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Texas Instruments TPS54226RGTT
- Part No.:
- TPS54226RGTT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS54226RGTT.pdf
- Description:
- IC REG BUCK ADJ 2A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:938
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Product details
Overview
TPS54226RGTT from Texas Instruments is a 2-A synchronous step-down DC/DC converter with integrated high-side (160 mΩ) and low-side (110 mΩ) N-channel MOSFETs, D-CAP2™ adaptive on-time control, and Auto-Skip Eco-Mode™ for light-load efficiency. It operates from 4.5 V to 18 V VCC input and supports 0.76 V to 5.5 V programmable output voltage in a thermally enhanced 16-pin QFN package - used in digital TV power supplies and Blu-ray disc players.
For engineers reviewing the TPS54226RGTT datasheet, TPS54226RGTT pinout, TPS54226RGTT application, or TPS54226RGTT equivalent, key selection considerations include its 700-kHz pseudo-constant switching frequency, 10 μA shutdown current, cycle-by-cycle overcurrent protection, power good output, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The TPS54226RGTT implements D-CAP2™ mode control - combining adaptive on-time PWM with internal ripple injection to enable stable operation with ultra-low-ESR ceramic output capacitors and eliminate need for external compensation. Its on-time is inversely proportional to VIN and proportional to VOUT, yielding ~700 kHz switching across input range.
Eco-Mode™ enables seamless transition from PWM to pulse-frequency modulation at light loads, reducing quiescent current to <10 μA while maintaining regulation. Protection features include cycle-by-cycle valley-current limiting, output over/under-voltage detection (±15% thresholds), thermal shutdown at 150°C, and pre-biased soft-start with controlled low-side gate activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports compact point-of-load regulation for SoC/FPGA core rails. |
| Input Voltage Range | 4.5 V to 18 V (VCC); 2 V to 18 V (VIN) - accommodates wide-input industrial and consumer DC bus sources. |
| Output Voltage Range | 0.76 V to 5.5 V - programmable via resistor divider; 0.765 V reference enables precise low-voltage CPU/GPU core supplies. |
| Switching Frequency | ~700 kHz - pseudo-constant frequency set by adaptive on-time; enables predictable EMI filtering and small magnetics. |
| Efficiency at Light Load | >85% at 10 mA (3.3 V out) - enabled by Auto-Skip Eco-Mode™, critical for always-on system standby rails. |
| Shutdown Current | <10 μA - minimizes battery drain in portable or energy-sensitive applications. |
| Thermal Resistance θJB | 18.8 °C/W - achieved via exposed thermal pad soldered to PGND plane; enables 2 A operation without heatsink at TA ≤ 85°C. |
Pinout & Package
TPS54226RGTT uses a 16-pin plastic QFN (RGT) package with 3.5 mm × 3.5 mm footprint and exposed thermal pad. The pad must be soldered to PGND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 16) | Output voltage node | Connects to LC filter output; also serves as on-time adjustment reference for D-CAP2™ control loop. |
| VFB (Pin 1) | Feedback input | Senses output via resistor divider; 0.765 V internal reference sets regulated output voltage. |
| VREG5 (Pin 2) | 5.5 V LDO output | Powers internal circuitry; requires 1 μF ceramic capacitor to GND for stability and noise rejection. |
| SS (Pin 3) | Soft-start control | External capacitor sets ramp time; supports pre-biased startup by controlling low-side FET turn-on sequence. |
| GND (Pin 4) | Signal ground | Reference for analog blocks; must be tied to PGND near IC to minimize noise coupling into feedback path. |
| PG (Pin 5) | Open-drain power good | Asserts high after 1.7× soft-start time when VOUT is within ±10%; requires external pull-up to VREG5 (20–150 kΩ). |
| EN (Pin 6) | Enable input | Active-high logic control; threshold is 1.5 V (min); allows sequencing and system-level power management. |
| PGND1/PGND2 (Pins 7,8) | Power ground returns | Low-side MOSFET source connections and current-sense comparator inputs; must be directly connected to exposed thermal pad. |
| SW1/SW2 (Pins 9,10,11) | Switch nodes | High-side drain / low-side source connection points; require short, low-inductance routing to minimize ringing and EMI. |
| VBST (Pin 12) | Bootstrap supply | Charged via internal diode from VREG5; drives high-side gate; requires 0.1 μF ceramic capacitor to SW1/SW2. |
| VIN (Pins 13,14) | Main power input | Connects to input bulk capacitor; dual pins reduce IR drop and improve thermal performance under 2 A load. |
| VCC (Pin 15) | Control supply input | Provides bias for internal logic and gate drivers; accepts 4.5–18 V; decoupled with 0.1 μF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable regulation with ceramic output capacitors and zero external compensation components - reduces BOM count and layout sensitivity. |
| Auto-Skip Eco-Mode™ | Reduces switching frequency at light loads to maintain >85% efficiency down to 10 mA - extends battery life and lowers no-load power loss. |
| Pre-biased soft-start | Prevents reverse current flow during startup when output is pre-charged; avoids output voltage droop or system reset events. |
| Cycle-by-cycle overcurrent protection | Detects valley current in low-side FET; non-latching shutdown prevents latch-up during transient overload - improves system reliability. |
| Integrated 5.5 V VREG5 LDO | Supplies internal circuitry and bootstrap capacitor; eliminates need for external bias rail - simplifies design and improves start-up robustness. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player |
|---|---|
Use Scenario: Provides 1.2 V/2 A core voltage for MPEG decoder SoC and 3.3 V/1 A I/O rail in slim-profile consumer AV equipment. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise DC rails with fast transient response to handle video decode bursts. Use Value: D-CAP2™ control ensures sub-50 mV output deviation during 1 A load steps; Eco-Mode™ cuts standby power to <15 mW. |
Use Scenario: Powers laser driver, servo controller, and HDMI interface in high-definition optical disc playback systems. IC Role / Device Role / Timing Role: Point-of-load converter generating 1.8 V/2 A for digital signal processor and 5.0 V/1 A for analog front-end. Use Value: Pre-biased soft-start prevents voltage sag during disc spin-up; thermal pad enables full 2 A output in 3.5 mm × 3.5 mm footprint. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Supplies 1.05 V/2 A CPU core and 2.5 V/1.5 A memory interface in cable/fiber gateway devices with fanless enclosure. IC Role / Device Role / Timing Role: High-efficiency main DC/DC converter operating from 12 V DC input; manages dynamic load changes from packet processing bursts. Use Value: 700 kHz switching enables compact 2.2 μH inductor; θJB = 18.8 °C/W allows 2 A operation at 70°C ambient without derating. |
Use Scenario: Delivers 3.3 V/2 A for demodulator, tuner, and conditional access module in multi-tuner STBs with tight thermal constraints. IC Role / Device Role / Timing Role: Secondary buck regulator supporting multiple independent power domains with independent enable and power-good signaling. Use Value: Dual PGND pins and exposed thermal pad ensure low-impedance return path; power good output enables safe system boot 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 |
|---|---|---|---|
| TPS54225RGTT | Same 16-pin QFN package and D-CAP2™ control, but rated for 2.5 A output and higher Rdson (130 mΩ HS / 85 mΩ LS). | Supports higher current loads; slightly lower light-load efficiency due to higher gate drive losses. | Select when ≥2.2 A output capability is required and board layout allows same footprint. |
| MP2307DN-LF-Z | Monolithic 2 A buck with fixed 500 kHz frequency, no Eco-Mode™, and 0.8 V reference; 16-pin SOIC package (larger footprint). | Lacks pre-biased soft-start and power good output; requires external compensation for ceramic capacitors. | Choose for cost-sensitive designs where 500 kHz fixed frequency suffices and soft-start sequencing is not critical. |
Compared with TPS54226RGTT, TPS54225RGTT offers higher current headroom but marginally lower light-load efficiency, while MP2307DN-LF-Z trades advanced features like Eco-Mode™ and D-CAP2™ simplicity for lower unit cost and broader distributor availability.
Availability
TPS54226RGTT is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc players, and networking home terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54226RGTT 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 TPS54226RGTT belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained consumer and industrial applications demanding high efficiency, fast transient response, and minimal external components.
FAQ
What is the maximum output current supported by the TPS54226RGTT?
The TPS54226RGTT is rated for 2 A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Its cycle-by-cycle overcurrent limit triggers at 2.5–4.5 A depending on temperature and layout, but sustained operation above 2 A requires careful thermal management using the exposed thermal pad and adequate copper area.
Does the TPS54226RGTT support pre-biased output startup?
Yes, the TPS54226RGTT includes proprietary pre-biased soft-start circuitry. When the output voltage is already present at startup, the device gradually enables the low-side FET with narrow on-times before transitioning to normal PWM operation - preventing reverse current flow and ensuring smooth, glitch-free regulation without output droop or overshoot.
What type of output capacitors are compatible with the TPS54226RGTT?
The TPS54226RGTT is optimized for ceramic, POSCAP, and SP-CAP output capacitors with ultra-low ESR. Its D-CAP2™ control architecture eliminates the need for ESR-based output ripple and does not require external compensation, enabling stable operation with 22–68 μF X5R/X7R ceramics - unlike traditional voltage-mode controllers that depend on capacitor ESR for phase margin.
How is the switching frequency determined in the TPS54226RGTT?
The TPS54226RGTT uses adaptive on-time control - its switching frequency is not fixed by an internal oscillator but derived from input voltage (VIN), output voltage (VO), and on-time duration. This yields a pseudo-constant ~700 kHz across the input range, with slight variation due to duty cycle changes; actual frequency can be observed in Figure 10 of the datasheet.
What is the purpose of the VREG5 pin on the TPS54226RGTT?
The VREG5 pin on the TPS54226RGTT delivers a regulated 5.5 V output (5.3–5.7 V typical) to power internal control circuitry and charge the bootstrap capacitor. It sources up to 70 mA and requires a 1 μF ceramic capacitor to GND for stability. This integrated LDO eliminates the need for an external bias supply and simplifies system power architecture.
TPS54226RGTT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 16-VFQFN 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):
- 2V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 5.5V
- 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:
- 16-VQFN (3x3)
TPS54226RGTT FAQ
1.How can I place an order for TPS54226RGTT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54226RGTT 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 TPS54226RGTT reliable?
The price and inventory of TPS54226RGTT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54226RGTT is usually 5 days.
3.What payment methods are accepted for TPS54226RGTT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54226RGTT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54226RGTT?
TPS54226RGTT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54226RGTT 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 TPS54226RGTT?
For technical support, including TPS54226RGTT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54226RGTT requirements.
6.How does Aetrix verify that TPS54226RGTT is sourced from the original manufacturer or authorized distributors?
All TPS54226RGTT 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 TPS54226RGTT meets industry standards.
7.What is the process for return or replacement of TPS54226RGTT?
All TPS54226RGTT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54226RGTT, 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 TPS54226RGTT part is unused and in its original packaging.
Return procedure for TPS54226RGTT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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