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Texas Instruments TPS54526PWPR
- Part No.:
- TPS54526PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54526PWPR.pdf
- Description:
- IC REG BUCK ADJ 5.5A 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,555
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Product details
Overview
TPS54526PWPR from Texas Instruments is a 5.5-A synchronous step-down DC/DC converter with D-CAP2™ control architecture, operating from 4.5 V to 18 V input and delivering adjustable output voltage 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 features Eco-mode™ for high efficiency at light loads-used in digital TV power supplies and Blu-ray Disc™ players.
For engineers reviewing the TPS54526PWPR datasheet, TPS54526PWPR pinout, TPS54526PWPR application, or TPS54526PWPR equivalent, key selection considerations include adaptive on-time transient response, pre-biased soft start capability, power good (PG) open-drain output, cycle-by-cycle overcurrent protection, and thermal shutdown at 165°C.
Technical Context
The TPS54526PWPR implements D-CAP2™ mode control using adaptive on-time PWM, eliminating external compensation while enabling fast load-transient response. Its proprietary circuit supports ultra-low-ESR ceramic and polymer output capacitors without requiring ESR-induced ripple for stability.
It operates in seamless transition between continuous conduction mode (CCM) at higher loads and discontinuous conduction mode (DCM) under light loads via Auto-Skip Eco-mode™. The device includes integrated VREG5 (5.5-V LDO), output discharge MOSFET (50–100 Ω), and dual PGND pins for current-sense accuracy and thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer input rails including 5 V, 12 V, and 15 V systems. |
| Output Current | Up to 5.5 A - sufficient for powering core logic, SoCs, and FPGAs in embedded video applications. |
| Switching Frequency | 650 kHz - enables compact magnetics and balances EMI vs. efficiency trade-offs. |
| High-Side RDS(on) | 63 mΩ - reduces conduction loss during high-duty-cycle operation (e.g., 3.3 V out from 12 V in). |
| Low-Side RDS(on) | 33 mΩ - minimizes synchronous rectification losses and improves light-load efficiency. |
| Feedback Reference | 0.765 V ±0.4% - enables precise output regulation and stable divider design with 1% resistors. |
| Shutdown Current | <10 μA - ensures minimal system standby power draw in always-on consumer electronics. |
Pinout & Package
TPS54526PWPR is housed in a 14-pin HTSSOP (PWP) package with exposed thermal PowerPAD™ (5.00 mm × 4.40 mm), optimized for PCB thermal relief and high-current grounding. Pin functions are validated per TI SLVSB84D Rev D (April 2021).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO (Pin 1) | Output voltage node & discharge path | Connects directly to output capacitor; internal 50–100 Ω discharge FET activates when EN = low. |
| VFB (Pin 2) | Feedback input | Senses output via resistor divider; reference threshold is 0.765 V with ±0.4% accuracy over temperature. |
| VREG5 (Pin 3) | Internal 5.5-V LDO output | Powers internal circuitry and can supply up to 5 mA externally; requires 1-μF bypass to PGND. |
| SS (Pin 4) | Soft-start timing control | 6-μA current source charges external capacitor; enables adjustable ramp time and pre-biased startup. |
| GND (Pin 5) | Signal ground reference | Provides analog reference for feedback and control logic; must be tightly coupled to PGND near IC. |
| PG (Pin 6) | Open-drain power-good indicator | 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 input; internal 220–880 kΩ pull-down; thresholds: VENH = 1.6 V, VENL = 0.6 V. |
| 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 external inductors; serve as inputs to current comparators and VBST bootstrap paths. |
| VBST (Pin 12) | Bootstrap supply for high-side gate driver | Requires ceramic capacitor (typically 0.1 μF) from VBST to SW1/SW2; internal diode connects to VREG5. |
| VIN1, VIN2 (Pins 13,14) | Main input power rails | Dual VIN pins reduce IR drop and improve thermal distribution; both connect to high-side MOSFET drains and VREG5 input. |
| PowerPAD™ (Backside) | Thermal & electrical ground | Mandatory solder connection to large PGND copper area; critical for thermal dissipation (RθJA = 43.7°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ adaptive on-time control | Enables <10-μs transient response without external compensation components or ESR-dependent stability. |
| Eco-mode™ auto-skip operation | Reduces light-load quiescent current to <10 μA while maintaining regulated output down to ~10 mA. |
| Pre-biased soft start | Prevents reverse current flow during startup into pre-charged outputs-critical for hot-swap and multi-rail sequencing. |
| Integrated VREG5 LDO | Delivers stable 5.5 V ±3% at up to 5 mA; powers internal logic and eliminates need for external bias supply. |
| Cycle-by-cycle overcurrent protection | Detects valley current during low-side conduction; non-latching fault response with immediate recovery upon load normalization. |
| Output discharge function | Activates internal 50–100 Ω FET between VO and PGND when disabled-ensures rapid, controlled output voltage decay. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Powering SoC core voltage rail in digital television mainboards with dynamic load steps from video decoding to UI rendering. IC Role / Device Role / Timing Role: Primary buck regulator delivering 1.05 V @ 5.5 A with sub-10-μs transient response to prevent brownout during burst processing. Use Value: D-CAP2™ eliminates loop compensation components, reducing BOM count and layout area while maintaining ±1% output regulation across 0–100% load. | Use Scenario: Generating 3.3 V supply for HDMI interface and audio codec in high-definition Blu-ray Disc™ players. IC Role / Device Role / Timing Role: Secondary buck converter operating at 650 kHz with ceramic output capacitors to meet low-noise EMI requirements. Use Value: Low 33 mΩ low-side RDS(on) and Eco-mode™ sustain >88% efficiency at 100 mA load-extending standby battery life in remote-controlled devices. |
| Application 3 | Application 4 |
Use Scenario: Providing 1.2 V FPGA I/O bank supply in networking home terminal gateways with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with dual PGND and PowerPAD™ thermal path for sustained 4.5-A operation at 85°C ambient. Use Value: 43.7°C/W junction-to-ambient thermal resistance and exposed thermal pad enable operation without heatsink in space-constrained enclosures. | Use Scenario: Regulating 5.0 V USB peripheral bus in digital set-top boxes with hot-plug detection and sequencing constraints. IC Role / Device Role / Timing Role: Main 5-V rail generator with power-good signaling and adjustable soft-start to coordinate with microcontroller boot sequence. Use Value: Open-drain PG output with programmable delay (1.7× tSS) provides deterministic system power sequencing and fault reporting to host MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54528RTQR | Same D-CAP2™ architecture, 5.5-A rating, but in 16-pin QFN (RSA) package with three VIN/SW pins; RθJA = 35.2°C/W. | Better thermal performance and higher current density; requires different PCB footprint and layout. | Preferred for thermally constrained designs needing lower junction temperature rise at full load. |
| MP2359DJ-LF-Z | Monolithic 5-A buck with 4.5–28-V input, fixed 500-kHz frequency, no Eco-mode™; uses voltage-mode control with external compensation. | Lacks pre-biased soft start and power-good output; requires additional components for stability and sequencing. | Selected where cost sensitivity outweighs feature richness and board space is less constrained than thermal budget. |
Compared with TPS54526PWPR, TPS54528RTQR offers superior thermal metrics in QFN packaging but demands layout rework, while MP2359DJ-LF-Z trades advanced control features for lower BOM cost and broader input range-making each suitable for distinct design priorities: thermal headroom, feature integration, or component count.
Availability
TPS54526PWPR is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray Disc™ player subsystems, and networking home terminal designs requiring stable component supply, long-term production continuity, and automotive-grade reliability screening.
Supply support for TPS54526PWPR 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 TPS545xx family was designed specifically for high-current, low-voltage point-of-load regulation in consumer video and broadband equipment-emphasizing fast transient response, light-load efficiency, and minimal external component count.
FAQ
What is the maximum output current supported by the TPS54526PWPR?
The TPS54526PWPR is rated for continuous output current up to 5.5 A under recommended operating conditions (TA ≤ 85°C, proper PCB thermal design). Peak current capability reaches 6.9 A before cycle-by-cycle overcurrent protection triggers. Derating applies above 85°C ambient or with inadequate copper pour on the PowerPAD™.
Does the TPS54526PWPR support pre-biased output startup?
Yes, the TPS54526PWPR includes proprietary pre-biased soft start. When the output voltage is already present at startup, the controller gradually enables synchronous rectification-starting with narrow low-side gate pulses and incrementing duty cycle cycle-by-cycle-to avoid sinking current from the pre-charged rail and ensure monotonic VOUT ramp-up.
What package type is used for the TPS54526PWPR?
The TPS54526PWPR uses a 14-pin HTSSOP (PWP) package with an exposed thermal PowerPAD™ measuring 5.00 mm × 4.40 mm. This package requires soldering the backside thermal pad to a dedicated PGND copper area for optimal thermal performance (RθJA = 43.7°C/W).
How does Eco-mode™ improve light-load efficiency in the TPS54526PWPR?
Eco-mode™ in the TPS54526PWPR enables auto-skip operation below ~200 mA load: the controller discontinues switching cycles until output voltage droop triggers the next pulse. This reduces switching losses and cuts quiescent current to under 10 μA-boosting efficiency from ~65% (PWM-only) to >85% at 10 mA output.
Can the TPS54526PWPR generate its own gate drive bias voltage?
Yes-the TPS54526PWPR integrates a VREG5 LDO that delivers a regulated 5.5 V ±3% output (Pin 3), used internally to power control logic and the high-side gate driver. A 1-μF ceramic capacitor must be placed from VREG5 to PGND. This eliminates the need for an external bias supply while supporting bootstrap capacitor charging via the internal VREG5-to-VBST diode.
TPS54526PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- 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
TPS54526PWPR FAQ
1.How can I place an order for TPS54526PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54526PWPR 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 TPS54526PWPR reliable?
The price and inventory of TPS54526PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54526PWPR is usually 5 days.
3.What payment methods are accepted for TPS54526PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54526PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54526PWPR?
TPS54526PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54526PWPR 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 TPS54526PWPR?
For technical support, including TPS54526PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54526PWPR requirements.
6.How does Aetrix verify that TPS54526PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54526PWPR 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 TPS54526PWPR meets industry standards.
7.What is the process for return or replacement of TPS54526PWPR?
All TPS54526PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54526PWPR, 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 TPS54526PWPR part is unused and in its original packaging.
Return procedure for TPS54526PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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