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Texas Instruments TPS54225PWPR
- Part No.:
- TPS54225PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54225PWPR.pdf
- Description:
- IC REG BUCK ADJ 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,971
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Product details
Overview
TPS54225PWPR 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, operating from 4.5 V to 18 V input and delivering adjustable output (0.76 V–5.5 V) at up to 2 A. It employs D-CAP2™ adaptive on-time control for fast transient response in digital TV power supplies and Blu-ray disc player voltage rails.
For engineers reviewing the TPS54225PWPR datasheet, TPS54225PWPR pinout, TPS54225PWPR application, or TPS54225PWPR equivalent, key selection considerations include its 700-kHz pseudo-fixed switching frequency, pre-biased soft-start capability, power-good output, cycle-by-cycle overcurrent protection, and HTSSOP-14 PowerPAD™ thermal package compatibility with ceramic output capacitors.
Technical Context
The TPS54225PWPR implements D-CAP2™ mode control-combining adaptive on-time PWM with internal ripple injection-to achieve stable regulation without external compensation, even with ultra-low-ESR ceramic output capacitors. Its on-time is inversely proportional to VIN and proportional to VOUT, yielding ~700 kHz operation across input and load conditions.
It integrates dual N-FETs, a 5.5-V VREG5 LDO, adjustable soft-start via external capacitor, open-drain power-good output with 1.7× soft-start delay activation, and comprehensive protection including cycle-by-cycle OCP, output OVP/UVP (115–125% / 65–75%), UVLO (3.55–4.05 V), and thermal shutdown (150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V (VCC supply); 2 V to 18 V (VIN power path) - supports wide-input industrial and consumer rails. |
| Output Current | 2 A continuous - sufficient for core logic rails in STB, networking terminals, and HD media devices. |
| Output Voltage Range | 0.76 V to 5.5 V - programmable via resistor divider; enables 1.05 V, 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V outputs. |
| Switching Frequency | ~700 kHz (adaptive on-time) - balances efficiency, size, and EMI; no external clock required. |
| MOSFET RDS(on) | 160 mΩ (high-side), 110 mΩ (low-side) - optimized for lower-duty-cycle applications like 1.05 V @ 12 V input. |
| Soft-Start Control | Adjustable via external SS capacitor - enables controlled ramp-up and prevents inrush into pre-biased outputs. |
| Power-Good Output | Open-drain PG with ±10% window and 1.7× soft-start delay - provides reliable system sequencing and fault indication. |
Pinout & Package
TPS54225PWPR uses the 14-pin HTSSOP package with exposed PowerPAD™ thermal pad (PWP), requiring soldering to PGND for thermal performance (θJA = 55.6°C/W). The PowerPAD™ must be connected to PGND via multiple thermal vias for reliable 2-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output voltage sense and on-time adjustment node | Connects directly to output rail; used internally for adaptive timing and feedback loop stability. |
| VFB (Pin 2) | Feedback input | Accepts resistor-divider voltage; reference threshold is 765 mV ±2 mV (25°C), enabling precise output regulation. |
| VREG5 (Pin 3) | 5.5-V regulated output | Powers internal circuitry; requires 1-μF ceramic bypass to PGND; supplies VBST charge pump and EN logic. |
| SS (Pin 4) | Soft-start control | Sinks 2 μA current to charge external capacitor; determines startup time and enables pre-biased start. |
| GND (Pin 5) | Signal ground reference | Reference for analog circuits; must be isolated from PGND until single-point connection per layout guidelines. |
| PG (Pin 6) | Power-good open-drain output | Asserts high when VFB is within ±10% of target after 1.7× soft-start time; requires pull-up to VREG5 (20–150 kΩ). |
| EN (Pin 7) | Enable input | Active-high logic; thresholds are 2 V (high), 0.4 V (low); supports sequencing and standby control. |
| PGND1, PGND2 (Pins 8,9) | Power ground return paths | Low-side FET source returns and current-sense inputs; must be tied strongly to PowerPAD™ near device. |
| SW1, SW2 (Pins 10,11) | Switch node connections | Connect to inductor; serve as inputs to current comparators and VBST bootstrap paths; high dv/dt nodes. |
| VBST (Pin 12) | Bootstrap supply for high-side gate driver | Requires 0.1-μF ceramic capacitor to SW1/SW2; internal diode charges from VREG5 during low-side conduction. |
| VIN (Pin 13) | Main power input | Drain connection of high-side FET; accepts 2–18 V; requires local 10-μF ceramic decoupling. |
| VCC (Pin 14) | Control circuit supply | Accepts 4.5–18 V; powers bias circuitry; can be shorted to VIN if input meets VCC range. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable regulation with zero external compensation components and full compatibility with ceramic output capacitors. |
| Pre-biased soft-start | Prevents reverse current flow during startup into pre-charged outputs by gradually enabling synchronous rectification. |
| Integrated 5.5-V VREG5 LDO | Provides clean, regulated supply for internal logic and gate drivers; delivers up to 70 mA and supports VBST charging. |
| Cycle-by-cycle overcurrent protection | Monitors low-side FET voltage during conduction; non-latching, temperature-compensated, with 2.5–4.5 A trip range. |
| Output discharge function | Activates internal 50-Ω MOSFET from VO to PGND when disabled or faulted - ensures safe output collapse without sinking external loads. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Provides 1.2 V core voltage for MPEG decoder SoC and 3.3 V I/O rail in slim-form-factor flat-panel TV mainboards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator handling dynamic load steps up to 1.5 A with <100 µs recovery. Use Value: D-CAP2™ control eliminates need for external compensation, reducing BOM count and PCB area while maintaining <±1% output regulation under video processing transients. |
Use Scenario: Generates 1.05 V DDR3 memory supply and 5 V servo motor rail in optical disc drive subsystems. IC Role / Device Role / Timing Role: Dual-output capable via cascaded configuration; delivers tight ripple (<15 mVpp) essential for signal integrity in high-speed data channels. Use Value: Pre-biased soft-start prevents voltage droop on shared 5 V bus during disc spin-up, avoiding system reset events. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Powers 1.8 V PHY interface and 2.5 V switch controller in DOCSIS 3.0 cable modems with PoE backup input. IC Role / Device Role / Timing Role: Input-capable down to 2 V enables seamless switchover between AC adapter and PoE-derived 5 V input. Use Value: Wide VCC range (4.5–18 V) and robust UVLO (3.55–4.05 V) ensure uninterrupted operation during brownout conditions on auxiliary supplies. |
Use Scenario: Supplies 3.3 V HDMI transmitter and 1.2 V ARM Cortex-A9 core in hybrid broadcast-broadband STBs. IC Role / Device Role / Timing Role: Power-good output sequences FPGA configuration and audio codec enable signals with precise timing margin. Use Value: Open-drain PG with 1.7× soft-start delay guarantees downstream logic only activates after full regulation is achieved, preventing initialization faults. |
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 14-pin HTSSOP package, 2-A rating, but supports wider input (4.5–28 V) and includes integrated 5-V LDO with higher 100-mA output. | Better suited for 24-V industrial input systems; not drop-in for 18-V max designs due to higher VIN absolute max (30 V vs. 20 V). | Select TPS54227PWPR only if input exceeds 18 V or higher VREG5 current (>10 mA) is required. |
| MP2307DN-LF-Z | Monolithic 2-A buck with 4.5–23 V input, fixed 700-kHz frequency, no VREG5 output, and no pre-biased soft-start. | Lacks power-good signaling and VREG5 supply; requires external bias for gate drivers; less suitable for sequenced multi-rail systems. | Choose MP2307DN-LF-Z only for cost-sensitive, single-rail applications where PG, VREG5, and pre-bias support are unnecessary. |
Compared with TPS54225PWPR, TPS54227PWPR extends input range and VREG5 capability but increases quiescent current; MP2307DN-LF-Z reduces feature set and system integration level, requiring additional external components for sequencing and biasing.
Availability
TPS54225PWPR is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray disc players, networking home terminals, and digital set-top boxes requiring stable component supply, consistent tape-and-reel packaging (2000 units/reel), and long-term production continuity.
Supply support for TPS54225PWPR 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 system-level power architecture.
The TPS54225PWPR belongs to TI's SWIFT™ synchronous buck converter family, designed specifically for space-constrained, high-transient consumer electronics applications demanding minimal external components and robust reliability across –40°C to 85°C.
FAQ
What is the maximum recommended junction temperature for continuous operation of the TPS54225PWPR?
The TPS54225PWPR has a maximum recommended operating junction temperature of 125°C, as specified in the Recommended Operating Conditions table. Thermal shutdown activates at 150°C (typical), but sustained operation above 125°C may impact long-term reliability and parametric performance. Proper PCB thermal design-including soldering the PowerPAD™ to PGND with ≥6 thermal vias-is essential to maintain TJ ≤ 125°C at 2-A load and 12-V input.
Does the TPS54225PWPR support pre-biased output startup, and how does it work?
Yes, the TPS54225PWPR supports pre-biased soft-start. When enabled, it detects if the output voltage exceeds the soft-start command level and initiates low-side FET gate pulses with narrow, incrementally increasing on-time-avoiding reverse current flow. This behavior is intrinsic to the TPS54225PWPR control architecture and requires no external components. It ensures smooth ramp-up into regulation without disturbing other powered rails sharing the same output node.
What is the purpose of the VREG5 pin on the TPS54225PWPR, and what load can it drive?
The VREG5 pin on the TPS54225PWPR delivers a regulated 5.5-V output (5.3–5.7 V) used to power internal circuitry and the VBST charge pump. It can supply up to 70 mA (typical) with ±100 mV load regulation. A 1-μF ceramic capacitor must be placed between VREG5 and PGND. While not intended as a general-purpose supply, it may power light external loads such as enable logic or level-shifters-if total current remains ≤10 mA to avoid affecting VBST charging or PG accuracy.
Can the TPS54225PWPR be used with ceramic output capacitors, and why is this significant?
Yes, the TPS54225PWPR is explicitly designed for ceramic output capacitors, enabled by its D-CAP2™ control architecture and internal ripple injection circuitry. Unlike traditional voltage-mode or current-mode controllers, it remains stable with near-zero ESR ceramics (e.g., X5R/X7R), eliminating the need for bulk electrolytic or POSCAP capacitors. This reduces solution size, improves reliability, lowers output ripple (<15 mVpp typical), and simplifies layout-key advantages for compact consumer electronics like STBs and Blu-ray players.
How does the power-good (PG) function of the TPS54225PWPR behave during startup and fault conditions?
The TPS54225PWPR's PG output asserts high only after 1.7× the soft-start time elapses and VFB remains within ±10% of the target voltage. If VFB falls below 90% (or rises above 110%) of the setpoint, PG pulls low after a 10-ms internal delay. During faults-including OVP, UVP, UVLO, or thermal shutdown-PG deasserts within milliseconds. The open-drain structure requires an external pull-up (20–150 kΩ to VREG5) and enables precise system-level power sequencing for the TPS54225PWPR and downstream ICs.
TPS54225PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™
- 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
TPS54225PWPR FAQ
1.How can I place an order for TPS54225PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54225PWPR 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 TPS54225PWPR reliable?
The price and inventory of TPS54225PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54225PWPR is usually 5 days.
3.What payment methods are accepted for TPS54225PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54225PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54225PWPR?
TPS54225PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54225PWPR 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 TPS54225PWPR?
For technical support, including TPS54225PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54225PWPR requirements.
6.How does Aetrix verify that TPS54225PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54225PWPR 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 TPS54225PWPR meets industry standards.
7.What is the process for return or replacement of TPS54225PWPR?
All TPS54225PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54225PWPR, 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 TPS54225PWPR part is unused and in its original packaging.
Return procedure for TPS54225PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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