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Texas Instruments TPS54227DDA
- Part No.:
- TPS54227DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54227DDA.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:274
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Product details
Overview
TPS54227DDA from Texas Instruments is a 2-A synchronous step-down DC/DC converter in an 8-pin HSOP PowerPAD™ package, featuring D-CAP2™ adaptive on-time control, 4.5-V to 18-V input range, 0.76-V to 7-V adjustable output, and 700-kHz switching frequency. It delivers high efficiency with integrated 155-mΩ high-side and 108-mΩ low-side MOSFETs, enabling compact power supplies for digital TV, STB, and networking terminals.
For engineers reviewing the TPS54227DDA datasheet, TPS54227DDA pinout, TPS54227DDA application, or TPS54227DDA equivalent, key selection considerations include its D-CAP2 transient response capability, prebiased soft-start behavior, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The TPS54227DDA implements adaptive on-time D-CAP2™ control using an internal one-shot timer whose ON-time scales inversely with VIN and proportionally with VOUT, yielding pseudo-constant 700-kHz operation across input and load conditions. Its proprietary feedback architecture eliminates need for ESR-induced ripple and supports ultra-low-ESR ceramic capacitors.
It integrates dual N-channel MOSFETs (155 mΩ HS / 108 mΩ LS), a 5.5-V LDO (VREG5) with ±100-mV load regulation, and a temperature-compensated valley-current OCP that triggers at 2.5–4.7 A depending on inductor value. Operation spans –40°C to 85°C ambient with junction-to-board thermal resistance of 16.2°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - Supports wide-input industrial and consumer rails including 5 V, 12 V, and 15 V bus systems. |
| Output Current | 2 A continuous - Sustains full rated load without derating at TA = 85°C with proper PCB thermal design. |
| Switching Frequency | 700 kHz - Enables compact magnetics and filtering while maintaining >90% efficiency at 1.05 V/2 A (VIN = 12 V). |
| Feedback Reference | 0.765 V ±15 mV - High-accuracy bandgap reference enables precise output voltage setting with 1% resistor dividers. |
| High-Side RDS(on) | 155 mΩ - Minimizes conduction loss in high-duty-cycle applications (e.g., 3.3 V out from 12 V in). |
| Shutdown Current | <10 μA - Ensures ultra-low system standby power for always-on consumer electronics. |
| Thermal Shutdown | 165°C threshold with 35°C hysteresis - Provides robust overtemperature protection without latch-up. |
Pinout & Package
TPS54227DDA uses an 8-pin HSOP (SO PowerPAD™) package with 4.89 mm × 3.90 mm body size and exposed thermal pad on underside requiring solder connection to GND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; internal 220–880 kΩ pull-down ensures default disable; 1.6 V threshold enables reliable sequencing. |
| 2 - VFB | Feedback input | Connects to resistor divider from VOUT; 0.765 V reference sets output voltage; ±0.1 μA input bias minimizes divider error. |
| 3 - VREG5 | 5.5-V LDO output | Supplies gate drive and internal circuitry; active only when EN = high; requires 1-μF ceramic capacitor to GND. |
| 4 - SS | Soft-start control | External capacitor to GND sets ramp time; 2-μA charge current enables adjustable start-up; supports prebiased output startup. |
| 5 - GND | Power ground | Single-point return for sensitive analog signals (SS, VFB); must be routed separately from PGND to minimize noise coupling. |
| 6 - SW | Switch node | Connection between HS and LS FETs; high dv/dt node requiring tight layout; connects to bootstrap capacitor and inductor. |
| 7 - VBST | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-μF ceramic capacitor to SW for high-side gate drive. |
| 8 - VIN | Main input supply | Accepts 4.5–18 V; requires local 10-μF ceramic + optional 0.1-μF HF bypass; feeds both power stage and internal regulators. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables stable operation with zero external compensation and fast transient response (<10 µs recovery for 1-A load step) using ceramic output capacitors. |
| Prebiased soft-start | Prevents reverse current flow during startup into precharged outputs by gradually enabling synchronous rectification-critical for hot-swap and multi-rail systems. |
| Cycle-by-cycle overcurrent limit | Monitors low-side FET voltage during conduction; non-latching protection with 7-cycle fault detection reduces false trips under pulse loads. |
| Integrated 5.5-V VREG5 LDO | Self-powered gate driver supply eliminates need for external bias rail; ±100-mV load regulation ensures consistent gate drive across output current range. |
| Exposed thermal pad (PowerPAD™) | Reduces junction-to-board thermal resistance to 16.2°C/W, enabling 2-A operation at 85°C ambient with minimal copper area. |
Applications
| Digital Television Power Supply | High-Definition Blu-ray Disc™ Player |
|---|---|
|
Use Scenario: Powers 1.05-V core logic and 3.3-V I/O rails from 12-V main supply in slim-profile flat-panel TV chassis with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 1.05-V/2-A and 3.3-V/1-A outputs using D-CAP2™'s fast transient response to handle video processing load bursts. Use Value: Eliminates external compensation network and reduces output capacitance by 40% vs traditional voltage-mode controllers, saving board space and BOM cost. |
Use Scenario: Supplies 1.2-V SoC core and 1.8-V memory interface in BD player with rapid power-state transitions and standby current <10 μA. IC Role / Device Role / Timing Role: Standby-optimized DC/DC converter providing tightly regulated low-voltage rails with prebiased soft-start to avoid brownout during wake-from-sleep sequences. Use Value: Achieves <10 μA shutdown current and seamless transition from precharged 1.2-V rail, preventing data corruption during instant-on functionality. |
| Networking Home Terminal | Digital Set Top Box (STB) |
|
Use Scenario: Generates 1.8-V PHY and 2.5-V switch fabric rails in DOCSIS 3.1 cable modem with high line/load regulation requirements across temperature. IC Role / Device Role / Timing Role: Dual-output capable buck controller (with external resistors) delivering stable 1.8-V/2-A and 2.5-V/1.5-A outputs with ±1% total output error over –40°C to 85°C. Use Value: 0.765-V reference accuracy ±15 mV and <25-mV line regulation ensure compliance with Ethernet PHY voltage tolerance specs under varying AC adapter input. |
Use Scenario: Powers 1.05-V MPEG decoder and 3.3-V tuner subsystem in satellite STB with high reliability demand and no fan cooling. IC Role / Device Role / Timing Role: Thermally robust 2-A buck converter operating continuously at 85°C ambient using HSOP PowerPAD™ thermal pad soldered to 2-oz copper ground plane. Use Value: Junction-to-board RθJB = 16.2°C/W allows full 2-A load without thermal throttling, eliminating need for heatsinks or airflow in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54229DDA | Same 8-pin HSOP package, but supports 4.5–18 V input, 0.76–7 V output, and 2.5-A rating; higher current capability with 120-mΩ HS/70-mΩ LS FETs. | Preferred where peak load exceeds 2 A or lower conduction loss is required at light loads due to improved RDS(on) and optimized gate drive. | Select TPS54229DDA if future-proofing for higher current or tighter thermal margins is needed; pinout and footprint are identical. |
| MP2307DN-LF-Z | Monolithic 2-A buck in 8-pin SOIC; 4.5–28 V input, 0.925–15 V output; fixed 500-kHz frequency; no VREG5 LDO or prebiased soft-start. | Suitable for simpler, cost-sensitive designs where 5.5-V bias rail and prebias startup are not required, and wider input range justifies trade-offs. | Choose MP2307DN-LF-Z only when VREG5 independence and prebias support are unnecessary; requires external 5-V bias and lacks D-CAP2 transient performance. |
Compared with TPS54227DDA, TPS54229DDA offers higher current headroom and lower FET losses in same footprint, while MP2307DN-LF-Z trades advanced features for broader input range and lower unit cost-making TPS54227DDA optimal for balanced performance, thermal, and feature requirements in consumer power rails.
Availability
TPS54227DDA is available at Aetrix Electronics and suitable for digital television power supplies, high-definition Blu-ray Disc™ players, and networking home terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54227DDA 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 TPS54227DDA belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for space-constrained consumer electronics requiring fast transient response, ultra-low standby power, and simplified layout without external compensation.
FAQ
What is the maximum output current capability of the TPS54227DDA?
The TPS54227DDA 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 activates at 2.5–4.7 A depending on inductor value, and thermal shutdown engages at 165°C junction temperature-allowing sustained 2-A operation with adequate copper pour on the thermal pad.
Does the TPS54227DDA require external compensation components?
No, the TPS54227DDA 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 typically used in voltage-mode or current-mode controllers.
Can the TPS54227DDA safely start up into a precharged output voltage?
Yes, the TPS54227DDA supports prebiased soft-start. When the output is precharged above the target voltage, it gradually enables the low-side FET with narrow, incrementing ON-times to avoid sinking current from the output-ensuring smooth, non-disruptive startup in hot-swap and multi-rail systems.
What is the purpose of the VREG5 pin on the TPS54227DDA?
The VREG5 pin on the TPS54227DDA is a 5.5-V internal LDO output that powers the high-side gate driver and internal control circuitry. It is active only when EN is high, requires a 1-μF ceramic capacitor to GND, and provides ±100-mV load regulation-eliminating the need for an external bias supply.
How does the TPS54227DDA achieve fast transient response without external components?
The TPS54227DDA achieves fast transient response through its D-CAP2™ control architecture, which combines adaptive on-time PWM with an internal high-frequency zero that boosts phase margin. This allows sub-10-µs recovery from 1-A load steps using only ceramic output capacitors-no external RC networks or compensation are needed.
TPS54227DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- 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:
- 8-SO PowerPad
TPS54227DDA FAQ
1.How can I place an order for TPS54227DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54227DDA 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 TPS54227DDA reliable?
The price and inventory of TPS54227DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54227DDA is usually 5 days.
3.What payment methods are accepted for TPS54227DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54227DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54227DDA?
TPS54227DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54227DDA 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 TPS54227DDA?
For technical support, including TPS54227DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54227DDA requirements.
6.How does Aetrix verify that TPS54227DDA is sourced from the original manufacturer or authorized distributors?
All TPS54227DDA 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 TPS54227DDA meets industry standards.
7.What is the process for return or replacement of TPS54227DDA?
All TPS54227DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54227DDA, 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 TPS54227DDA part is unused and in its original packaging.
Return procedure for TPS54227DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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