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Texas Instruments TPS56528DDAR
- Part No.:
- TPS56528DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS56528DDAR.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
TPS56528DDAR 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 voltage, and integrated 68-mΩ high-side / 37-mΩ low-side MOSFETs. It delivers stable power in digital TV, Blu-ray player, and STB power rails.
For engineers reviewing the TPS56528DDAR datasheet, TPS56528DDAR pinout, TPS56528DDAR application, or TPS56528DDAR equivalent, this page provides verified functional identity, validated SO PowerPAD™ package mapping, confirmed pin roles including open-drain PG and prebiased soft-start capability, and real-world light-load efficiency behavior under Eco-Mode™ operation.
Technical Context
The TPS56528DDAR implements D-CAP2™ control architecture-combining adaptive on-time PWM with internal ripple compensation-to achieve fast transient response without external loop compensation. Its proprietary circuit supports both ceramic and ultra-low-ESR polymer capacitors by synthesizing artificial ripple for stability.
It operates across –40°C to 85°C ambient, uses fixed 1-ms soft-start with prebias handling, and transitions seamlessly between continuous conduction mode (CCM) at heavy loads and advanced Eco-Mode™ discontinuous conduction mode (DCM) at light loads-maintaining sub-10 µA shutdown current and <600 mV VFB reference accuracy over temperature.
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 - enables single-chip supply for SoC core rails or multi-rail subsystems without parallel devices. |
| Switching Frequency | 650 kHz - balances size (smaller inductors/caps) and efficiency while avoiding AM radio band interference. |
| FET RDS(on) | 68 mΩ (HS) / 37 mΩ (LS) - reduces conduction loss and thermal stress in compact 8-pin SO PowerPAD™ layout. |
| VFB Accuracy | ±12 mV (–40°C to 85°C) - ensures ±2% output regulation tolerance across temperature for precision logic supplies. |
| Soft-Start Time | 1 ms (fixed, internal) - prevents inrush current and enables controlled ramp-up even with prebiased outputs. |
| Shutdown Current | <10 µA - meets ultra-low-power standby requirements in always-on consumer electronics. |
Pinout & Package
TPS56528DDAR is housed in an 8-pin SO PowerPAD™ package (4.89 mm × 3.90 mm), with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (RθJB = 27.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | Active-high logic control; internal 180–700 kΩ pull-down allows direct MCU GPIO drive without external resistor. |
| 2 - VFB | Feedback input | Monitors output via resistor divider; 0.6-V reference enables precise 0.6–7-V programming with ±0.15 µA input bias. |
| 3 - VREG5 | 5.5-V LDO output | Supplies gate drive and internal circuitry; requires 0.47-µF ceramic cap to GND and shuts off when EN = low. |
| 4 - PG | Power good indicator | Open-drain output asserts after 1.7× soft-start time when VOUT reaches ±10% of target; sinks up to 4 mA. |
| 5 - GND | Power ground | Common return for SW, VFB, and SS paths; must be connected to thermal pad for optimal thermal performance. |
| 6 - SW | Switch node | Connects HS/LS FETs; drives external LC filter and requires 0.1-µF bootstrap cap to VBST for gate drive integrity. |
| 7 - VBST | Bootstrap supply | Charged via internal diode from VREG5; 0.1-µF ceramic cap to SW sustains high-side gate voltage during duty cycle. |
| 8 - VIN | Main input supply | Accepts 4.5–18 V; feeds internal regulator and power stage; requires local 10-µF ceramic decoupling per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control | Eliminates external compensation components and enables <10-µs load transient response with ceramic output caps. |
| Advanced Eco-Mode™ | Reduces switching losses at light loads by entering skip-cycle DCM-achieving >85% efficiency at 10-mA output. |
| Prebiased Soft Start | Prevents reverse current flow during startup into precharged rails by gradually enabling synchronous rectification. |
| Integrated Power Good | Provides system-level sequencing signal with ±10% VOUT window and 7-µs UVP hiccup delay for reliable power-up. |
| Cycle-by-Cycle OCP | Detects valley current on low-side FET; latches down OCL threshold after 7 consecutive cycles to limit fault energy. |
Applications
| Application 1 | Application 2 |
|---|---|
|
Use Scenario: Core voltage regulation for ARM-based media processors in digital set-top boxes. IC Role / Device Role / Timing Role: Primary 1.05-V/5-A buck converter delivering SoC core power with tight transient response. Use Value: D-CAP2™ control maintains <20-mV output deviation during 0–3-A load steps, eliminating need for large bulk capacitance. |
Use Scenario: Main 3.3-V rail generation in network home terminals with PoE interface. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter operating from 12-V PoE-derived input. Use Value: Eco-Mode™ sustains >90% efficiency at 50-mA standby load, reducing thermal load in sealed enclosures. |
| Application 3 | Application 4 |
|
Use Scenario: HDMI PHY and video decoder power in high-definition Blu-ray Disc™ players. IC Role / Device Role / Timing Role: Low-noise 1.2-V/3-A supply with minimal output ripple for analog-sensitive video circuits. Use Value: Ceramic capacitor compatibility and 650-kHz fixed frequency enable <5-mV peak-to-peak ripple without ESR tuning. |
Use Scenario: Secondary 5-V auxiliary rail in digital TV mainboards supporting USB peripherals and tuners. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing discrete controller + external FET solution. Use Value: Integrated 68-mΩ/37-mΩ FETs reduce BOM count by 6 components and footprint by 35% vs. discrete alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS56524DDAR | 4-A rated (vs. 5-A), identical SO PowerPAD™ package and D-CAP2™ control; lower RDS(on) (60 mΩ/32 mΩ). | Suitable where peak load ≤4 A; slightly higher light-load efficiency but reduced overload margin. | Select when design margin allows 1-A derating and board space is constrained-same layout, no rework needed. |
| MP2359DJ-LF-Z | Monolithic 5-A buck with 4.5–24-V input, 600-kHz fSW, but uses voltage-mode control requiring external compensation. | Lacks prebiased soft start and Eco-Mode™; needs larger output caps for same transient performance. | Choose only if existing design already uses MP2359-based layouts or requires wider input range beyond 18 V. |
Compared with TPS56528DDAR, TPS56524DDAR offers identical integration and control with 1-A lower rating-ideal for cost-optimized 4-A designs-while MP2359DJ-LF-Z trades D-CAP2™ simplicity for extended input range but adds compensation complexity and degrades light-load efficiency.
Availability
TPS56528DDAR is available at Aetrix Electronics and suitable for digital TV power supply, Blu-ray player subsystems, and networking home terminal applications requiring stable component supply, long-term production continuity, and TI-qualified automotive-grade reliability.
Supply support for TPS56528DDAR 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 TPS56528DDAR belongs to TI's D-CAP2™ synchronous buck converter family, engineered for cost-sensitive, space-constrained consumer and industrial power rails demanding fast transient response and zero-compensation design simplicity.
FAQ
What is the maximum output current capability of the TPS56528DDAR?
The TPS56528DDAR is rated for 5-A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Its integrated 68-mΩ high-side and 37-mΩ low-side MOSFETs enable this rating without external FETs. Peak current limit is specified at 5.5–7.8 A depending on inductor value and operating conditions, as confirmed in Section 6.5 of the SLVSBV3B datasheet.
Does the TPS56528DDAR support prebiased output startup?
Yes, the TPS56528DDAR implements proprietary prebiased soft start. When enabled, it avoids sinking current from a precharged output by gradually increasing low-side FET on-time cycle-by-cycle until reaching normal regulation-ensuring smooth, non-disruptive startup. This behavior is documented in Section 7.3.3 and validated in Figure 12 of the SLVSBV3B datasheet.
What package type and thermal characteristics apply to the TPS56528DDAR?
The TPS56528DDAR uses the 8-pin SO PowerPAD™ (DDA) package with 4.89 mm × 3.90 mm body size and exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 27.8°C/W, and the thermal pad must be soldered to a solid GND plane for effective heat transfer-critical for sustaining 5-A operation at elevated ambient temperatures.
How does the TPS56528DDAR achieve high light-load efficiency?
The TPS56528DDAR employs Advanced Auto-Skip Eco-Mode™, which disables switching cycles during light loads to minimize gate drive and switching losses. This extends battery life and reduces thermal load in standby modes-verified to deliver <85% efficiency at 10-mA output, as shown in Figure 7 of the SLVSBV3B datasheet.
Is an external compensation network required for the TPS56528DDAR?
No, the TPS56528DDAR uses D-CAP2™ adaptive on-time control, which embeds internal compensation and eliminates the need for external RC networks. Stability is maintained across ceramic and low-ESR polymer capacitors without loop tuning-enabling rapid design iteration and reducing BOM count by up to four passive components.
TPS56528DDAR 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):
- 0.6V
- 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
TPS56528DDAR FAQ
1.How can I place an order for TPS56528DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS56528DDAR 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 TPS56528DDAR reliable?
The price and inventory of TPS56528DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS56528DDAR is usually 5 days.
3.What payment methods are accepted for TPS56528DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS56528DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS56528DDAR?
TPS56528DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS56528DDAR 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 TPS56528DDAR?
For technical support, including TPS56528DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS56528DDAR requirements.
6.How does Aetrix verify that TPS56528DDAR is sourced from the original manufacturer or authorized distributors?
All TPS56528DDAR 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 TPS56528DDAR meets industry standards.
7.What is the process for return or replacement of TPS56528DDAR?
All TPS56528DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS56528DDAR, 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 TPS56528DDAR part is unused and in its original packaging.
Return procedure for TPS56528DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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