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Texas Instruments TPS56528DDA
- Part No.:
- TPS56528DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS56528DDA.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
TPS56528DDA from Texas Instruments is a 4.5-V to 18-V input, 5-A synchronous step-down DC-DC converter with D-CAP2™ adaptive on-time control, 650-kHz switching frequency, 0.6-V to 7-V adjustable output, and integrated 68-mΩ high-side / 37-mΩ low-side MOSFETs. It delivers stable power in digital TV, STB, and networking terminal power rails.
For engineers reviewing the TPS56528DDA datasheet, TPS56528DDA pinout, TPS56528DDA application, or TPS56528DDA equivalent, key selection considerations include Eco-Mode™ light-load efficiency, prebiased soft start, power good signaling, and SO PowerPAD™ thermal performance across –40°C to 85°C operation.
Technical Context
The TPS56528DDA implements D-CAP2™ control using adaptive on-time modulation-no external compensation required-with internal ramp injection to stabilize regulation under ultra-low-ESR ceramic output capacitors. Its valley-current overcurrent protection monitors low-side FET voltage during conduction, enabling cycle-by-cycle current limiting with 5.5–7.8-A trip threshold.
Advanced Eco-Mode™ enables seamless transition from PWM to discontinuous conduction at light loads, maintaining >85% efficiency down to 10 mA. The device integrates a 5.5-V VREG5 LDO, open-drain PG output with ±10% window, and thermal shutdown at 165°C with 35°C hysteresis-operating without layout-sensitive feedback compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer DC bus rails including 5 V, 12 V, and 15 V systems. |
| Output Current | 5 A continuous - sufficient for core logic rails in SoC-based digital video and networking equipment. |
| Switching Frequency | 650 kHz fixed typical - enables compact magnetics and predictable EMI filtering without oscillator drift. |
| FET RDS(on) | 68 mΩ (HS) / 37 mΩ (LS) - minimizes conduction loss at 5-A load, supporting >90% peak efficiency at mid-load. |
| Feedback Reference | 600 mV ±12 mV (–40°C to 85°C) - ensures tight output regulation accuracy across temperature for precision voltage rails. |
| Soft Start Time | 1 ms internal - prevents inrush current and enables controlled power-up sequencing in multi-rail systems. |
| Shutdown Current | ≤10 µA - meets ultra-low standby power requirements in always-on consumer electronics. |
Pinout & Package
TPS56528DDA uses an 8-pin SO PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to GND for enhanced thermal dissipation (RθJA = 44.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; internal 180–700 kΩ pull-down enables default disable; supports system-level power sequencing. |
| 2 - VFB | Feedback input | Monitors output via resistor divider; 600-mV reference enables precise 0.6–7-V programming; ±0.15 µA input bias minimizes divider error. |
| 3 - VREG5 | 5.5-V LDO output | Supplies gate drive and internal circuitry; requires 0.47-µF ceramic capacitor; inactive when EN = low. |
| 4 - PG | Power good indicator | Open-drain output asserting after 1.7× soft-start time when VOUT is within ±10% of target; sinks up to 4 mA. |
| 5 - GND | Power ground | Common return for SW, VFB, and SS paths; thermal pad must be connected to GND plane for thermal and electrical integrity. |
| 6 - SW | Switch node | Drives external LC filter; connects internally to both MOSFETs; requires 0.1-µF bootstrap capacitor to VBST. |
| 7 - VBST | Bootstrap supply | Charged via internal diode from VREG5; supplies high-side gate driver; capacitor between VBST–SW ensures proper bootstrapping. |
| 8 - VIN | Main input supply | Accepts 4.5–18 V; requires local 10-µF ceramic decoupling; withstands 20-V absolute max transient. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation components while delivering fast transient response (<10 µs recovery) to load steps. |
| Advanced Eco-Mode™ | Enables >88% efficiency at 10 mA load by entering discontinuous conduction mode without audible noise or regulation loss. |
| Prebiased soft start | Prevents reverse current flow during startup into precharged outputs-critical for hot-swap and multi-phase rail sequencing. |
| Integrated power good (PG) | Provides system-level reset and sequencing signal with ±10% detection window and 7-µs UVP delay for reliable fault handling. |
| Thermal and overcurrent protection | Non-latching 165°C thermal shutdown with 35°C hysteresis and valley-current OCP with 7-cycle hiccup recovery. |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
|
Use Scenario: Powers SoC core, memory, and video processing rails in 4K/8K broadcast receivers. IC Role / Device Role / Timing Role: Primary 1.05-V/1.2-V/1.8-V buck regulator delivering up to 5 A with <20-mV ripple. Use Value: D-CAP2™ control maintains regulation during rapid channel-change transients; Eco-Mode™ cuts standby power below 15 mW. |
Use Scenario: Supplies main processor, HDMI PHY, and audio DAC in disc playback units with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency 1.2-V/3.3-V converter operating from 12-V DC adapter input. Use Value: SO PowerPAD™ package achieves 27.8°C/W junction-to-board resistance, enabling fanless enclosure design. |
| Networking Home Terminal | Digital Set-Top Box (STB) |
|
Use Scenario: Powers Ethernet switch ASIC, Wi-Fi baseband, and USB controller in residential gateways. IC Role / Device Role / Timing Role: Input-filtered 5-V-to-1.05-V conversion with PG signaling for firmware boot coordination. Use Value: Prebiased soft start avoids brownout during cold-boot into partially charged downstream rails. |
Use Scenario: Delivers stable 1.05-V core and 3.3-V I/O voltages in cable/satellite STBs with variable input conditions. IC Role / Device Role / Timing Role: Synchronous buck with 650-kHz fSW and ceramic-capacitor compatibility for compact PCB layout. Use Value: 68-mΩ/37-mΩ FETs reduce full-load conduction loss by 35% vs. discrete solutions, lowering board temperature rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS56428DDA | 4-A rated (vs. 5-A), identical D-CAP2™ control, same SO PowerPAD™ package and pinout. | Suitable where peak load ≤4 A; lower current rating reduces conduction loss margin but retains all features. | Select when system max load is confirmed ≤4 A and cost optimization is prioritized over headroom. |
| MP2359DJ-LF-Z | Monolithic 5-A buck with 4.5–24-V input, 340-kHz fSW, no PG output, and different pin assignment (EN on Pin 5). | Lacks power good signaling and prebiased soft start; requires external compensation; lower switching frequency increases inductor size. | Choose only if PG and Eco-Mode™ are non-critical and board space allows larger magnetics. |
Compared with TPS56528DDA, TPS56428DDA offers identical functionality at reduced current capacity-ideal for derated designs-while MP2359DJ-LF-Z trades feature completeness for wider input range and higher voltage tolerance, requiring layout and sequencing redesign.
Availability
TPS56528DDA is available at Aetrix Electronics and suitable for digital TV power supply, STB, and networking home terminal applications requiring stable component supply, long-term lifecycle support, and TI-qualified production-grade reliability.
Supply support for TPS56528DDA 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.
The TPS56528DDA belongs to TI's D-CAP2™ synchronous buck converter family, engineered for cost-sensitive, high-transient consumer electronics where minimal external components and robust light-load efficiency are critical.
FAQ
What is the maximum output current capability of the TPS56528DDA?
The TPS56528DDA delivers up to 5 A continuous output current under recommended operating conditions (TA = –40°C to 85°C, proper PCB layout, and adequate thermal management). Its overcurrent protection triggers at 5.5–7.8 A depending on temperature and inductor value, ensuring safe operation during transient overload events without latch-up.
Does the TPS56528DDA require external compensation components?
No, the TPS56528DDA uses D-CAP2™ adaptive on-time control architecture, which eliminates the need for external compensation networks. This simplifies design, reduces bill-of-materials count, and guarantees stability with ceramic output capacitors-enabling faster time-to-market for consumer power supply designs.
How does the prebiased soft start function work in the TPS56528DDA?
The TPS56528DDA's prebiased soft start detects when the output voltage exceeds the internal soft-start reference at power-up. It then gradually enables the low-side FET with narrow, incrementally widening pulses-preventing reverse current flow and ensuring smooth, controlled ramp-up even into precharged rails without damaging downstream circuitry.
What is the purpose of the VREG5 pin on the TPS56528DDA?
The VREG5 pin on the TPS56528DDA provides a regulated 5.5-V output used to power the internal gate drivers and control circuitry. It requires a 0.47-µF ceramic capacitor to GND and remains inactive when EN is low-enabling clean power sequencing and reducing system-level supply dependencies.
Can the TPS56528DDA operate with ceramic output capacitors only?
Yes, the TPS56528DDA is specifically designed to operate stably with ultra-low-ESR ceramic output capacitors (20–68 µF total), thanks to its D-CAP2™ control and internal ramp compensation. This eliminates the need for bulk electrolytic or POSCAP capacitors, reducing solution size, improving reliability, and lowering output ripple to <20 mV.
TPS56528DDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- 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):
- 0.6V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 5A
- 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
TPS56528DDA FAQ
1.How can I place an order for TPS56528DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56528DDA 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 TPS56528DDA reliable?
The price and inventory of TPS56528DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56528DDA is usually 5 days.
3.What payment methods are accepted for TPS56528DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56528DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56528DDA?
TPS56528DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56528DDA 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 TPS56528DDA?
For technical support, including TPS56528DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56528DDA requirements.
6.How does Aetrix verify that TPS56528DDA is sourced from the original manufacturer or authorized distributors?
All TPS56528DDA 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 TPS56528DDA meets industry standards.
7.What is the process for return or replacement of TPS56528DDA?
All TPS56528DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS56528DDA, 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 TPS56528DDA part is unused and in its original packaging.
Return procedure for TPS56528DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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