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Texas Instruments TPS54525PWPR
- Part No.:
- TPS54525PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54525PWPR.pdf
- Description:
- IC REG BUCK ADJ 5.5A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,272
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Product details
Overview
TPS54525PWPR from Texas Instruments is a 5.5-A synchronous step-down DC/DC converter with D-CAP2™ adaptive on-time control, operating from 4.5 V to 18 V input and delivering adjustable output from 0.76 V to 5.5 V. It integrates 63 mΩ high-side and 33 mΩ low-side N-channel MOSFETs, supports 650-kHz switching, and delivers power-good signaling for digital TV and STB power rails.
For engineers reviewing the TPS54525PWPR datasheet, TPS54525PWPR pinout, TPS54525PWPR application, or TPS54525PWPR equivalent, key selection considerations include its D-CAP2™ fast transient response, pre-biased soft-start capability, cycle-by-cycle overcurrent protection, and HTSSOP-14 thermal performance in space-constrained consumer power designs.
Technical Context
The TPS54525PWPR implements adaptive on-time D-CAP2™ control-no external compensation required-using VIN and VOUT to dynamically set on-time for pseudo-fixed 650-kHz operation. Its internal ramp simulates output ripple, enabling stable regulation with ceramic capacitors.
It features forced continuous conduction mode (FCCM), integrated 5.5-V VREG5 LDO for internal logic and external bias, output discharge via 50-Ω internal FET, and non-latching protections including OVP (125% trip), UVP (65% trip), UVLO (3.61 V wake-up), and thermal shutdown at 165°C.
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 supplies. |
| Output Current | 5.5 A continuous - sufficient for core voltage rails in SoC-based digital TV, Blu-ray, and STB applications. |
| Switching Frequency | 650 kHz - enables compact magnetics and predictable EMI filtering without oscillator drift. |
| High/Low-Side RDS(on) | 63 mΩ / 33 mΩ - optimized conduction loss for mid-duty-cycle operation (e.g., 1.05 V @ 12 VIN). |
| Feedback Reference | 0.765 V ±9 mV - high-accuracy bandgap reference enabling tight output regulation across temperature. |
| Shutdown Current | <10 μA - minimizes standby power in always-on consumer electronics with sleep-mode requirements. |
| Soft-Start Control | Adjustable via external capacitor - prevents inrush current and enables controlled ramp-up into pre-biased outputs. |
Pinout & Package
TPS54525PWPR is housed in a thermally enhanced 14-pin HTSSOP package (5.00 mm × 6.40 mm) with exposed PowerPAD™ for PCB-level heat dissipation. The package supports –40°C to +85°C ambient operation and requires soldering the PowerPAD™ to PGND for optimal thermal performance (θJA = 43.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output node connection | Provides regulated output voltage; also enables internal discharge path to PGND when EN is low. |
| VFB (Pin 2) | Feedback input | Senses output via resistor divider; threshold is 0.765 V with ±9 mV accuracy over temperature. |
| VREG5 (Pin 3) | Internal 5.5-V LDO output | Supplies internal circuitry and can bias external components; requires 1-μF decoupling to PGND. |
| SS (Pin 4) | Soft-start timing control | Charged by 6-μA internal current source; sets startup ramp time and enables pre-biased start-up. |
| GND (Pin 5) | Signal ground reference | Reference for control logic; must be tightly coupled to PGND near IC for noise immunity. |
| PG (Pin 6) | Open-drain power-good signal | Asserts high after 1.7× soft-start time when VOUT is within ±10%; requires external pull-up to VREG5 (25–150 kΩ). |
| EN (Pin 7) | Enable input | Active-high logic control; internal 220–880 kΩ pull-down ensures default disable if left floating. |
| PGND1/PGND2 (Pins 8,9) | Power ground returns | Low-side MOSFET source connections and current-sense inputs; must be joined to GND at single point near IC. |
| SW1/SW2 (Pins 10,11) | Switch node terminals | Connect to inductor; carry high di/dt; require short, low-inductance routing to minimize ringing. |
| VBST (Pin 12) | Bootstrap supply for high-side gate driver | Requires ceramic capacitor (typically 0.1 μF) from VBST to SW1/SW2; internally diode-clamped to VREG5. |
| VIN1/VIN2 (Pins 13,14) | Main input power connections | Parallel inputs for reduced trace resistance; connect directly to bulk input capacitor with low-ESR path. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Eliminates external compensation while maintaining stability with ceramic or polymer output capacitors. |
| Pre-biased soft start | Prevents reverse current flow during startup into pre-charged outputs-critical for multi-rail systems. |
| Integrated 5.5-V VREG5 LDO | Reduces BOM count by powering internal logic and enabling external bias without secondary regulator. |
| Cycle-by-cycle overcurrent limit | Detects low-side switch voltage during conduction to protect against sustained overload without latch-up. |
| Output discharge function | Activates internal 50-Ω FET to safely bleed output capacitance when disabled-essential for sequencing compliance. |
Applications
| Digital Television Power Supply | High-Definition Blu-ray Disc™ Player |
|---|---|
Use Scenario: Supplies 1.05 V core voltage to SoC and 3.3 V I/O rail in slim-profile flat-panel TV mainboards. IC Role / Device Role / Timing Role: Primary buck regulator delivering 5.5 A at 1.05 V with <7 mVPP ripple under full load. Use Value: D-CAP2™ fast transient response maintains regulation during dynamic SoC load steps without added bulk capacitance. | Use Scenario: Powers video decoder, HDMI PHY, and flash memory in BD player mainboard with strict thermal limits. IC Role / Device Role / Timing Role: Synchronous step-down converter generating 1.2 V and 1.8 V rails from 12 V input. Use Value: FCCM mode ensures constant 650-kHz switching frequency, simplifying EMI filter design and reducing audible noise. |
| Digital Set-Top Box (STB) | Networking Home Terminal |
Use Scenario: Delivers 1.1 V CPU core and 2.5 V DDR interface voltage in cable/satellite STBs with standby power constraints. IC Role / Device Role / Timing Role: High-efficiency buck regulator supporting both active and deep-sleep modes. Use Value: <10 μA shutdown current and adjustable soft start meet Energy Star and CEC standby power requirements. | Use Scenario: Provides 3.3 V and 5 V rails for Ethernet PHY, Wi-Fi module, and microcontroller in residential gateway devices. IC Role / Device Role / Timing Role: Dual-output capable buck controller (with external feedback resistors) managing multiple voltage domains. Use Value: Power-good output enables safe sequencing with FPGA or PMIC, preventing configuration errors during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54526PWPR | Same pinout and electrical specs, but rated for –40°C to 125°C junction temperature and includes enhanced thermal protection. | Required for extended-temperature industrial or automotive cabin applications where ambient exceeds 85°C. | Select TPS54526PWPR only when operating junction temperature may exceed 150°C or when tighter thermal hysteresis is needed. |
| MP2359DJ-LF-Z | 4.5–18 V input, 5 A output, fixed 650 kHz frequency, but uses voltage-mode PWM with external compensation and no VREG5 LDO. | Lacks integrated bias rail and pre-biased soft start-requires additional components for same functionality. | Choose MP2359DJ-LF-Z only when cost sensitivity outweighs BOM reduction and design simplicity benefits of TPS54525PWPR. |
Compared with TPS54525PWPR, TPS54526PWPR offers extended temperature range and improved thermal robustness without layout changes, while MP2359DJ-LF-Z trades integration for lower unit cost but increases design complexity and component count.
Availability
TPS54525PWPR is available at Aetrix Electronics and suitable for digital TV power supply, high-definition Blu-ray Disc™ player, and digital set-top box (STB) applications requiring stable component supply, long-term production continuity, and guaranteed traceability.
Supply support for TPS54525PWPR 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies.
The TPS54525PWPR belongs to TI's D-CAP2™ synchronous buck converter product line, designed specifically for high-efficiency, low-component-count DC/DC conversion in space-constrained consumer electronics with fast dynamic loads.
FAQ
What is the recommended input capacitor for TPS54525PWPR in a 12-V input, 1.05-V/5.5-A application?
A minimum 47-μF low-ESR ceramic or POSCAP input capacitor is recommended for TPS54525PWPR in this configuration. Place it as close as possible to VIN1/VIN2 pins with short, wide traces to minimize loop inductance. TI's typical application uses two 22-μF X5R ceramics in parallel, achieving <50 mVPP input ripple at full load per Figure 6-12 of the datasheet.
Does TPS54525PWPR support forced continuous conduction mode (FCCM), and how is it enabled?
Yes, TPS54525PWPR operates in forced continuous conduction mode (FCCM) by default-no external configuration is required. FCCM maintains ~650-kHz switching across all load conditions, including light load, enabling predictable EMI and stable output ripple at the expense of slightly reduced light-load efficiency. This behavior is inherent to the device's control architecture.
Can TPS54525PWPR safely start into a pre-biased output, and what design precautions apply?
Yes, TPS54525PWPR supports pre-biased soft start via an internal circuit that incrementally activates the low-side FET to avoid sinking current from the pre-charged output. To ensure reliable operation, keep the SS capacitor value within the recommended 1–10 nF range and avoid excessive feedback divider impedance (>1 MΩ) that could degrade VFB noise immunity during startup.
What is the maximum allowable output capacitance for TPS54525PWPR, and does it affect stability?
TPS54525PWPR has no hard upper limit on output capacitance, but TI recommends 22–68 μF total ceramic capacitance for optimal phase margin with D-CAP2™ control. Excessive capacitance (>220 μF) without series ESR may reduce phase margin and cause instability; however, the device's internal ramp compensation maintains stability across typical ceramic values used in digital TV and STB designs.
How does the power-good (PG) signal of TPS54525PWPR behave during undervoltage events?
The PG signal of TPS54525PWPR goes low when the feedback voltage falls below 65% of the target output (e.g., <0.68 V for a 1.05-V rail), after a 250-μs delay. It remains latched low until the output recovers and soft-start completes again. PG is open-drain and requires a pull-up resistor (25–150 kΩ) to VREG5; it asserts high only after 1.7× soft-start time with output within ±10% of regulation.
TPS54525PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm 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):
- 5.5V
- Current - Output:
- 5.5A
- Frequency - Switching:
- 650kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
TPS54525PWPR FAQ
1.How can I place an order for TPS54525PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54525PWPR 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 TPS54525PWPR reliable?
The price and inventory of TPS54525PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54525PWPR is usually 5 days.
3.What payment methods are accepted for TPS54525PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54525PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54525PWPR?
TPS54525PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54525PWPR 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 TPS54525PWPR?
For technical support, including TPS54525PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54525PWPR requirements.
6.How does Aetrix verify that TPS54525PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54525PWPR 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 TPS54525PWPR meets industry standards.
7.What is the process for return or replacement of TPS54525PWPR?
All TPS54525PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54525PWPR, 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 TPS54525PWPR part is unused and in its original packaging.
Return procedure for TPS54525PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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