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Texas Instruments TPS54225PWP
- Part No.:
- TPS54225PWP
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54225PWP.pdf
- Description:
- IC REG BUCK ADJ 2A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,335
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Product details
Overview
TPS54225PWP 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, 700-kHz pseudo-fixed switching frequency, and operation from 4.5 V to 18 V VCC input for digital TV power supplies.
For engineers reviewing the TPS54225PWP datasheet, TPS54225PWP pinout, TPS54225PWP application, or TPS54225PWP equivalent, key selection considerations include its adjustable soft-start, pre-biased startup capability, power-good output, cycle-by-cycle overcurrent protection, and thermal shutdown at 150°C - all in a 14-pin HTSSOP PowerPAD™ package.
Technical Context
The TPS54225PWP implements D-CAP2™ mode control using an adaptive on-time PWM architecture that eliminates external compensation while supporting ceramic and low-ESR polymer output capacitors. Its internal 5.5-V LDO (VREG5) powers control circuitry and supplies the bootstrap driver via internal diode-connected path to VBST.
Control logic monitors feedback voltage (VFB) against a 0.765-V reference, triggers power good after 1.7× soft-start time, and enforces output OVP (120% trip), UVP (70% trip), and non-latching thermal shutdown. Current limiting uses valley-current detection on PGND-referenced SW pins with temperature-compensated sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 2 A continuous - supports mid-power point-of-load regulation in consumer electronics. |
| Input voltage range (VCC) | 4.5 V to 18 V - enables direct connection to 5 V, 12 V, or 15 V intermediate bus rails. |
| Output voltage range | 0.76 V to 5.5 V - programmable via resistor divider for core, I/O, or peripheral rail generation. |
| Switching frequency | ~700 kHz - balances efficiency, size, and EMI in compact PCB layouts. |
| RDS(on) high-side / low-side | 160 mΩ / 110 mΩ - minimizes conduction loss at 2-A load, enabling >90% efficiency at 3.3-V/2-A. |
| Soft-start control | Adjustable via external capacitor - prevents inrush current and enables controlled ramp-up into pre-biased outputs. |
| Power good output | Open-drain PG pin - signals valid regulation after 1.7× soft-start delay with ±10% window. |
Pinout & Package
The TPS54225PWP is housed in a 14-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad soldered to PGND for enhanced thermal dissipation (θJCbot = 4.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO | Output voltage sense and on-time adjustment node | Connects directly to output capacitor; used internally to set adaptive on-time duration. |
| VFB | Feedback input | Monitors divided output voltage; compares to 0.765-V internal reference for regulation. |
| VREG5 | 5.5-V regulated output | Powers internal logic and provides bias for VBST charging; requires 1-μF ceramic bypass to PGND. |
| SS | Soft-start timing control | Charged by 2-μA internal current source; sets ramp time via external capacitor to GND. |
| GND | Signal ground reference | Reference for analog circuits; must be connected separately from PGND near IC. |
| PG | Power good open-drain output | Asserts high when VO is within ±10% of target after soft-start completion; requires pull-up to VREG5. |
| EN | Enable input | Active-high logic control; EN < 0.4 V disables device and activates output discharge MOSFET. |
| VCC | Control circuit supply | Accepts 4.5–18 V; powers gate drivers, logic, and internal regulators (excluding VREG5 LDO). |
| VIN | Main power input | Drives high-side FET drain; accepts 2–18 V; requires local ceramic decoupling. |
| VBST | Bootstrap supply for high-side gate | Charged via internal diode from VREG5; requires 0.1-μF ceramic cap to SW1/SW2. |
| SW1, SW2 | High-side/low-side switch nodes | Connect to inductor; serve as current-sense inputs for valley-current OCP and VBST charging. |
| PGND1, PGND2 | Power ground returns | Low-side FET sources and current comparator references; must be tied strongly to PowerPAD™. |
| PowerPAD™ | Exposed thermal pad | Must be soldered to PGND plane; primary heat path (θJCbot = 4.3°C/W); not electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable operation with zero external compensation and ultra-low-ESR ceramic output capacitors. |
| Pre-biased soft start | Prevents sinking current from pre-charged output by gradually enabling low-side FET conduction. |
| Integrated 5.5-V VREG5 LDO | Supplies internal circuitry and bootstraps high-side gate without external bias supply. |
| Cycle-by-cycle overcurrent protection | Valley-current detection on SW pins ensures fast, accurate current limiting without sensing resistors. |
| Output discharge on disable | Internal 50-Ω MOSFET actively discharges VO to PGND when EN = low or fault occurs. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player |
|---|---|
Use Scenario: Supplies 1.05 V/2 A core voltage to SoC in flat-panel TV main board with tight space constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering clean, tightly regulated CPU core rail with fast transient response. Use Value: D-CAP2™ control maintains regulation during burst-mode video processing loads without external compensation components. | Use Scenario: Generates 3.3 V/1.5 A for HDMI interface and optical drive controller in HD Blu-ray player. IC Role / Device Role / Timing Role: Point-of-load converter providing low-noise, ripple-sensitive I/O rail with power-good sequencing. Use Value: Adjustable soft-start and pre-biased startup prevent brownout during hot-plug HDMI events and ensure reliable disc spin-up. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Powers 1.8 V/2 A processor and 2.5 V/1 A memory subsystem in cable modem/router combo unit. IC Role / Device Role / Timing Role: Dual-rail buck converter supporting independent enable and power-good signaling for multi-rail sequencing. Use Value: Integrated VREG5 and dual PGND pins simplify layout and reduce noise coupling between analog and digital sections. | Use Scenario: Delivers 1.2 V/2 A to ARM-based media processor and 5 V/0.5 A to tuner module in compact STB chassis. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck regulator operating across –40°C to 85°C ambient. Use Value: PowerPAD™ thermal pad enables full 2-A output in confined enclosures without heatsinks or forced air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227PWP | Same pinout, 3-A rating, higher RDS(on) (130 mΩ HS / 85 mΩ LS), fixed 700-kHz frequency | Supports higher load currents but with slightly lower peak efficiency at 2 A | Choose for future-proofing or margin headroom where 3-A capability is needed. |
| MP2307DN-LF-Z | 3-A, 23-V max input, no VREG5 output, external compensation required, SOIC-8 package | Lacks integrated bias rail and pre-biased soft start; requires more external components | Choose for cost-sensitive designs where VREG5 and advanced startup features are unnecessary. |
Compared with TPS54225PWP, the TPS54227PWP offers higher current capacity in identical packaging but trades off some efficiency at 2-A loads, while the MP2307DN-LF-Z reduces BOM count through smaller footprint yet sacrifices integration depth and startup flexibility.
Availability
TPS54225PWP 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 industrial temperature ranges.
Supply support for TPS54225PWP 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 company headquartered in Dallas, Texas, designing analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS54225PWP belongs to TI's SWIFT™ family of high-efficiency DC/DC converters, engineered specifically for space-constrained, high-transient consumer electronics power systems requiring minimal external components and robust thermal performance.
FAQ
What is the maximum input voltage the TPS54225PWP can handle?
The TPS54225PWP supports a VCC input voltage range of 4.5 V to 18 V and a VIN power input range of 2 V to 18 V. Absolute maximum ratings specify VIN and VCC up to 20 V, but sustained operation above 18 V violates recommended conditions and risks reliability. The device includes internal UVLO and overvoltage protection to safeguard against transients.
Does the TPS54225PWP support pre-biased output startup?
Yes, the TPS54225PWP implements proprietary pre-biased soft start. When the output is already charged before enable, the controller incrementally increases low-side FET on-time cycle-by-cycle instead of forcing immediate conduction - preventing reverse current flow and ensuring smooth, monotonic ramp-up of VO without undershoot or oscillation.
What thermal management is required for the TPS54225PWP at full 2-A load?
At 2-A continuous load with 12-V input and 3.3-V output, the TPS54225PWP dissipates ~0.6 W. Its θJCbot of 4.3°C/W requires the PowerPAD™ thermal pad to be fully soldered to a ≥2 cm² PGND copper area with ≥4 thermal vias to inner ground planes. Without this, junction temperature may exceed 125°C under worst-case ambient conditions.
Can the TPS54225PWP operate without an external VREG5 bypass capacitor?
No - the TPS54225PWP requires a 1.0-μF ceramic capacitor connected between VREG5 and PGND. This capacitor stabilizes the internal 5.5-V LDO, ensures proper VBST charging via the internal diode, and prevents instability in the overcurrent limit circuit. Omission causes erratic switching, premature OCP trips, or failure to start.
How does the TPS54225PWP achieve stable regulation with ceramic output capacitors?
The TPS54225PWP uses D-CAP2™ mode control, which embeds internal ripple injection to simulate ESR-derived ripple - eliminating the need for minimum ESR requirements. This allows direct use of ultra-low-ESR ceramic capacitors (e.g., 22 μF X5R) while maintaining phase margin and transient stability without external compensation networks.
TPS54225PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™, D-CAP2™
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
TPS54225PWP FAQ
1.How can I place an order for TPS54225PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54225PWP 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 TPS54225PWP reliable?
The price and inventory of TPS54225PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54225PWP is usually 5 days.
3.What payment methods are accepted for TPS54225PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54225PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54225PWP?
TPS54225PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54225PWP 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 TPS54225PWP?
For technical support, including TPS54225PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54225PWP requirements.
6.How does Aetrix verify that TPS54225PWP is sourced from the original manufacturer or authorized distributors?
All TPS54225PWP 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 TPS54225PWP meets industry standards.
7.What is the process for return or replacement of TPS54225PWP?
All TPS54225PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54225PWP, 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 TPS54225PWP part is unused and in its original packaging.
Return procedure for TPS54225PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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