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Texas Instruments TPS54526RSAT
- Part No.:
- TPS54526RSAT
- Manufacturer:
- Texas Instruments
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TPS54526RSAT.pdf
- Description:
- IC REG BUCK ADJ 5.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:663
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Product details
Overview
TPS54526RSAT from Texas Instruments is a 5.5-A synchronous step-down DC/DC converter with D-CAP2™ control, Eco-mode™ for light-load efficiency, and integrated 63-mΩ high-side / 33-mΩ low-side MOSFETs. It operates from 4.5 V to 18 V input, delivers adjustable 0.76 V to 5.5 V output, and targets digital TV power supplies requiring fast transient response and ceramic-capacitor compatibility.
For engineers reviewing the TPS54526RSAT datasheet, TPS54526RSAT pinout, TPS54526RSAT application, or TPS54526RSAT equivalent, key selection considerations include adaptive on-time control architecture, 650-kHz pseudo-fixed switching frequency, cycle-by-cycle overcurrent protection, power-good signaling, and thermal shutdown at 165°C.
Technical Context
The TPS54526RSAT implements adaptive on-time D-CAP2™ mode control-eliminating external compensation while enabling sub-100-ns transient response. Its internal one-shot timer sets on-time based on VIN and VOUT, maintaining ~650 kHz operation across input and load variations.
It integrates dual N-channel MOSFETs (63 mΩ HS / 33 mΩ LS), supports pre-biased soft-start, and uses valley-current sensing for cycle-by-cycle OCP. Output discharge is handled by a dedicated 50-Ω internal MOSFET tied to VO–PGND, independent of synchronous rectification.
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 | 5.5 A continuous - sufficient for powering SoCs, FPGAs, and DDR memory in digital entertainment systems. |
| Switching Frequency | 650 kHz (typical) - enables compact magnetics and balances EMI vs. efficiency trade-offs. |
| High-Side RDS(on) | 63 mΩ - reduces conduction loss at high duty cycles, improving efficiency above 3.3 V output. |
| Low-Side RDS(on) | 33 mΩ - minimizes losses during freewheeling, critical for high-current, low-VOUT applications. |
| Feedback Reference | 0.765 V (±0.5% over temp) - enables precise regulation down to 0.76 V with minimal resistor divider error. |
| Shutdown Current | <10 μA - ensures ultra-low system standby power in always-on consumer devices. |
Pinout & Package
TPS54526RSAT is housed in a 16-pin QFN package (4.00 mm × 4.00 mm, 0.5-mm pitch) with exposed thermal pad (PowerPAD™) soldered to PGND for optimal thermal performance (RθJB = 12.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VO | Output voltage node | Connects directly to output capacitor; provides internal discharge path via 50-Ω MOSFET when disabled. |
| VFB | Feedback input | Monitors regulated output via resistor divider; threshold is 0.765 V with ±0.5% accuracy over temperature. |
| VREG5 | Internal 5.5-V LDO output | Powers internal circuitry and can supply up to 5 mA externally; requires 1-μF bypass to PGND. |
| SS | Soft-start control | 6-μA current source charges external capacitor; enables adjustable ramp time and pre-biased startup. |
| PG | Open-drain power-good | Asserts high after 1.7× soft-start time when VOUT is within ±10%; requires 25–150-kΩ pull-up to VREG5. |
| EN | Enable input | Active-high logic input (VENH = 1.6 V min); internal 440-kΩ pull-down ensures default disable. |
| VIN1–VIN3 | Input power pins | Three parallel VIN connections reduce IR drop and improve current sharing into high-side FET drains. |
| SW1–SW3 | Switch nodes | Three switch terminals connect high-side/low-side FET junctions; SW3 is unique to RSA package for multi-phase support. |
| PGND1/PGND2 | Power ground returns | Separate low-side FET source returns; must be tightly coupled to PowerPAD™ for accurate current sensing. |
| VBST | Bootstrap supply | Charged via internal diode from VREG5; requires 0.1-μF capacitor to each SW pin for high-side gate drive. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control mode | Enables zero-external-compensation design with <100-ns load-step response and stable operation with ceramic output capacitors. |
| Eco-mode™ auto-skip | Transitions seamlessly from PWM to discontinuous conduction at light loads, sustaining >85% efficiency at 10-mA output. |
| Integrated dual MOSFETs | 63-mΩ/33-mΩ RDS(on) pair optimized for 0.76–5.5 V outputs, eliminating external power stage components. |
| Pre-biased soft-start | Prevents reverse current flow during startup into pre-charged rails-critical for hot-plug and multi-rail sequencing. |
| Comprehensive protection suite | Includes cycle-by-cycle OCP, output OVP/UVP (125%/65%), UVLO (3.61 V wake-up), and thermal shutdown (165°C). |
Applications
| Digital TV Power Supply | Blu-ray Disc™ Player |
|---|---|
Use Scenario: Powers main SoC, video decoder, and HDMI interface in 4K UHD television platforms with tight ripple and transient requirements. IC Role / Device Role / Timing Role: Primary 1.05-V/5.5-A buck regulator delivering clean, low-noise core voltage with <7-mVPP ripple at full load. Use Value: D-CAP2™ control maintains regulation during rapid channel-switch transients without external loop compensation. | Use Scenario: Supplies 1.2-V core and 3.3-V I/O rails in high-definition optical disc players with variable disc-spin and laser-drive loads. IC Role / Device Role / Timing Role: Dual-output implementation (using two TPS54526RSATs) delivers independent, sequenced voltages with coordinated power-good signaling. Use Value: Pre-biased soft-start prevents output voltage collapse when auxiliary 3.3-V rail powers up before 1.2-V core rail. |
| Networking Home Terminal | Digital Set Top Box (STB) |
Use Scenario: Provides 1.8-V and 2.5-V rails for Ethernet PHY, Wi-Fi SoC, and memory in residential gateways and mesh routers. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in Eco-mode™ during idle periods to meet Energy Star standby power limits (<0.5 W). Use Value: Sub-10-μA shutdown current and 650-kHz switching enable small filter size while meeting Class B conducted EMI standards. | Use Scenario: Delivers 1.05-V CPU core and 1.8-V GPU rails in cable/satellite STBs with bursty video decoding workloads. IC Role / Device Role / Timing Role: Synchronous buck regulator with fast transient recovery to prevent frame drops during scene-change decode bursts. Use Value: 63-mΩ/33-mΩ MOSFET pair achieves >92% peak efficiency at 5-A load, reducing thermal load on compact metal-shielded enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54528RSAT | Same pinout and footprint; adds spread-spectrum clocking and improved light-load efficiency (Eco-mode™+). | Better EMI compliance in noise-sensitive RF co-location environments (e.g., STB with integrated tuner). | Select TPS54528RSAT if EMI reduction is prioritized over cost; otherwise TPS54526RSAT remains optimal for cost-sensitive volume designs. |
| MP2359DJ-LF-P | 4.5–28-V input, 5-A output; fixed 500-kHz frequency; no VREG5 output or pre-biased soft-start. | Suitable for simpler 5-V rail generation where auxiliary biasing and sequencing are not required. | Choose MP2359DJ-LF-P only for non-sequenced, single-rail applications lacking pre-bias or power-good requirements. |
Compared with TPS54526RSAT, TPS54528RSAT offers enhanced EMI performance at identical layout and cost premium, while MP2359DJ-LF-P trades advanced features for broader input range and lower BOM count in basic applications.
Availability
TPS54526RSAT is available at Aetrix Electronics and suitable for digital TV power supplies, Blu-ray Disc™ players, and networking home terminals requiring stable component supply, long-term production continuity, and automotive-grade reliability screening.
Supply support for TPS54526RSAT 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 TPS54526RSAT belongs to TI's D-CAP2™ synchronous buck converter family, designed specifically for consumer electronics requiring fast transient response, ultra-low standby power, and seamless integration with ceramic output capacitors.
FAQ
What is the maximum output current capability of the TPS54526RSAT?
The TPS54526RSAT is rated for 5.5 A continuous output current under recommended operating conditions (TA ≤ 85°C, proper PCB layout, and adequate thermal management). Peak current limit is 6.9 A typical, with thermal shutdown activating at junction temperatures exceeding 165°C to protect the device.
Does the TPS54526RSAT support pre-biased output startup?
Yes, the TPS54526RSAT includes proprietary pre-biased soft-start circuitry. When the output voltage is already present at startup, the controller incrementally activates the low-side FET with narrow on-times to avoid sinking current from the pre-charged rail-ensuring smooth, monotonic ramp-up of VO without voltage reversal or overshoot.
What package type and thermal characteristics apply to the TPS54526RSAT?
The TPS54526RSAT uses a 16-pin QFN package (RSA) measuring 4.00 mm × 4.00 mm with an exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 12.3°C/W, and it requires soldering the PowerPAD™ to a PGND copper plane for effective heat dissipation in high-current applications.
How does the TPS54526RSAT implement overcurrent protection?
The TPS54526RSAT uses cycle-by-cycle valley-current limiting. It monitors the voltage across the low-side MOSFET (SW-to-PGND) during its on-time; when this voltage exceeds the threshold corresponding to ~6.9 A, the switching cycle terminates immediately. This non-latching protection resets each cycle and avoids false triggering from inductor ripple.
Can the TPS54526RSAT operate with ceramic output capacitors?
Yes-the TPS54526RSAT's D-CAP2™ control architecture and internal compensation are explicitly designed for stability with ultra-low-ESR ceramic capacitors. No additional ESR or external compensation components are needed, enabling smaller, more reliable output filters compared to traditional voltage-mode controllers.
TPS54526RSAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-VQFN Exposed Pad
- 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:
- 16-QFN (4x4)
TPS54526RSAT FAQ
1.How can I place an order for TPS54526RSAT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54526RSAT 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 TPS54526RSAT reliable?
The price and inventory of TPS54526RSAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54526RSAT is usually 5 days.
3.What payment methods are accepted for TPS54526RSAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54526RSAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54526RSAT?
TPS54526RSAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54526RSAT 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 TPS54526RSAT?
For technical support, including TPS54526RSAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54526RSAT requirements.
6.How does Aetrix verify that TPS54526RSAT is sourced from the original manufacturer or authorized distributors?
All TPS54526RSAT 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 TPS54526RSAT meets industry standards.
7.What is the process for return or replacement of TPS54526RSAT?
All TPS54526RSAT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54526RSAT, 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 TPS54526RSAT part is unused and in its original packaging.
Return procedure for TPS54526RSAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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