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Texas Instruments TPS54228DRCT
- Part No.:
- TPS54228DRCT
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS54228DRCT.pdf
- Description:
- IC REG BUCK ADJ 2A 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,889
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Product details
Overview
TPS54228DRCT from Texas Instruments is a 2-A synchronous step-down DC/DC converter with integrated high- and low-side N-channel MOSFETs, operating in D-CAP2™ adaptive on-time mode for fast transient response. It supports 4.5 V to 18 V input, delivers adjustable 0.76 V to 7 V output, features 700-kHz switching frequency, Eco-Mode™ for light-load efficiency, and is used in digital TV power supplies and STB applications.
For engineers reviewing the TPS54228DRCT datasheet, TPS54228DRCT pinout, TPS54228DRCT application, or TPS54228DRCT equivalent, key selection considerations include its D-CAP2™ control architecture, 155 mΩ/108 mΩ FET RDS(on), thermal shutdown at 165°C, prebiased soft-start capability, and compatibility with ceramic output capacitors.
Technical Context
The TPS54228DRCT implements adaptive on-time D-CAP2™ control-combining constant on-time operation with internal ripple-simulation circuitry to eliminate external compensation and enable stable regulation with ultra-low-ESR ceramic capacitors. Its one-shot timer sets on-time based on VIN and VOUT, yielding pseudo-fixed 700-kHz operation across input voltage range.
It transitions seamlessly between PWM continuous conduction mode (CCM) and Auto-Skip Eco-Mode™ at light loads, reducing quiescent current to <10 µA in shutdown. Overcurrent protection uses cycle-by-cycle valley detection of low-side FET voltage, with non-latching thermal shutdown at 165°C and UVLO tied to VREG5 voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Current | 2 A continuous - sufficient for powering core logic, SoC I/O, or DDR memory subsystems in embedded systems. |
| Switching Frequency | 700 kHz - enables compact magnetics and filtering while balancing EMI and efficiency trade-offs. |
| FET RDS(on) | 155 mΩ (HS), 108 mΩ (LS) - optimized for lower duty-cycle applications (e.g., 1.05 V out from 12 V in) to minimize conduction loss. |
| Feedback Reference | 0.765 V ±1.5% - precise bandgap reference enabling accurate output regulation across temperature and load. |
| Shutdown Current | 5–10 µA - ensures minimal system standby power draw in always-on consumer electronics. |
| Eco-Mode™ Threshold | Auto-enters discontinuous conduction at light load - eliminates reverse inductor current and boosts efficiency below ~200 mA. |
Pinout & Package
TPS54228DRCT is housed in a 10-pin VSON package (3.0 mm × 3.0 mm) with exposed thermal pad (PGND-connected) for enhanced power dissipation. Pin numbering follows top-view orientation with pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; internal 220–880 kΩ pull-down ensures default disable; threshold 0.6 V (low) / 1.6 V (high). |
| 2 - VFB | Feedback input | Monitors output via resistor divider; 0.765 V reference enables precise output programming from 0.76 V to 7 V. |
| 3 - VREG5 | Internal LDO output | 5.5-V regulated supply for gate drive; requires 1-µF ceramic capacitor to GND; inactive when EN = low. |
| 4 - SS | Soft-start control | 2-µA current source charges external capacitor; enables adjustable startup ramp and prevents inrush into prebiased outputs. |
| 5 - GND | Signal ground | Dedicated SGND return for VFB and SS; must be connected at single-point star node to minimize noise coupling. |
| 6 - SW | Switch node | Connection point between high- and low-side FETs; drives external inductor; requires low-ESR bootstrap cap to VBST. |
| 7 - VBST | Bootstrap supply | Charged via internal diode from VREG5; 0.1-µF ceramic cap to SW provides gate drive voltage for high-side FET. |
| 8 - VIN | Main input supply | 4.5–18 V input rail; decoupled by ≥10-µF ceramic + optional 0.1-µF high-frequency cap to reduce switching noise. |
| 9–10 - VIN | Secondary input pins | Parallel VIN connections improve current handling and reduce trace inductance in high-current PCB layouts. |
| Exposed Pad | Thermal & PGND | Must be soldered to solid GND 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 and enables stable operation with ceramic output capacitors down to 22 µF. |
| Adaptive On-Time Architecture | Maintains ~700-kHz switching frequency across input voltage range by dynamically adjusting on-time per cycle using VIN/VOUT ratio. |
| Eco-Mode™ Operation | Reduces light-load quiescent current to <10 µA and improves efficiency at sub-200 mA loads via automatic pulse-skipping. |
| Prebiased Soft Start | Prevents sinking current from precharged output by gradually enabling low-side FET gate drive during startup. |
| Cycle-by-Cycle OCP | Monitors low-side FET voltage during conduction; triggers non-latching current limit after 7 consecutive overcurrent cycles. |
| Integrated VREG5 LDO | Provides dedicated 5.5-V gate drive supply with ±50 mV line/load regulation; eliminates need for external bias rail. |
Applications
| Digital Television Power Supply | High-Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers SoC core, video decoder, and HDMI interface from 12-V main rail. IC Role / Device Role / Timing Role: Primary 1.05-V/2-A buck regulator delivering clean, low-noise power to processor cores. Use Value: D-CAP2™ fast transient response maintains <20-mV output ripple during burst video processing loads. |
Use Scenario: Supplies 1.2-V/2-A to BD-ROM controller and 3.3-V/1-A to servo motor driver IC. IC Role / Device Role / Timing Role: Dual-rail power solution using single TPS54228DRCT per rail with independent feedback dividers. Use Value: Eco-Mode™ extends standby battery life by reducing no-load current to <10 µA during disc idle states. |
| Digital Set-Top Box (STB) | Networking Home Terminal |
Use Scenario: Generates 1.8-V/2-A for QAM demodulator and 5-V/50-mA for USB peripherals. IC Role / Device Role / Timing Role: Main system regulator supporting multiple output voltages via resistor-divider configuration. Use Value: Prebiased soft start prevents output voltage collapse when hot-plugging USB devices into powered STB. |
Use Scenario: Delivers 1.05-V/2-A to Ethernet PHY and 3.3-V/500-mA to Wi-Fi module in compact gateway design. IC Role / Device Role / Timing Role: High-density power stage leveraging 3-mm × 3-mm VSON footprint and thermal pad for thermal management. Use Value: 700-kHz switching allows use of 2.2-µH inductor and 47-µF ceramic caps-reducing board area by >30% vs. 300-kHz alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227DRCT | Same 2-A rating and D-CAP2™ control, but lacks VREG5 LDO output and Eco-Mode™; fixed 700-kHz frequency only. | Requires external 5-V bias for gate drive; less suitable for ultra-low-power standby modes. | Select when VREG5 is not needed and cost reduction is prioritized over light-load efficiency. |
| MP2307DN-LF-Z | 2-A synchronous buck with 4.5–28-V input, but uses voltage-mode PWM control requiring external compensation; no Eco-Mode™. | Higher minimum input voltage (4.5 V) matches TPS54228DRCT, but slower transient response and higher BOM count. | Choose where TI ecosystem integration is not required and design flexibility with external loop tuning is preferred. |
Compared with TPS54228DRCT, TPS54227DRCT omits VREG5 and Eco-Mode™-simplifying design but sacrificing light-load efficiency and self-contained gate drive. MP2307DN-LF-Z offers wider input range but demands compensation network design and delivers inferior transient performance without D-CAP2™.
Availability
TPS54228DRCT is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray player designs, and networking home terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54228DRCT 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 technologies, with decades of expertise in high-efficiency DC/DC conversion.
The TPS54228DRCT belongs to TI's D-CAP2™ synchronous buck converter product line, engineered for consumer and industrial applications demanding fast transient response, minimal external components, and robust light-load efficiency without sacrificing thermal performance.
FAQ
What is the maximum output current capability of the TPS54228DRCT?
The TPS54228DRCT is rated for continuous 2-A output current under recommended operating conditions (–40°C to 85°C ambient, proper layout, and thermal management). Its current limit threshold is 2.5–4.7 A depending on package and inductor value, providing headroom for peak loads while maintaining safe thermal operation in the 3-mm × 3-mm VSON package.
Does the TPS54228DRCT support prebiased output startup?
Yes, the TPS54228DRCT includes proprietary prebiased soft-start circuitry. When the output is already charged before enable, the device gradually ramps up low-side FET conduction to avoid sinking current from the precharged rail-ensuring smooth, controlled startup without output voltage collapse or inrush stress on downstream components.
What package type is used for the TPS54228DRCT?
The TPS54228DRCT uses a 10-pin VSON (DRC) package measuring 3.0 mm × 3.0 mm with an exposed thermal pad. This thermally enhanced package is distinct from the 8-pin SOIC and HSOP variants and requires PCB land pattern compliance with TI's SLVSAU1E datasheet mechanical drawings for optimal thermal performance and reliability.
Can the TPS54228DRCT operate without an external compensation network?
Yes, the TPS54228DRCT uses D-CAP2™ adaptive on-time control, which embeds internal compensation and eliminates the need for external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, and ensures stability with ceramic output capacitors as low as 22 µF-verified across all operating conditions in the official datasheet.
What is the purpose of the VREG5 pin on the TPS54228DRCT?
The VREG5 pin on the TPS54228DRCT provides a regulated 5.5-V output used internally to power the high-side gate driver. It can also supply external circuitry up to 10 mA. A 1-µF ceramic capacitor must be placed between VREG5 and GND; the output shuts down automatically when EN is low, eliminating need for external enable sequencing.
TPS54228DRCT 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)
TPS54228DRCT FAQ
1.How can I place an order for TPS54228DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54228DRCT 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 TPS54228DRCT reliable?
The price and inventory of TPS54228DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54228DRCT is usually 5 days.
3.What payment methods are accepted for TPS54228DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54228DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54228DRCT?
TPS54228DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54228DRCT 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 TPS54228DRCT?
For technical support, including TPS54228DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54228DRCT requirements.
6.How does Aetrix verify that TPS54228DRCT is sourced from the original manufacturer or authorized distributors?
All TPS54228DRCT 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 TPS54228DRCT meets industry standards.
7.What is the process for return or replacement of TPS54228DRCT?
All TPS54228DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54228DRCT, 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 TPS54228DRCT part is unused and in its original packaging.
Return procedure for TPS54228DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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