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Texas Instruments TPS54527DDA
- Part No.:
- TPS54527DDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54527DDA.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:969
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Product details
Overview
TPS54527DDA from Texas Instruments is a 5-A synchronous step-down DC/DC converter with integrated high-side (65 mΩ) and low-side (36 mΩ) N-channel MOSFETs, operating in D-CAP2™ adaptive on-time mode for fast transient response. It accepts 4.5 V to 18 V input and delivers adjustable 0.76 V to 6 V output, targeting power rails in digital TV, Blu-ray players, and networking terminals.
For engineers reviewing the TPS54527DDA datasheet, TPS54527DDA pinout, TPS54527DDA application, or TPS54527DDA equivalent, key selection criteria include its 650-kHz pseudo-fixed switching frequency, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, and compatibility with ultra-low-ESR ceramic output capacitors without external compensation.
Technical Context
The TPS54527DDA implements D-CAP2™ control architecture-combining adaptive on-time PWM with internal ripple injection-to achieve stable regulation with zero external compensation components. Its feedback loop references a 0.765-V bandgap voltage with ±6 mV accuracy over temperature.
It integrates dual N-FETs with RDS(on) of 65 mΩ (high-side) and 36 mΩ (low-side), supports pre-biased startup via valley-current-controlled synchronous rectification ramp-up, and uses VREG5 (5.5-V LDO) to power internal circuitry and bootstrap capacitor charging through an internal diode.
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 Current | 5 A continuous - sufficient for core logic supplies in SoC-based systems like STBs and media processors. |
| Output Voltage Range | 0.76 V to 6 V - programmable via resistor divider; enables direct generation of 1.05 V, 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V rails. |
| Switching Frequency | 650 kHz nominal - balances efficiency, size, and EMI; frequency varies adaptively with VIN/VOUT ratio. |
| Feedback Reference | 0.765 V ±6 mV - high-accuracy reference ensures tight output regulation across –40°C to 85°C. |
| Shutdown Current | <10 µA - enables ultra-low-power standby in always-on consumer electronics. |
| Thermal Shutdown | 165°C threshold with 35°C hysteresis - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
TPS54527DDA is housed in an 8-pin SO PowerPAD™ (DDA) package measuring 4.89 mm × 3.90 mm with an exposed thermal pad on the underside, requiring solder connection to PCB ground plane for thermal management and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic input; must be pulled ≥1.6 V to activate regulator; <0.6 V disables device and reduces IIN to <10 µA. |
| VFB (Pin 2) | Feedback sensing node | Monitors output voltage via resistor divider; internal 0.765-V reference sets regulation point; sensitive analog input requiring Kelvin grounding. |
| VREG5 (Pin 3) | Internal LDO output | 5.5-V regulated supply for gate drivers and bias circuits; requires 1-µF ceramic capacitor to GND; inactive when EN = low. |
| SS (Pin 4) | Soft-start timing node | Charged by 6-µA current source; external capacitor sets ramp time; supports pre-biased startup without sinking output current. |
| GND (Pin 5) | Power ground return | Primary return for switching currents; thermal pad must be connected to this node via multiple vias for thermal and EMI performance. |
| SW (Pin 6) | Switch node | Connection between high- and low-side FETs; carries high di/dt; must be minimized in area to reduce parasitic inductance and radiated noise. |
| VBST (Pin 7) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-µF ceramic capacitor to SW for high-side gate drive; critical for proper FET turn-on. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18 V; feeds both power stage and internal regulators; requires local 10-µF ceramic decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Enables stable operation with ceramic output capacitors and eliminates need for external compensation network. |
| Pre-Biased Soft Start | Prevents reverse current flow during startup when output is already biased; avoids system reset or rail collapse. |
| Cycle-by-Cycle Overcurrent Protection | Detects low-side FET voltage during conduction; non-latching, temperature-compensated, with dual-threshold recovery. |
| Integrated Power FETs | 65 mΩ high-side + 36 mΩ low-side MOSFETs optimized for 12-V input / 1–3.3-V output applications. |
| Adjustable Soft-Start Time | Set externally via SS-to-GND capacitor; typical ramp time = 1.1 × CSS(nF) / 6 µA (e.g., 100 nF → ~18 ms). |
Applications
| Digital TV Power Supply | High Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Supplies 1.05 V core voltage to MPEG decoder SoC under dynamic video decoding load. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated 5-A peak current with sub-20-mV ripple. Use Value: D-CAP2™'s fast transient response maintains output within ±1% during 0–3 A load steps, eliminating need for large bulk capacitance. | Use Scenario: Powers HDMI transmitter IC and servo motor controller from shared 12-V input rail. IC Role / Device Role / Timing Role: Dual-rail generator (1.2 V + 3.3 V) using two TPS54527DDA instances with independent feedback dividers. Use Value: Pre-biased soft start prevents brownout when 3.3-V rail powers auxiliary logic before main SoC boots. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Provides 1.8 V I/O supply to Ethernet PHY and 2.5 V memory interface in residential gateway. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating at 650 kHz to minimize filter size near RF-sensitive sections. Use Value: 650-kHz switching allows compact 1.5-µH inductor and 47-µF ceramic output cap, reducing board area by >30% vs lower-frequency alternatives. | Use Scenario: Generates 5 V USB peripheral rail and 1.05 V processor core rail from 12-V adapter input. IC Role / Device Role / Timing Role: Main system power manager with enable sequencing and thermal foldback during ambient temperature rise. Use Value: Thermal shutdown at 165°C with 35°C hysteresis ensures graceful degradation during enclosure overheating, avoiding sudden system failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54528DDA | Same pinout and package; higher current limit (6.4 A typ); identical D-CAP2™ control and features. | Supports higher peak loads in same footprint; no layout change required. | Select when 5-A margin is insufficient and 6-A headroom is needed for burst-mode operation. |
| MP2359DJ-LF-Z | 4.5–28 V input; 5-A rating; constant-on-time control; no integrated VREG5; different pinout (8-pin SOIC). | Requires external bias supply; lacks pre-biased soft start and VREG5 bootstrap path. | Choose only if wider input range (up to 28 V) is mandatory and VREG5 functionality is not required. |
Compared with TPS54527DDA, TPS54528DDA offers higher current capability in identical packaging and control architecture, while MP2359DJ-LF-Z trades integrated bias generation and startup robustness for extended input voltage range and alternate topology.
Availability
TPS54527DDA is available at Aetrix Electronics and suitable for digital TV power supply, Blu-ray player subsystems, and networking home terminal designs requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade reliability.
Supply support for TPS54527DDA 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-reliability DC/DC conversion solutions.
The TPS545xx family was designed specifically for cost-sensitive, space-constrained consumer and industrial applications requiring high efficiency, fast transient response, and minimal external components-especially where ceramic output capacitors are preferred.
FAQ
What is the recommended input capacitor configuration for TPS54527DDA?
TI recommends a minimum 10-µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and GND pins of the TPS54527DDA, supplemented by an optional 0.1-µF high-frequency ceramic capacitor. The TPS54527DDA datasheet specifies that total input capacitance must withstand 100-mV ripple at full load, and voltage rating must exceed maximum input (≥20 V). Layout best practices require short, wide traces to minimize loop inductance.
Does TPS54527DDA support pre-biased output startup?
Yes, the TPS54527DDA supports pre-biased soft start via proprietary valley-current-controlled ramp-up of synchronous rectification. When the output voltage exceeds the soft-start target at power-on, the controller initiates low-side FET gating with narrow pulses and incrementally increases on-time until reaching normal duty cycle-preventing reverse current flow and ensuring monotonic VOUT rise. This behavior is confirmed in Section 7.3.1 of the TPS54527DDA datasheet.
What is the thermal pad connection requirement for TPS54527DDA?
The exposed thermal pad on the underside of the TPS54527DDA DDA package must be soldered directly to a PCB copper area connected to the power ground (PGND) plane using ≥4 thermal vias (0.3-mm diameter minimum). TI specifies this connection as mandatory-not optional-for achieving the rated 5-A output current and maintaining junction temperature below 150°C under full load. Failure to connect the pad degrades thermal resistance by >30°C/W.
Can TPS54527DDA operate with only ceramic output capacitors?
Yes, the TPS54527DDA is explicitly designed for ceramic output capacitors, enabled by its D-CAP2™ control architecture and internal ripple injection circuitry. The datasheet confirms stable operation with 22–68 µF total ceramic capacitance (e.g., two 22-µF X5R 0805s), eliminating need for electrolytic or polymer caps. Ceramic use reduces board area, improves reliability, and enables sub-20-mV output ripple at 5-A load.
What is the function of the VREG5 pin on TPS54527DDA?
The VREG5 pin on the TPS54527DDA is a 5.5-V internal LDO output that powers internal gate drivers and bias circuitry. It sources up to 60 mA and requires a 1-µF ceramic capacitor to GND. Critically, VREG5 also supplies the bootstrap capacitor (via internal diode to VBST) for high-side FET drive. When EN is low, VREG5 shuts down-disabling all internal functions and reducing quiescent current to <10 µA.
TPS54527DDA 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):
- 6V
- 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
TPS54527DDA FAQ
1.How can I place an order for TPS54527DDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54527DDA 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 TPS54527DDA reliable?
The price and inventory of TPS54527DDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54527DDA is usually 5 days.
3.What payment methods are accepted for TPS54527DDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54527DDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54527DDA?
TPS54527DDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54527DDA 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 TPS54527DDA?
For technical support, including TPS54527DDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54527DDA requirements.
6.How does Aetrix verify that TPS54527DDA is sourced from the original manufacturer or authorized distributors?
All TPS54527DDA 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 TPS54527DDA meets industry standards.
7.What is the process for return or replacement of TPS54527DDA?
All TPS54527DDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54527DDA, 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 TPS54527DDA part is unused and in its original packaging.
Return procedure for TPS54527DDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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