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Texas Instruments TPS54229EDDA
- Part No.:
- TPS54229EDDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54229EDDA.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:8,520
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Product details
Overview
TPS54229EDDA 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, 650-kHz pseudo-fixed switching frequency, and Eco-mode™ for light-load efficiency. It operates from 4.5 V to 18 V input and delivers adjustable output voltage from 0.76 V to 7.0 V, targeting compact power supplies in digital TV and Blu-ray disc players.
For engineers reviewing the TPS54229EDDA datasheet, TPS54229EDDA pinout, TPS54229EDDA application, or TPS54229EDDA equivalent, key selection considerations include its D-CAP2™ transient response capability, pre-biased soft-start support, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and compatibility with ceramic output capacitors down to 20 µF.
Technical Context
The TPS54229EDDA implements D-CAP2™ mode control using an adaptive on-time PWM architecture that eliminates external compensation while maintaining stability with ultra-low-ESR ceramic capacitors. Its internal one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling pseudo-constant 650-kHz operation across input and output voltage ranges.
Eco-mode™ enables automatic transition from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) below ~300 mA load, reducing switching losses and achieving <10 µA shutdown current. Protection features include valley-current-based cycle-by-cycle OCP, non-latching UVLO (3.75 V threshold), and thermal shutdown with 35°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer power rails including 5 V, 12 V, and 15 V bus systems. |
| Output Current | 2 A continuous - sufficient for powering SoCs, FPGAs, and DDR memory subsystems in embedded video applications. |
| Switching Frequency | 650 kHz (pseudo-fixed) - enables compact magnetics and EMI filtering while balancing efficiency and thermal performance. |
| FET RDS(on) | 160 mΩ (HS), 110 mΩ (LS) - optimized for lower duty-cycle operation, minimizing conduction loss at typical 1.05–3.3 V outputs. |
| VFB Accuracy | ±1.7% (749–781 mV) - ensures tight output regulation across temperature and line/load conditions without external trimming. |
| Soft-Start Control | Adjustable via external capacitor on SS pin - prevents inrush current and enables controlled ramp-up even with pre-biased outputs. |
| Thermal Shutdown | 165°C threshold with 35°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
The TPS54229EDDA uses an 8-pin SO PowerPAD™ (DDA) package with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θJA = 45.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connection point between high-side and low-side MOSFETs; requires minimal loop area and Kelvin feedback routing. |
| VBST | Bootstrap supply | Drives high-side gate via 0.1 µF ceramic capacitor to SW; internal diode connects to VREG5 for startup assist. |
| VIN | Main input supply | 4.5–18 V input rail; requires local 10 µF + 0.1 µF decoupling near pins 2 and 4 to ensure stable current limit operation. |
| GND | Power ground | Return path for switching current; must be connected to thermal pad and isolated from analog ground at single point. |
| VFB | Feedback input | Monitors output via resistor divider; 0.765 V reference enables precise output programming with 1% resistors. |
| VREG5 | Internal 5.5 V LDO output | Supplies gate drive and logic; requires 0.47 µF ceramic capacitor to GND; inactive when EN = low. |
| EN | Enable control | Active-high logic input (1.6 V threshold); pull-up required for operation; supports sequencing and standby control. |
| SS | Soft-start timing | 6 µA current source charges external capacitor; enables adjustable start time and pre-biased startup without sinking output. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control | Zero external compensation required; stable with ceramic capacitors as low as 20 µF and ESR < 2 mΩ. |
| Eco-mode™ operation | Enables >85% efficiency at 10 mA load; eliminates audible noise and reduces light-load quiescent current to <10 µA. |
| Pre-biased soft start | Prevents reverse current flow during startup into powered outputs; critical for hot-swap and multi-rail sequencing. |
| Cycle-by-cycle OCP | Valley-current sensing on low-side FET; non-latching trip at 2.5–4.7 A; includes 7-cycle fault counter for robust overload handling. |
| Exposed thermal pad | Direct connection to PCB ground plane via soldered thermal pad; reduces junction-to-board θJB to 16.2°C/W. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player |
|---|---|
Use Scenario: Provides 1.05 V core voltage for MPEG decoder SoC and 3.3 V for HDMI interface ICs under dynamic video decoding loads. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise DC power with fast transient response to handle bursty video processing current demands. Use Value: D-CAP2™ control maintains <1% output deviation during 1-A load steps, eliminating need for large bulk capacitance and reducing BOM cost. |
Use Scenario: Powers laser driver IC and servo controller in optical pickup unit with strict ripple and sequencing requirements. IC Role / Device Role / Timing Role: Secondary buck converter generating 1.8 V and 2.5 V rails from 12 V main supply, synchronized via shared EN signal. Use Value: Pre-biased soft start prevents output collapse during hot insertion of optical modules, ensuring reliable system boot. |
| Home Networking Terminal | Digital Set-Top Box (STB) |
Use Scenario: Supplies 1.2 V to ARM Cortex-A9 processor and 5 V to USB 2.0 PHY in cable modem gateway with limited board space. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator operating in Eco-mode™ during idle periods to meet Energy Star standby power limits. Use Value: Achieves <10 µA shutdown current and >90% efficiency at 100 mA, extending compliance with IEC 62301 standby power standards. |
Use Scenario: Generates 3.3 V for tuner front-end and 1.5 V for QAM demodulator ASIC in dual-tuner STB with thermal constraints. IC Role / Device Role / Timing Role: Thermally optimized buck converter leveraging exposed thermal pad and multiple vias to sustain 2 A output at 85°C ambient. Use Value: Junction-to-board thermal resistance of 16.2°C/W enables full 2-A rating without heatsink, simplifying mechanical design. |
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 D-CAP2™ control, but 1.7-A rating, 3.5-V to 18-V input, and 6-pin SOT-23 package; lacks VREG5 LDO and pre-biased soft start. | Suitable for space-constrained designs where 1.7 A suffices and auxiliary 5.5 V rail is not needed. | Select TPS54227PWP only if output current requirement is ≤1.7 A and VREG5 is unused; otherwise TPS54229EDDA provides higher current headroom and integrated bias supply. |
| MP2307DN-LF-Z | Fixed 500-kHz frequency, no Eco-mode™, 2-A rating, 4.5–23-V input; uses external compensation and requires larger output capacitance. | Better suited for cost-sensitive industrial applications where light-load efficiency is secondary to BOM simplicity. | Choose MP2307DN-LF-Z if fixed-frequency operation and external compensation are acceptable trade-offs for lower unit cost; TPS54229EDDA offers superior transient response and ceramic-capacitor compatibility. |
Compared with TPS54227PWP and MP2307DN-LF-Z, the TPS54229EDDA uniquely combines D-CAP2™ zero-compensation stability, Eco-mode™ light-load optimization, pre-biased soft start, and integrated VREG5-making it the preferred choice for consumer video applications demanding compact size, low ripple, and seamless power sequencing.
Availability
TPS54229EDDA is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc player subsystems, and home networking terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54229EDDA 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-efficiency DC/DC conversion.
The TPS54229EDDA belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for consumer electronics requiring fast transient response, ultra-low ESR capacitor compatibility, and seamless light-to-heavy load efficiency scaling.
FAQ
What is the maximum output current capability of the TPS54229EDDA?
The TPS54229EDDA is rated for 2 A continuous output current under recommended operating conditions (TA = –40°C to 85°C, proper PCB thermal design). Its cycle-by-cycle overcurrent protection triggers at 2.5–4.7 A, and the device sustains full 2-A operation with θJA = 45.3°C/W when the exposed thermal pad is properly soldered to a ground plane. Derating applies above 85°C ambient.
Does the TPS54229EDDA support pre-biased output startup?
Yes, the TPS54229EDDA includes proprietary pre-biased soft-start circuitry. When the output voltage is already present at startup, the controller gradually enables synchronous rectification by incrementing low-side FET on-time cycle-by-cycle-preventing reverse current flow and ensuring smooth ramp-up into regulation without collapsing the pre-biased rail.
What type of output capacitors are compatible with the TPS54229EDDA?
The TPS54229EDDA is explicitly designed for low-ESR ceramic capacitors (20–68 µF typical) and also supports POSCAP/SP-CAP polymer types. Its D-CAP2™ control architecture eliminates the need for ESR-induced ripple, enabling stable operation even with ceramic capacitors having ESR < 2 mΩ-unlike traditional voltage-mode controllers requiring minimum ESR for loop stability.
How does Eco-mode™ improve light-load efficiency in the TPS54229EDDA?
Eco-mode™ in the TPS54229EDDA automatically transitions from continuous conduction mode (CCM) to discontinuous conduction mode (DCM) below ~300 mA load. This reduces switching losses by skipping pulses while maintaining regulation, achieving >85% efficiency at 10 mA and <10 µA shutdown current-critical for meeting Energy Star and IEC 62301 standby power requirements.
What is the function of the VREG5 pin on the TPS54229EDDA?
The VREG5 pin on the TPS54229EDDA is an internally generated 5.5 V LDO output used to power the high-side gate driver and internal logic. It is active only when EN is high, requires a 0.47 µF ceramic capacitor to GND for stability, and features an internal diode connecting to VBST to assist bootstrap capacitor charging during startup.
TPS54229EDDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54229EDDA FAQ
1.How can I place an order for TPS54229EDDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54229EDDA 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 TPS54229EDDA reliable?
The price and inventory of TPS54229EDDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54229EDDA is usually 5 days.
3.What payment methods are accepted for TPS54229EDDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54229EDDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54229EDDA?
TPS54229EDDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54229EDDA 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 TPS54229EDDA?
For technical support, including TPS54229EDDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54229EDDA requirements.
6.How does Aetrix verify that TPS54229EDDA is sourced from the original manufacturer or authorized distributors?
All TPS54229EDDA 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 TPS54229EDDA meets industry standards.
7.What is the process for return or replacement of TPS54229EDDA?
All TPS54229EDDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54229EDDA, 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 TPS54229EDDA part is unused and in its original packaging.
Return procedure for TPS54229EDDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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