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Texas Instruments TPS54226RGTR
- Part No.:
- TPS54226RGTR
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TPS54226RGTR.pdf
- Description:
- IC REG BUCK ADJ 2A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
TPS54226RGTR 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 delivers adjustable output voltage from 0.76 V to 5.5 V at up to 2 A, targeting digital TV power supplies and Blu-ray disc players.
For engineers reviewing the TPS54226RGTR datasheet, TPS54226RGTR pinout, TPS54226RGTR application, or TPS54226RGTR equivalent, key selection considerations include its 700-kHz pseudo-fixed switching frequency, 16-pin QFN (RGT) thermal-pad package, cycle-by-cycle overcurrent protection, power good output, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The TPS54226RGTR implements D-CAP2™ mode control - an adaptive on-time architecture that eliminates need for external loop compensation while enabling fast transient response. Its internal ramp-simulated ripple allows stable operation with ultra-low-ESR ceramic capacitors.
It supports seamless transition between PWM mode (heavy load) and Auto-Skip Eco-Mode™ (light load), achieving <10 µA shutdown current and high efficiency across 10 µA–2 A output range. Protection features include cycle-by-cycle overcurrent detection via SW node voltage sensing, output over/under-voltage lockout (115%/70% thresholds), thermal shutdown at 150°C, and pre-biased soft-start.
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) - enables single-rail operation from 5 V, 12 V, or wide-input industrial supplies. |
| 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 supply. |
| Switching Frequency | ~700 kHz - pseudo-constant frequency set by VIN/VO ratio; reduces EMI filter size vs lower-frequency buck converters. |
| MOSFET RDS(on) | 160 mΩ (HS), 110 mΩ (LS) - low conduction loss enables >90% efficiency at 1.8 V/2 A with proper layout and thermal management. |
| Protection Features | Cycle-by-cycle OCP, output OVP/UVP (115%/70%), thermal shutdown (150°C), UVLO (3.55–4.05 V on VREG5) - ensures robust operation in unregulated environments. |
| Soft Start | Adjustable via external capacitor on SS pin - prevents inrush current; supports pre-biased output startup without sinking current. |
Pinout & Package
TPS54226RGTR uses a 16-pin QFN package (RGT) with exposed thermal pad (PowerPAD™), optimized for high-power density and thermal performance. The package measures 3 mm × 4.5 mm × 0.9 mm and requires soldering of the thermal pad to PGND for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 16) | Output voltage sense and feedback reference | Connects directly to output rail; used for on-time adjustment and feedback path - must be Kelvin-connected to minimize noise sensitivity. |
| VFB (Pin 1) | Feedback input | Monitors divided output voltage; internal 0.765 V reference sets regulation point - requires 1% resistors for accuracy. |
| VREG5 (Pin 2) | 5.5 V internal LDO output | Powers internal circuitry and provides bias for PG pull-up; requires 1 µF ceramic capacitor to GND for stability. |
| SS (Pin 3) | Soft-start control | Charged by 2 µA internal current source; external capacitor sets ramp time - enables controlled startup and pre-biased operation. |
| GND (Pin 4) | Signal ground reference | Reference for analog circuits (VFB, SS, PG); must be isolated from high-current PGND paths to avoid noise coupling. |
| PG (Pin 5) | Open-drain power good indicator | Asserts high after 1.7× soft-start time when VOUT is within ±10%; requires external 20–150 kΩ pull-up to VREG5. |
| EN (Pin 6) | Enable input | Active-high logic control (1.5 V threshold); pulls device into shutdown (<10 µA) when low - supports sequencing and standby modes. |
| PGND1/PGND2 (Pins 7, 8) | Power ground returns | Low-side MOSFET source connections and current-sense reference points - must be tied directly to thermal pad and VIN bulk capacitor ground. |
| SW1/SW2 (Pins 9, 10, 11) | Switch node terminals | Connect to external inductor; SW1/SW2 are paralleled internally - high di/dt nodes requiring minimal trace area and tight layout. |
| VBST (Pin 12) | Bootstrap supply for high-side gate driver | Requires 0.1 µF ceramic capacitor to SW1/SW2 - enables full enhancement of HS FET during each cycle. |
| VIN (Pins 13, 14) | Main power input | High-current path to HS FET drain; accepts 2–18 V input - demands low-ESR input capacitance near pins. |
| VCC (Pin 15) | Control circuit supply | Accepts 4.5–18 V; powers internal logic, gate drivers, and reference - decoupled by local 0.1 µF capacitor. |
| Exposed Thermal Pad | Thermal and electrical ground | Must be soldered to PGND plane with ≥6 thermal vias - primary path for heat removal; improves θJA to 46.1°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation design with fast transient response (<10 µs) and stable operation using ceramic output capacitors. |
| Auto-Skip Eco-Mode™ | Reduces switching frequency under light load to maintain >85% efficiency at 10 mA - critical for always-on consumer electronics. |
| Integrated 160 mΩ/110 mΩ MOSFETs | Eliminates external power stage components; optimizes conduction loss for 2 A loads at 1.05–3.3 V outputs. |
| Pre-biased soft start | Prevents reverse current flow during startup when output is already biased - avoids system-level brownout or bus contention. |
| Power good (PG) with 10 ms fault delay | Provides reliable system sequencing signal; fault reporting includes 10 ms debounce to reject transient dips. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Supplies 1.2 V/1.8 V/3.3 V rails to SoC, memory, and video processing ICs in slim-profile flat-panel TVs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 2 A at 1.2 V with tight load-transient response for dynamic video workloads. Use Value: D-CAP2™ control meets <50 mV output deviation during 1 A step load; Eco-Mode™ maintains >88% efficiency at standby current. | Use Scenario: Powers laser diode driver, servo motor controller, and HDMI interface in high-definition optical disc players. IC Role / Device Role / Timing Role: Point-of-load converter generating 1.8 V/2.5 V from 12 V input; handles burst-mode servo loads with minimal output ripple. Use Value: Low 160 mΩ/110 mΩ RDS(on) minimizes thermal rise in sealed enclosure; 700-kHz switching enables compact 2.2 µH inductor. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Provides regulated 1.05 V core voltage to ARM-based gateway processors in DOCSIS 3.0 cable modems and fiber ONTs. IC Role / Device Role / Timing Role: High-efficiency buck converter operating from 12 V adapter input; supports dynamic voltage scaling during traffic bursts. Use Value: Adjustable soft start prevents inrush into large output capacitance; PG signal enables safe processor reset sequencing. | Use Scenario: Generates 3.3 V and 1.2 V rails for demodulator, decoder, and HDMI transmitter in satellite/cable STBs. IC Role / Device Role / Timing Role: Dual-rail capable converter (via separate designs); delivers 2 A at 3.3 V for USB peripherals and Ethernet PHYs. Use Value: Ceramic-capacitor compatibility eliminates electrolytic bulk caps - extends lifetime and reduces board height in space-constrained chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227RGTR | Same 16-pin QFN package, 2-A rating, but adds integrated 5-V LDO for auxiliary rail; higher quiescent current (120 µA vs 1.8 µA shutdown). | Preferred when dual-rail (main + 5 V) generation is required; less suitable for ultra-low-power standby systems. | Select TPS54227RGTR only if auxiliary 5-V output is needed - otherwise TPS54226RGTR offers lower IQ and simpler BOM. |
| MP2307DN-LF-Z | 2-A buck with fixed 700-kHz frequency, no Eco-Mode™; higher RDS(on) (200 mΩ/140 mΩ); lacks PG, pre-biased soft start, and D-CAP2™ transient performance. | Better suited for cost-sensitive, non-critical applications where ±5% output tolerance and slower transients are acceptable. | Choose MP2307DN-LF-Z for basic 12 V-to-3.3 V conversion where advanced features aren't required - not recommended for digital TV or STB designs demanding tight regulation. |
Compared with TPS54226RGTR, TPS54227RGTR adds auxiliary 5-V capability at the cost of higher light-load current, while MP2307DN-LF-Z sacrifices Eco-Mode™, PG, and D-CAP2™ responsiveness for lower unit cost - making TPS54226RGTR the optimal balance of performance, integration, and efficiency for consumer audio/video power rails.
Availability
TPS54226RGTR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc players, networking home terminals, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for TPS54226RGTR 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 TPS54226RGTR belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained, high-efficiency consumer electronics power supplies requiring fast transient response and ceramic-capacitor compatibility.
FAQ
What is the maximum output current supported by the TPS54226RGTR?
The TPS54226RGTR is rated for continuous 2-A output current under recommended operating conditions (TA = –40°C to 85°C, proper thermal management). 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 design using the exposed PowerPAD™ and PCB copper area.
Does the TPS54226RGTR require external compensation components?
No, the TPS54226RGTR does not require external compensation components. Its D-CAP2™ adaptive on-time control architecture provides inherent stability with ceramic output capacitors, eliminating the need for type-II or type-III compensation networks - simplifying design and reducing BOM count.
Can the TPS54226RGTR start up into a pre-biased output voltage?
Yes, the TPS54226RGTR supports pre-biased soft start. Its proprietary circuit gradually enables synchronous rectification by incrementing low-side FET on-time cycle-by-cycle, preventing reverse current flow and ensuring smooth ramp-up even when VO is initially biased above the target regulation voltage.
What is the purpose of the VREG5 pin on the TPS54226RGTR?
The VREG5 pin on the TPS54226RGTR is a 5.5-V internal LDO output that powers internal control circuitry and serves as a bias supply for the open-drain PG output. It requires a 1-µF ceramic capacitor to GND and can source up to 70 mA - sufficient to drive external logic or small auxiliary loads.
How does the Auto-Skip Eco-Mode™ improve efficiency in the TPS54226RGTR?
The Auto-Skip Eco-Mode™ in the TPS54226RGTR reduces switching frequency under light load by skipping pulses while maintaining regulation, lowering gate-drive and switching losses. This achieves <10 µA shutdown current and >85% efficiency at 10 mA - significantly extending battery life or reducing standby power in always-on consumer devices.
TPS54226RGTR 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)
TPS54226RGTR FAQ
1.How can I place an order for TPS54226RGTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54226RGTR 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 TPS54226RGTR reliable?
The price and inventory of TPS54226RGTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54226RGTR is usually 5 days.
3.What payment methods are accepted for TPS54226RGTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54226RGTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54226RGTR?
TPS54226RGTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54226RGTR 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 TPS54226RGTR?
For technical support, including TPS54226RGTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54226RGTR requirements.
6.How does Aetrix verify that TPS54226RGTR is sourced from the original manufacturer or authorized distributors?
All TPS54226RGTR 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 TPS54226RGTR meets industry standards.
7.What is the process for return or replacement of TPS54226RGTR?
All TPS54226RGTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54226RGTR, 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 TPS54226RGTR part is unused and in its original packaging.
Return procedure for TPS54226RGTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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