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Texas Instruments TPS54527DDAR
- Part No.:
- TPS54527DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54527DDAR.pdf
- Description:
- IC REG BUCK ADJ 5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
TPS54527DDAR 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 adaptive on-time D-CAP2™ mode for fast transient response. It supports 4.5 V to 18 V input, delivers 0.76 V to 6 V output, and runs at 650 kHz switching frequency - used in digital TV power supplies, Blu-ray players, and STB systems.
For engineers reviewing the TPS54527DDAR datasheet, TPS54527DDAR pinout, TPS54527DDAR application, or TPS54527DDAR equivalent, key selection considerations include its D-CAP2 control architecture, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, thermal shutdown at 165°C, and SO PowerPAD® package thermal performance (RθJA = 43.5°C/W).
Technical Context
The TPS54527DDAR implements adaptive on-time PWM control using D-CAP2™ mode, eliminating external compensation while enabling stable operation with ultra-low-ESR ceramic output capacitors. Its internal one-shot timer sets on-time based on VIN and VOUT, yielding pseudo-fixed 650-kHz operation across input voltage range.
It features proprietary pre-biased soft-start that prevents reverse current during startup by incrementally enabling low-side FET conduction, plus valley-current-based cycle-by-cycle overcurrent protection with dual OCL thresholds (7-cycle latch-down behavior) and non-latching thermal shutdown at 165°C with 35°C hysteresis.
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 rails in digital video and networking equipment. |
| Output Voltage Range | 0.76 V to 6 V - programmable via resistor divider; covers CPU core, DDR, and I/O supply requirements. |
| Switching Frequency | 650 kHz - enables compact magnetics and balances efficiency vs. EMI in space-constrained designs. |
| High-Side RDS(on) | 65 mΩ - reduces conduction loss at high duty cycles, improving efficiency above 3.3 V output. |
| Low-Side RDS(on) | 36 mΩ - minimizes synchronous rectification loss, critical for high-current, low-VOUT applications. |
| Shutdown Current | <10 µA - enables ultra-low-power standby modes in always-on consumer electronics. |
| VFB Reference Accuracy | ±1% (751–779 mV over –40°C to 85°C) - ensures tight output regulation without trimming. |
Pinout & Package
TPS54527DDAR is housed in an 8-pin SO PowerPAD® (DDA) package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (RθJC(bot) = 5.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Active-high logic control; must be pulled ≥1.6 V to activate regulator; enables system-level power sequencing. |
| VFB (Pin 2) | Feedback input | Monitors output voltage via resistor divider; 0.765 V reference sets regulation point; sensitive analog node requiring Kelvin connection. |
| VREG5 (Pin 3) | Internal LDO output | 5.5 V bias rail for gate drivers; powers VBST via internal diode; requires 1 µF ceramic capacitor to GND. |
| SS (Pin 4) | Soft-start control | External capacitor sets ramp time; 6 µA charge current enables adjustable startup; supports pre-biased output startup. |
| GND (Pin 5) | Power ground | Switching return path; must connect thermal pad and signal grounds at single point to avoid noise coupling. |
| SW (Pin 6) | Switch node | Connection between high- and low-side FETs; high dv/dt node requiring minimal trace area to reduce EMI. |
| VBST (Pin 7) | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1 µF ceramic capacitor to SW for high-side gate drive. |
| VIN (Pin 8) | Main input supply | Accepts 4.5–18 V; connects to bulk and high-frequency input capacitors placed adjacent to minimize loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables zero-external-compensation design with fast load transient response (<10 µs recovery) and stability with ceramic output caps. |
| Pre-biased soft-start | Prevents reverse current flow into pre-charged output by gradually enabling low-side FET conduction cycle-by-cycle. |
| Cycle-by-cycle overcurrent protection | Valley-current sensing on low-side FET provides accurate current limiting; dual-threshold latching reduces false trips under overload. |
| Integrated 5.5-V VREG5 LDO | Supplies gate drive and internal circuitry; eliminates need for external bias supply; shuts down with EN to reduce quiescent current. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature and resumes only after cooling to ~130°C, preventing thermal runaway in sustained overload. |
| SO PowerPAD® thermal package | Exposed copper pad soldered to PCB ground plane achieves RθJB = 25.6°C/W - critical for maintaining <125°C junction temp at 5 A full load. |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers SoC, memory, and video processing ICs in flat-panel TVs with dynamic backlight dimming and HDMI interface. IC Role / Device Role / Timing Role: Primary 1.05 V/5 A core supply for main processor; regulates tightly during rapid video frame transitions. Use Value: D-CAP2™ control maintains <20 mV output deviation during 0–5 A load steps, eliminating need for large bulk capacitance. | Use Scenario: Supplies 1.2 V/3 A and 3.3 V/2 A rails to BD-ROM controller, audio DAC, and HDMI transmitter in high-definition optical disc players. IC Role / Device Role / Timing Role: Dual-rail generation via multiple TPS54527DDAR units; synchronized soft-start avoids inrush current stacking. Use Value: Pre-biased soft-start prevents voltage droop on shared 3.3 V rail when BD-ROM motor spins up mid-operation. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Delivers 1.8 V/4 A to Wi-Fi/Bluetooth SoC and 5 V/1 A to USB peripherals in residential gateway devices. IC Role / Device Role / Timing Role: High-efficiency buck converter for always-on connectivity subsystem; operates continuously at light load. Use Value: <10 µA shutdown current and <1.4 mA operating quiescent current extend battery backup runtime during AC loss. | Use Scenario: Provides 1.05 V/5 A core voltage to MPEG decoder SoC and 1.8 V/2 A to tuner IC in cable/satellite STBs with instant-on capability. IC Role / Device Role / Timing Role: Main processor supply with fast wake-up from deep sleep; supports <100 ms boot-to-video latency. Use Value: 650 kHz switching frequency allows use of 1.5 µH inductor and 47 µF ceramic output caps - reducing board area by 35% vs. lower-frequency 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 |
|---|---|---|---|
| TPS54528DDAR | Same DDA package, identical pinout, but adds power-good (PG) output and tighter VFB accuracy (±0.5%). | Required where system monitoring demands reliable power-status signaling or tighter regulation tolerance. | Select TPS54528DDAR when PG assertion and ±0.5% VFB accuracy are mandatory; otherwise TPS54527DDAR offers cost and BOM simplicity. |
| MP2359DJ-LF-Z | Monolithic 5 A buck with 4.5–28 V input, fixed 650 kHz, but uses voltage-mode control and lacks pre-biased soft-start. | Suitable for non-pre-biased applications with less stringent transient response; no VREG5 output - requires external bias. | Choose MP2359DJ-LF-Z for higher input voltage margin (up to 28 V) and simpler layout; avoid if pre-biased startup or integrated bias is needed. |
Compared with TPS54527DDAR, TPS54528DDAR adds system-level monitoring capability at minor cost premium, while MP2359DJ-LF-Z trades control sophistication for wider input range and reduced external component count - making each suitable for distinct reliability, feature, or voltage-range priorities.
Availability
TPS54527DDAR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray player subsystems, and networking home terminals requiring stable component supply, long-term production continuity, and automotive-grade reliability screening.
Supply support for TPS54527DDAR 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 TPS54527DDAR belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for space-constrained, high-transient consumer electronics requiring fast regulation without external compensation.
FAQ
What is the recommended input capacitor configuration for TPS54527DDAR?
TI recommends a minimum 10 µF ceramic input capacitor placed adjacent to the TPS54527DDAR VIN and GND pins, plus an optional 0.1 µF high-frequency bypass capacitor. The TPS54527DDAR datasheet specifies these values to suppress high-frequency switching noise and maintain stable input voltage during load transients. Bulk capacitance beyond 10 µF may be added depending on system-level ripple requirements, but the 10 µF ceramic cap is essential for proper TPS54527DDAR operation.
Does TPS54527DDAR support pre-biased output startup?
Yes, the TPS54527DDAR includes proprietary pre-biased soft-start circuitry that prevents reverse current flow into a pre-charged output. During startup, it incrementally increases low-side FET conduction time cycle-by-cycle until reaching normal regulation - ensuring smooth ramp-up without sinking current from downstream circuits. This behavior is confirmed in the TPS54527DDAR datasheet Section 7.3.1 and is a key differentiator versus standard buck controllers.
What is the thermal performance of TPS54527DDAR in its SO PowerPAD® package?
The TPS54527DDAR in the DDA (SO PowerPAD®) package achieves RθJA = 43.5°C/W and RθJC(bot) = 5.2°C/W when the exposed thermal pad is soldered to a solid PCB ground plane. This allows the TPS54527DDAR to sustain 5 A continuous output at ambient temperatures up to 60°C without forced airflow. Thermal design guidelines in the TPS54527DDAR datasheet emphasize via placement under the pad and multi-layer ground planes to realize these ratings.
Can TPS54527DDAR operate with ceramic output capacitors only?
Yes, the TPS54527DDAR is explicitly designed to operate stably with ultra-low-ESR ceramic output capacitors - a core advantage of its D-CAP2™ control architecture. The TPS54527DDAR datasheet confirms compatibility with 22 µF to 68 µF X5R/X7R ceramics and notes that no ESR-induced ripple is required for loop stability. This eliminates the need for aluminum or polymer capacitors, reducing solution size and improving reliability.
What is the function of the VREG5 pin on TPS54527DDAR?
The VREG5 pin on the TPS54527DDAR is an internally generated 5.5 V LDO output used to power the high-side gate driver and internal circuitry. It sources up to 60 mA and requires a 1 µF ceramic capacitor to GND. When EN is low, VREG5 shuts down - contributing to the TPS54527DDAR's sub-10 µA shutdown current. The VREG5 rail also feeds the VBST bootstrap circuit through an internal diode, eliminating the need for an external bias supply.
TPS54527DDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- 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):
- 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
TPS54527DDAR FAQ
1.How can I place an order for TPS54527DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54527DDAR 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 TPS54527DDAR reliable?
The price and inventory of TPS54527DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54527DDAR is usually 5 days.
3.What payment methods are accepted for TPS54527DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54527DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54527DDAR?
TPS54527DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54527DDAR 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 TPS54527DDAR?
For technical support, including TPS54527DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54527DDAR requirements.
6.How does Aetrix verify that TPS54527DDAR is sourced from the original manufacturer or authorized distributors?
All TPS54527DDAR 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 TPS54527DDAR meets industry standards.
7.What is the process for return or replacement of TPS54527DDAR?
All TPS54527DDAR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54527DDAR, 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 TPS54527DDAR part is unused and in its original packaging.
Return procedure for TPS54527DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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