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Texas Instruments TPS54228DRCR
- Part No.:
- TPS54228DRCR
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54228DRCR.pdf
- Description:
- IC REG BUCK ADJ 2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
TPS54228DRCR from Texas Instruments is a 2-A synchronous step-down DC/DC converter with integrated high-side (155 mΩ) and low-side (108 mΩ) N-channel MOSFETs, operating from 4.5 V to 18 V input and delivering adjustable output voltage from 0.76 V to 7 V at up to 2 A. It employs D-CAP2™ adaptive on-time control for fast transient response in digital TV power supplies and networking terminals.
For engineers reviewing the TPS54228DRCR datasheet, TPS54228DRCR pinout, TPS54228DRCR application, or TPS54228DRCR equivalent, key selection considerations include Eco-Mode™ light-load efficiency, 700-kHz switching frequency, prebiased soft-start capability, cycle-by-cycle overcurrent protection, and compatibility with ceramic output capacitors.
Technical Context
The TPS54228DRCR implements D-CAP2™ control architecture, combining adaptive on-time PWM with internal compensation to eliminate external loop compensation components while maintaining stability with ultra-low-ESR ceramic capacitors. Its one-shot timer sets on-time based on VIN and VOUT, enabling pseudo-fixed 700-kHz operation across input voltage variations.
Eco-Mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) at light loads, reducing switching losses and achieving <10 µA shutdown current. Overcurrent protection uses valley-current sensing on the low-side FET with temperature-compensated voltage monitoring and non-latching 7-cycle fault detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer input rails including 12-V and 5-V derived supplies. |
| Output Current | 2 A continuous - sufficient for powering core logic, DDR memory termination, and SoC I/O rails. |
| Switching Frequency | 700 kHz - enables compact magnetics and EMI filtering while balancing efficiency and thermal performance. |
| High-Side RDS(on) | 165 mΩ - optimized for lower duty-cycle applications (e.g., 1.05 V out from 12 V in), minimizing conduction loss. |
| Low-Side RDS(on) | 108 mΩ - complements high-side FET for efficient synchronous rectification and reduced heat generation. |
| Feedback Reference | 0.765 V ±1.5% - enables precise output regulation and supports common low-voltage rails like 1.05 V and 1.2 V. |
| Shutdown Current | <10 µA - ensures minimal system standby power draw in always-on or battery-backed applications. |
Pinout & Package
The TPS54228DRCR is housed in a 10-pin VSON package (3.00 mm × 3.00 mm) with exposed thermal pad on the bottom side, requiring solder connection to PCB ground plane for thermal management and electrical return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 EN | Enable input | Active-high logic control; internal 220–880 kΩ pull-down enables default disable; must exceed 1.6 V to activate regulator. |
| 2 VFB | Feedback input | Monitors output via resistor divider; 0.765-V reference sets output voltage; ±0.1 µA input bias minimizes divider error. |
| 3 VREG5 | 5.5-V LDO output | Supplies gate drive and internal circuitry; requires 1-µF ceramic capacitor to GND; inactive when EN = low. |
| 4 SS | Soft-start control | Adjustable start-up ramp via external capacitor; 2-µA charge current enables precise timing control and prebiased startup. |
| 5 GND | Signal ground | Reference node for VFB and SS; must be connected at single-point star ground to minimize noise coupling. |
| 6 SW | Switch node | Connection between high- and low-side FETs; drives external inductor; requires low-inductance layout and 0.1-µF bootstrap cap to VBST. |
| 7 VBST | Bootstrap supply | Charged via internal diode from VREG5; supplies high-side gate driver; capacitor to SW ensures proper high-side turn-on. |
| 8–9 VIN | Power input | Dual-input pins reduce trace resistance and improve current sharing; accepts 4.5–18 V with 20-V absolute max rating. |
| 10 Exposed Pad | Thermal & PGND | Must be soldered to PCB ground plane; serves as power ground return for low-side FET and primary thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control | Eliminates need for external compensation components while enabling stable operation with ceramic output capacitors and fast load-step response. |
| Eco-Mode™ Operation | Automatically skips switching cycles at light loads to maintain >85% efficiency down to 10-mA output current without audible noise. |
| Prebiased Soft Start | Prevents reverse current flow during startup into precharged outputs by gradually enabling low-side FET conduction cycle-by-cycle. |
| Cycle-by-Cycle OCP | Monitors low-side FET voltage during conduction to detect overcurrent; resets after fault clearance, supporting robust transient recovery. |
| Integrated VREG5 LDO | Provides dedicated 5.5-V rail for internal logic and gate drive, decoupled from main input and eliminating need for external bias supply. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers SoC core, DDR memory, and video processing ICs in flat-panel TVs with variable input from AC/DC adapter. IC Role / Device Role / Timing Role: Primary point-of-load (POL) buck regulator delivering 1.05 V/2 A to processor cores with tight ripple (<20 mVpp) and fast transient response. Use Value: D-CAP2™ control maintains regulation during burst-mode video decoding transients without external compensation, reducing BOM count. | Use Scenario: Supplies 1.2 V/2 A to Ethernet PHY and switch controller in residential gateways and Wi-Fi routers. IC Role / Device Role / Timing Role: Synchronous step-down converter operating in Eco-Mode™ during idle periods to extend system standby time. Use Value: <10 µA shutdown current and auto-skip light-load operation reduce quiescent power, meeting Energy Star® requirements. |
| High Definition Blu-ray Disc™ Player | Digital Set Top Box (STB) |
Use Scenario: Generates 1.8 V/2 A for MPEG-4 decoder ASIC and HDMI transmitter in Blu-ray players with thermally constrained enclosures. IC Role / Device Role / Timing Role: Compact 3×3-mm VSON buck converter providing regulated rail with integrated FETs and thermal pad for direct PCB heat sinking. Use Value: 43.9°C/W junction-to-ambient thermal resistance enables full 2-A operation without heatsink in ambient temperatures up to 85°C. | Use Scenario: Delivers 3.3 V/2 A to tuner modules, demodulators, and conditional access processors in cable/satellite STBs. IC Role / Device Role / Timing Role: Adjustable-output buck converter using resistor divider to set precise 3.3-V rail with ±1% accuracy over line/load/temperature. Use Value: 0.765-V reference and 1% resistor tolerance support tight output tolerance (±15 mV), ensuring reliable signal integrity in RF front-end circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227DRCR | Same 10-pin VSON package and D-CAP2™ control, but rated for 1.7-A output and higher 180-mΩ high-side RDS(on). | Suitable for lower-current designs where 2-A headroom is unnecessary; slightly lower light-load efficiency due to higher conduction loss. | Select when cost sensitivity outweighs 300-mA output margin and thermal derating is acceptable under peak load. |
| MP2315DJ-LF-Z | Monolithic 2-A buck with 700-kHz fixed frequency, but uses voltage-mode control requiring external compensation and less optimal light-load efficiency. | Better suited for designs already using voltage-mode controllers or needing predictable EMI spectrum; lacks prebiased soft-start and Eco-Mode™. | Choose when deterministic switching frequency is mandatory for EMI compliance and ceramic-capacitor stability is verified via compensation design. |
Compared with TPS54228DRCR, TPS54227DRCR offers identical footprint and control architecture at reduced current rating, while MP2315DJ-LF-Z trades D-CAP2™ simplicity for fixed-frequency predictability-making TPS54228DRCR optimal for space-constrained, low-noise, high-transient applications requiring zero-compensation design.
Availability
TPS54228DRCR is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, high-definition Blu-ray Disc™ players, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54228DRCR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The TPS54228DRCR belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for high-efficiency, low-component-count point-of-load regulation in space-constrained consumer electronics with demanding transient and standby power requirements.
FAQ
What is the maximum recommended output current for the TPS54228DRCR?
The TPS54228DRCR is specified for continuous 2-A output current over the full –40°C to 85°C ambient temperature range when used with appropriate PCB copper area and thermal pad soldering. Derating applies above 85°C ambient or with insufficient thermal management; the device includes thermal shutdown at 165°C junction temperature to prevent damage. The TPS54228DRCR achieves this rating using its 165-mΩ high-side and 108-mΩ low-side MOSFETs in the 3×3-mm VSON package.
Does the TPS54228DRCR require external compensation components?
No, the TPS54228DRCR does not require external compensation components due to its D-CAP2™ adaptive on-time control architecture. This proprietary control scheme embeds internal compensation that stabilizes the feedback loop across varying output capacitor ESR values-including ceramic, POSCAP, and SP-CAP types-without additional resistors or capacitors. The TPS54228DRCR maintains stability and fast transient response solely through its internal circuitry and proper layout of the VFB divider and output filter.
Can the TPS54228DRCR safely start up into a precharged output voltage?
Yes, the TPS54228DRCR supports prebiased soft start. When the output is precharged above the target regulation voltage, the TPS54228DRCR avoids sinking current by initially enabling the low-side FET with narrow, incrementally increasing pulse widths until full synchronous rectification is achieved. This prevents reverse current flow and output voltage droop during startup, protecting downstream circuitry. The TPS54228DRCR implements this behavior automatically without external circuitry or configuration.
What is the purpose of the VREG5 pin on the TPS54228DRCR?
The VREG5 pin on the TPS54228DRCR is an internally generated 5.5-V LDO output used to power the high-side gate driver and internal control circuitry. It eliminates the need for an external bias supply and is active only when the EN pin is high. A 1-µF ceramic capacitor must be placed between VREG5 and GND for stability and noise suppression. The TPS54228DRCR specifies 5.2–5.7 V output with ±100 mV load regulation, ensuring reliable gate drive under all operating conditions.
How does Eco-Mode™ improve light-load efficiency in the TPS54228DRCR?
Eco-Mode™ in the TPS54228DRCR improves light-load efficiency by automatically skipping switching cycles when output current drops below the discontinuous conduction mode threshold. Instead of forcing PWM pulses at low load, the TPS54228DRCR holds the low-side FET on until the output voltage falls to the regulation threshold, reducing switching losses. This enables the TPS54228DRCR to maintain >85% efficiency at 10-mA load while drawing <10 µA in shutdown-critical for always-on consumer devices.
TPS54228DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS54228DRCR FAQ
1.How can I place an order for TPS54228DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54228DRCR 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 TPS54228DRCR reliable?
The price and inventory of TPS54228DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54228DRCR is usually 5 days.
3.What payment methods are accepted for TPS54228DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54228DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54228DRCR?
TPS54228DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54228DRCR 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 TPS54228DRCR?
For technical support, including TPS54228DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54228DRCR requirements.
6.How does Aetrix verify that TPS54228DRCR is sourced from the original manufacturer or authorized distributors?
All TPS54228DRCR 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 TPS54228DRCR meets industry standards.
7.What is the process for return or replacement of TPS54228DRCR?
All TPS54228DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54228DRCR, 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 TPS54228DRCR part is unused and in its original packaging.
Return procedure for TPS54228DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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