mm × 2.0 mm HotRod™ VQFN package, enable this rating without external power devices. Derating applies above 85°C ambient or with insufficient copper area.
How does the MODE pin configure light-load behavior in the TPS566235?
The MODE pin on the TPS566235 selects among three light-load operating modes: Eco-Mode™ (0–0.3 V), Out-Of-Audio™ (0.3–1.2 V), or Forced CCM (>1.2 V), using either a resistor to AGND or direct connection to VCC. The internal 5-µA current source creates a voltage drop across the resistor, and the device latches the mode at startup - requiring VIN power cycle or EN toggle to change.
Does the TPS566235 support pre-biased output start-up?
Yes, the TPS566235 supports pre-biased start-up: it disables both high-side and low-side FETs until the internal soft-start reference exceeds the existing output voltage sensed at the FB pin. This prevents reverse current flow into a pre-charged rail - essential for hot-swap systems and multi-rail power sequencing where downstream regulators may already be active.
What protections are implemented in the TPS566235, and are they latching?
The TPS566235 implements non-latching protections for overvoltage (OVP at 125% VFB), undervoltage (UVP at 60% VFB), overtemperature (OTP at 150°C), overcurrent (valley-current limit), and input UVLO (4.4 V wake-up). All faults auto-clear once the condition resolves - no EN toggle or power cycle is required, enabling robust operation in transient-heavy environments.
Can the TPS566235 operate with ceramic output capacitors?
Yes, the TPS566235 is explicitly designed for ceramic output capacitors, including ultra-low-ESR MLCCs. Its D-CAP3™ control includes internal ripple injection that emulates inductor ripple voltage, eliminating the need for external RC networks or specialized capacitors - simplifying design and reducing BOM count while maintaining stability.
TPS566235RJNR 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)
TPS566235RJNR FAQ
1.How can I place an order for TPS566235RJNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS566235RJNR 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 TPS566235RJNR reliable?
The price and inventory of TPS566235RJNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS566235RJNR is usually 5 days.
3.What payment methods are accepted for TPS566235RJNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS566235RJNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS566235RJNR?
TPS566235RJNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS566235RJNR 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 TPS566235RJNR?
For technical support, including TPS566235RJNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS566235RJNR requirements.
6.How does Aetrix verify that TPS566235RJNR is sourced from the original manufacturer or authorized distributors?
All TPS566235RJNR 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 TPS566235RJNR meets industry standards.
7.What is the process for return or replacement of TPS566235RJNR?
All TPS566235RJNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS566235RJNR, 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 TPS566235RJNR part is unused and in its original packaging.
Return procedure for TPS566235RJNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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