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Texas Instruments TPS54226PWPR
- Part No.:
- TPS54226PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54226PWPR.pdf
- Description:
- IC REG BUCK ADJ 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,393
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Product details
Overview
TPS54226PWPR 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, targeting digital TV power supplies and Blu-ray disc players.
For engineers reviewing the TPS54226PWPR datasheet, TPS54226PWPR pinout, TPS54226PWPR application, or TPS54226PWPR equivalent, key selection considerations include its 700-kHz pseudo-constant switching frequency, 14-pin HTSSOP PowerPAD™ package with exposed thermal pad, cycle-by-cycle overcurrent protection, and pre-biased soft-start capability for stable startup into pre-charged rails.
Technical Context
The TPS54226PWPR implements D-CAP2™ mode control-combining adaptive on-time PWM with internal ripple injection-to achieve fast transient response without external compensation components. Its on-time is inversely proportional to VIN and proportional to VOUT, enabling ~700 kHz operation across input voltage variations.
It supports seamless transition between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) via Auto-Skip Eco-Mode™, reducing switching losses at light loads. Output discharge is handled by an internal 50 Ω MOSFET (not the low-side FET), preventing negative output voltage during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 2 A continuous; supports peak load currents up to 3.1 A before cycle-by-cycle OCP triggers |
| Input voltage range | VCC: 4.5 V–18 V; VIN: 2 V–18 V-enables single-rail operation from wide-input industrial or adapter-sourced supplies |
| Output voltage range | 0.76 V–5.5 V; set via external resistor divider; 0.765 V internal reference enables precise low-VOUT regulation |
| Switching frequency | ~700 kHz (adaptive on-time); fixed-frequency behavior maintained across VIN/VOUT combinations without oscillator |
| FET RDS(on) | High-side: 160 mΩ; low-side: 110 mΩ-optimized for high-efficiency, low-duty-cycle operation at 3.3 V/2.5 V outputs |
| Efficiency features | Eco-Mode™ reduces quiescent current to <10 μA in shutdown and maintains >85% efficiency at 10 mA load (3.3 V out) |
| Protection functions | Cycle-by-cycle OCP, output OVP/UVP (±15%), thermal shutdown (150°C), UVLO (3.55 V on VREG5), and power good with 10 ms fault delay |
Pinout & Package
The TPS54226PWPR is housed in a 14-pin HTSSOP package with exposed PowerPAD™ thermal pad (PWP suffix), requiring solder connection to PGND for thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output voltage node | Connects directly to output capacitor and feedback divider; used for on-time adjustment in D-CAP2™ loop |
| VFB (Pin 2) | Feedback input | Senses output via resistor divider; 0.765 V reference enables accurate VOUT programming |
| VREG5 (Pin 3) | 5.5 V LDO output | Powers internal circuitry; requires 1 μF ceramic capacitor to GND; supplies VBST via internal diode |
| SS (Pin 4) | Soft-start control | 2 μA current source charges external capacitor; enables adjustable ramp time and pre-biased startup |
| GND (Pin 5) | Signal ground | Reference for analog blocks; must be connected to PGND near IC to minimize noise coupling |
| PG (Pin 6) | Open-drain power good | Asserts high after 1.7× soft-start time when VFB is within ±10%; sinks 5 mA max |
| EN (Pin 7) | Enable input | Active-high logic; 1.5 V threshold; pulls device into shutdown (<10 μA ICC) when low |
| PGND1, PGND2 (Pins 8,9) | Power ground returns | Low-side FET source connections and current sense inputs; must tie strongly to exposed PowerPAD™ |
| SW1, SW2 (Pins 10,11) | Switch nodes | Drain-source junctions of internal FETs; connect to external inductor; critical for EMI and layout |
| VBST (Pin 12) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 μF ceramic cap to SW1/SW2 for high-side gate drive |
| VIN (Pin 13) | Main power input | Connects to high-side FET drain; accepts 2–18 V; requires local 10 μF ceramic decoupling |
| VCC (Pin 14) | Bias supply input | 4.5–18 V input for internal control logic; separate from VIN to improve PSRR and stability |
| Exposed PowerPAD™ | Thermal & electrical ground | Mandatory solder connection to PGND plane; primary path for heat dissipation and low-impedance return |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates need for external compensation; achieves <10 μs load transient response with ceramic output capacitors |
| Auto-Skip Eco-Mode™ | Reduces switching frequency under light load while maintaining regulation-improves efficiency from 65% to >88% at 10 mA (3.3 V out) |
| Pre-biased soft start | Prevents sinking current from pre-charged output rail by gradually enabling low-side FET conduction |
| Integrated 5.5 V LDO (VREG5) | Provides regulated bias for internal logic and bootstrap charging; eliminates need for external LDO in most designs |
| Output discharge MOSFET | 50 Ω internal switch discharges VO to PGND during shutdown-avoids reliance on external bleeder resistors |
Applications
| Digital TV Power Supply | Blu-ray Disc Player |
|---|---|
Use Scenario: Powers SoC core, memory, and video processing rails in 24/7 consumer display systems with tight thermal constraints. IC Role / Device Role / Timing Role: Primary 1.2 V/2 A and 3.3 V/2 A buck regulator delivering stable, low-noise DC from 12 V adapter input. Use Value: D-CAP2™'s fast transient response prevents brownouts during burst-mode video decoding; Eco-Mode™ cuts standby power by >40% vs fixed-frequency alternatives. | Use Scenario: Supplies regulated 1.8 V and 2.5 V rails to optical pickup controller and HDMI interface ICs in portable Blu-ray players. IC Role / Device Role / Timing Role: Synchronous buck converter managing dynamic load steps during disc spin-up and laser activation sequences. Use Value: Pre-biased soft start avoids output voltage collapse when hot-plugging accessories; 700-kHz switching enables compact 2.2 μH inductors and 22 μF ceramic caps. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Delivers 1.05 V/2 A CPU core voltage and 3.3 V/1 A I/O rail in cable/fiber gateway devices with PoE or wall-adapter input. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting bursty Ethernet packet processing and Wi-Fi coexistence. Use Value: Cycle-by-cycle OCP protects against short-circuited PHY ports; thermal shutdown (150°C) ensures reliability in sealed enclosures. | Use Scenario: Generates 1.2 V/2 A and 5 V/1 A rails for MPEG decoder, tuner, and front-panel display in always-on entertainment hubs. IC Role / Device Role / Timing Role: Dual-output-capable buck converter (with external divider tuning) meeting strict 10 mV p-p ripple requirements for video DACs. Use Value: Low 160 mΩ/110 mΩ RDS(on) minimizes conduction loss at full load; PowerPAD™ enables 55.6°C/W θJA in standard 2-layer PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227PWPR | Same pinout, 3-A rating, higher RDS(on) (120 mΩ HS / 75 mΩ LS), 1.5× higher IQ in Eco-Mode™ | Supports higher current but less efficient below 1 A; requires larger output capacitance for same ripple | Select when future-proofing for >2 A loads or when board space allows larger inductor/capacitor |
| MP2315GJ-Z | 3-A, 170 mΩ/110 mΩ, fixed 500 kHz frequency, no Eco-Mode™, no pre-biased soft start | Lacks light-load efficiency optimization and safe startup into pre-biased rails; simpler control but lower transient performance | Choose for cost-sensitive, non-pre-biased applications where 700 kHz switching is not required |
Compared with TPS54226PWPR, TPS54227PWPR offers higher current headroom at the expense of light-load efficiency, while MP2315GJ-Z trades adaptive control and advanced startup features for lower BOM count and fixed-frequency predictability.
Availability
TPS54226PWPR 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 across extended production lifecycles.
Supply support for TPS54226PWPR 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-reliability DC/DC conversion.
The TPS54226 belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for high-efficiency, low-component-count power solutions in consumer electronics with stringent size, thermal, and light-load efficiency requirements.
FAQ
What is the recommended input capacitor configuration for TPS54226PWPR?
TPS54226PWPR requires a minimum 10 μF ceramic capacitor placed close to VIN and PGND pins, plus an additional 0.1 μF capacitor from VCC to GND to stabilize overcurrent detection. The main input capacitor must have voltage rating exceeding maximum VIN (18 V), and low ESR is critical for minimizing input ripple and EMI. TI recommends X5R/X7R dielectrics with 25 V rating.
Does TPS54226PWPR support pre-biased output startup?
Yes, TPS54226PWPR includes proprietary pre-biased soft start. When the output voltage exceeds the soft-start command level at power-up, the controller incrementally enables low-side FET conduction-starting with narrow pulses and increasing duty cycle cycle-by-cycle-preventing reverse current flow and ensuring monotonic ramp-up. This feature is enabled by default and requires no external components.
What is the function of the VREG5 pin on TPS54226PWPR?
The VREG5 pin on TPS54226PWPR outputs a regulated 5.5 V supply (4.5–5.7 V over conditions) that powers internal control circuitry and serves as the source for the internal bootstrap diode charging VBST. It must be bypassed with a 1.0 μF ceramic capacitor to PGND. VREG5 also feeds the EN and PG circuits, and its UVLO threshold (3.55–4.05 V) provides system-level undervoltage lockout.
How does the D-CAP2™ control mode in TPS54226PWPR differ from conventional voltage-mode control?
D-CAP2™ in TPS54226PWPR uses adaptive on-time modulation with internal ripple injection instead of error amplifier + compensation network. It senses output ripple directly at VFB, eliminating dependency on output capacitor ESR for stability. This enables use of ultra-low-ESR ceramics, reduces component count, and delivers sub-10 μs transient response-unachievable with traditional voltage-mode loops requiring careful pole-zero placement.
Can TPS54226PWPR be used with ceramic output capacitors only?
Yes, TPS54226PWPR is explicitly optimized for ceramic output capacitors (22–68 μF typical). Its D-CAP2™ architecture injects synthetic ripple internally, removing the need for ESR-induced ripple required by older constant-on-time controllers. TI validates stability with X5R/X7R ceramics down to 2 mΩ ESR, enabling smaller footprint, lower ripple, and improved reliability versus electrolytic or polymer alternatives.
TPS54226PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™, Eco-Mode™
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- 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:
- 14-HTSSOP
TPS54226PWPR FAQ
1.How can I place an order for TPS54226PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54226PWPR 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 TPS54226PWPR reliable?
The price and inventory of TPS54226PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54226PWPR is usually 5 days.
3.What payment methods are accepted for TPS54226PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54226PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54226PWPR?
TPS54226PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54226PWPR 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 TPS54226PWPR?
For technical support, including TPS54226PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54226PWPR requirements.
6.How does Aetrix verify that TPS54226PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54226PWPR 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 TPS54226PWPR meets industry standards.
7.What is the process for return or replacement of TPS54226PWPR?
All TPS54226PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54226PWPR, 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 TPS54226PWPR part is unused and in its original packaging.
Return procedure for TPS54226PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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