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Texas Instruments TPS54229EDDAR
- Part No.:
- TPS54229EDDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54229EDDAR.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
TPS54229EDDAR 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 down to <10 μA shutdown current. It delivers regulated output voltages from 0.76 V to 7.0 V across 4.5–18 V input range and is used in digital TV power supplies and Blu-ray disc player core rails.
For engineers reviewing the TPS54229EDDAR datasheet, TPS54229EDDAR pinout, TPS54229EDDAR application, or TPS54229EDDAR equivalent, key selection criteria include its D-CAP2™ transient response capability, compatibility with ceramic output capacitors, thermal pad–enabled thermal management in the HSOP-8 (DDA) package, and pre-biased soft-start functionality for reliable system startup.
Technical Context
The TPS54229EDDAR implements D-CAP2™ mode control-a proprietary adaptive on-time architecture that eliminates external compensation while supporting both low-ESR ceramic and polymer output capacitors. Its internal one-shot timer sets on-time inversely proportional to VIN and proportional to VOUT, enabling stable pseudo-constant 650-kHz operation without an oscillator.
Eco-mode™ enables automatic pulse-skipping at light loads, reducing quiescent current to <10 μA in shutdown and maintaining >90% efficiency at 10 mA output. Cycle-by-cycle overcurrent protection monitors low-side FET voltage drop, while thermal shutdown triggers at 165°C with 35°C hysteresis-both non-latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus inputs including 5 V, 12 V, and 15 V rails. |
| Output Voltage Range | 0.76 V to 7.0 V - programmable via resistor divider; 0.765 V reference enables precise low-voltage core regulation. |
| Continuous Output Current | 2 A - sustained delivery with integrated FETs; peak current limit 2.5–4.7 A ensures robust overload handling. |
| Switching Frequency | 650 kHz - pseudo-constant frequency set by adaptive on-time; enables compact LC filter design with ≤22 µH inductors. |
| High-Side RDS(on) | 160 mΩ - reduces conduction loss at high duty cycles; optimized for 1.05–3.3 V outputs with VIN ≥ 12 V. |
| Low-Side RDS(on) | 110 mΩ - minimizes synchronous rectification loss during discontinuous conduction mode in Eco-mode™. |
| Shutdown Current | <10 μA - enables ultra-low-power standby in battery-backed or always-on systems. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor PCB thermal design; 35°C hysteresis prevents oscillation. |
Pinout & Package
The TPS54229EDDAR uses the 8-pin HSOP PowerPAD™ (DDA) package with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (θJA = 45.3°C/W). The package is RoHS-compliant, NIPDAU/Sn-finished, and MSL Level-2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VBST | Bootstrap supply for high-side gate driver | Connect 0.1 µF ceramic capacitor between VBST and SW; internal diode charges VBST from VREG5 during low-side conduction. |
| 2 - VIN | Main input power supply | 4.5–18 V input; requires local 10 µF + 0.1 µF ceramic decoupling close to pins 2 and 4 to ensure stable current limit operation. |
| 3 - SW | Switch node | Connection point between high- and low-side FETs; must be minimized in area/length to reduce EMI and ringing. |
| 4 - GND | Power ground return | Single-point connection point for SS and VFB analog returns; thermal pad must be soldered directly to PGND plane. |
| 5 - VFB | Feedback input | Monitors output voltage via resistor divider; 0.765 V reference with ±16 mV accuracy at 25°C enables tight regulation. |
| 6 - VREG5 | 5.5 V LDO output | Internal regulator powers gate drivers; requires 0.47 µF ceramic capacitor to GND; inactive when EN = low. |
| 7 - EN | Enable control | Active-high logic input (1.6 V threshold); pull-up required for operation; UVLO tied to VREG5 voltage (3.75 V threshold). |
| 8 - SS | Soft-start timing | 6 µA current source charges external capacitor; enables adjustable ramp time and pre-biased startup without sinking output current. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation components and enables fast load-transient response (<10 µs recovery) with ceramic output capacitors. |
| Eco-mode™ auto-skip operation | Maintains >85% efficiency at 10 mA load and reduces quiescent current to <10 μA in shutdown-critical for energy-sensitive applications. |
| Pre-biased soft-start | Prevents reverse current flow during startup into pre-charged outputs by incrementally enabling low-side FET conduction cycle-by-cycle. |
| Integrated 160 mΩ / 110 mΩ FETs | Enables full 2-A operation without external switches; optimized RDS(on) ratio improves efficiency across 0.76–7.0 V output range. |
| Cycle-by-cycle overcurrent protection | Monitors low-side FET voltage drop with temperature compensation; non-latching trip with dual-threshold (high/low OCL) for graceful fault recovery. |
| Exposed thermal pad (DDA package) | Reduces θJA by up to 29°C/W vs. standard SOIC; requires direct solder connection to PGND plane with ≥6 thermal vias for rated performance. |
Applications
| Digital TV Power Supply | Blu-ray Disc Player Core Rail |
|---|---|
Use Scenario: Provides 1.2 V/1.8 V/3.3 V rails for SoC, memory, and video processing ICs in flat-panel TV mainboards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable, low-noise core voltage with fast transient response to dynamic CPU/GPU load steps. Use Value: D-CAP2™ control maintains <1% output deviation under 1-A step load changes; ceramic capacitor compatibility reduces board area by 40% vs. electrolytic solutions. |
Use Scenario: Generates 1.05 V and 1.2 V supplies for BD-ROM controller and HDMI transmitter ICs in optical disc players. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating in Eco-mode™ during standby and PWM mode during playback. Use Value: Achieves >92% efficiency at 500 mA and <10 μA shutdown current-extending standby battery life in portable BD players. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Powers Ethernet PHY, Wi-Fi SoC, and security coprocessor in residential gateways and mesh routers. IC Role / Device Role / Timing Role: Secondary buck converter supplying isolated 3.3 V I/O rail with tight regulation and low EMI for signal integrity. Use Value: 650-kHz switching frequency allows use of small 22 µH inductors; SW node layout guidance minimizes radiated emissions in FCC/CE-constrained enclosures. |
Use Scenario: Delivers 1.05 V core and 3.3 V I/O voltages to MPEG decoder, tuner, and conditional access modules in cable/satellite STBs. IC Role / Device Role / Timing Role: Main DC/DC regulator with pre-biased soft-start ensuring glitch-free boot after power cycling or firmware updates. Use Value: Pre-biased startup avoids output voltage collapse during hot-plug events; VFB accuracy (±16 mV) ensures compliance with SoC voltage tolerance specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54227PDDAR | Same DDA package and D-CAP2™ control, but 1.5-A rating, lower 180 mΩ/130 mΩ RDS(on), and fixed 600-kHz frequency. | Suitable for lower-current applications where 2-A headroom is unnecessary; slightly reduced light-load efficiency due to absence of Eco-mode™. | Select when cost sensitivity outweighs need for 2-A capacity or Eco-mode™ efficiency at sub-100 mA loads. |
| MP2315DJ-LF-Z | Monolithic 2-A buck with 4.5–28 V input, 600-kHz fixed frequency, no Eco-mode™, and 150 mΩ/100 mΩ FETs. | Lacks pre-biased soft-start and D-CAP2™ transient response; requires external compensation; higher max input voltage expands use in 24 V industrial systems. | Choose for 24 V input environments or where fixed-frequency EMI filtering is preferred over adaptive on-time behavior. |
Compared with TPS54229EDDAR, TPS54227PDDAR offers lower cost and identical footprint but sacrifices 0.5-A output and Eco-mode™ efficiency; MP2315DJ-LF-Z extends input range to 28 V but lacks D-CAP2™'s capacitor flexibility and fast transient capability-making TPS54229EDDAR optimal for consumer electronics requiring compact, high-dynamic-response 2-A regulation.
Availability
TPS54229EDDAR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray disc player core rails, and networking home terminal designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS54229EDDAR 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 TPS54229E product line delivers cost-effective, low-component-count synchronous buck converters for consumer electronics, designed specifically for fast transient response, ceramic capacitor compatibility, and Eco-mode™ light-load efficiency in space-constrained applications.
FAQ
What is the maximum continuous output current supported by the TPS54229EDDAR?
The TPS54229EDDAR supports 2 A of continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Its cycle-by-cycle overcurrent protection activates at 2.5–4.7 A, and thermal shutdown engages at 165°C junction temperature-ensuring safe operation within this rating. Derating is required above 85°C ambient or with insufficient copper area on the thermal pad.
Does the TPS54229EDDAR support pre-biased output startup?
Yes, the TPS54229EDDAR includes dedicated pre-biased soft-start circuitry. When the output voltage is already present at startup, the device incrementally enables low-side FET conduction-avoiding reverse current flow and preventing output voltage collapse. This feature is implemented in hardware and requires no external configuration beyond standard SS capacitor placement.
What type of output capacitors are compatible with the TPS54229EDDAR?
The TPS54229EDDAR is explicitly designed for low-ESR output capacitors-including X5R/X7R ceramic types (20–68 µF total), POSCAP, and SP-CAP polymer capacitors. Its D-CAP2™ control loop remains stable even with near-zero ESR, eliminating the need for intentional ESR in the output filter and enabling smaller, more reliable capacitor solutions.
How does Eco-mode™ improve light-load efficiency in the TPS54229EDDAR?
Eco-mode™ in the TPS54229EDDAR enables automatic pulse-skipping during light loads, reducing switching losses and gate drive current. This lowers quiescent current to <10 μA in shutdown and maintains >85% efficiency at 10 mA output-significantly outperforming forced-PWM alternatives in standby or intermittent-operation scenarios typical in consumer electronics.
What is the purpose of the exposed thermal pad on the TPS54229EDDAR DDA package?
The exposed thermal pad on the TPS54229EDDAR's DDA package must be soldered to the PCB's power ground plane to achieve specified thermal performance (θJA = 45.3°C/W). It serves as the primary heat conduction path-reducing junction-to-board thermal resistance to 8.5°C/W-and requires ≥6 thermal vias to an internal or bottom-layer copper pour for optimal dissipation in 2-A operation.
TPS54229EDDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm 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):
- 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
TPS54229EDDAR FAQ
1.How can I place an order for TPS54229EDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54229EDDAR 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 TPS54229EDDAR reliable?
The price and inventory of TPS54229EDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54229EDDAR is usually 5 days.
3.What payment methods are accepted for TPS54229EDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54229EDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54229EDDAR?
TPS54229EDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54229EDDAR 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 TPS54229EDDAR?
For technical support, including TPS54229EDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54229EDDAR requirements.
6.How does Aetrix verify that TPS54229EDDAR is sourced from the original manufacturer or authorized distributors?
All TPS54229EDDAR 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 TPS54229EDDAR meets industry standards.
7.What is the process for return or replacement of TPS54229EDDAR?
All TPS54229EDDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54229EDDAR, 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 TPS54229EDDAR part is unused and in its original packaging.
Return procedure for TPS54229EDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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