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Texas Instruments TPS54294PWPR
- Part No.:
- TPS54294PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54294PWPR.pdf
- Description:
- IC REG BUCK ADJ 2A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
TPS54294PWPR from Texas Instruments is a dual-channel synchronous step-down DC/DC converter with integrated 150 mΩ high-side and 100 mΩ low-side N-channel MOSFETs per channel, operating from 4.5 V to 18 V input and delivering up to 2 A per output at 0.76 V–7.0 V. It employs D-CAP2™ adaptive on-time control for fast transient response in digital TV, STB, and gaming console power supplies.
For engineers reviewing the TPS54294PWPR datasheet, TPS54294PWPR pinout, TPS54294PWPR application, or TPS54294PWPR equivalent, key selection criteria include its 700 kHz pseudo-fixed switching frequency, non-sinking pre-biased soft start, loss-less current sensing, and dual independent power-good outputs with ±16% regulation window.
Technical Context
The TPS54294PWPR implements dual independent D-CAP2™ control loops-each combining adaptive on-time PWM with internal compensation to eliminate external loop components while supporting ceramic and low-ESR polymer capacitors. Its valley-current OCP uses thermally compensated rDS(on) sensing across PGNDx–SWx, enabling accurate cycle-by-cycle limiting without sense resistors.
Each channel features fixed 1.0 ms soft start, auto-skip Eco-mode™ for light-load efficiency, and independent enable (EN1/EN2), feedback (VFB1/VFB2), and power-good (PG1/PG2) signals. The VREG5 5.5 V LDO powers internal circuitry and bootstraps VBST1/VBST2 via internal diodes, requiring only 0.1 µF ceramic caps between VBSTx and SWx.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide-input industrial and consumer power rails including 5 V, 12 V, and 15 V nominal supplies. |
| Output Voltage Range | 0.76 V to 7.0 V - programmable via resistor divider on VFB1/VFB2 for core logic, memory, and I/O rail generation. |
| Max Output Current | 2 A per channel - sufficient for FPGA I/O banks, SoC peripherals, and multi-core processor subsystems. |
| Switching Frequency | 700 kHz (pseudo-fixed) - enables compact magnetics and EMI filtering while maintaining high light-load efficiency via Eco-mode™. |
| FET Rds(on) | 150 mΩ HS / 100 mΩ LS - optimized for low duty-cycle operation, minimizing conduction loss at typical 1.2–3.3 V outputs. |
| Soft Start Time | 1.0 ms internal - ensures monotonic voltage ramp without overshoot; supports non-sinking startup into pre-biased outputs. |
| Power-Good Accuracy | ±16% window with 1.5 ms delay - provides reliable system sequencing and fault detection for downstream logic and processors. |
Pinout & Package
TPS54294PWPR is housed in a 16-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad soldered to PCB ground for enhanced thermal dissipation (θJA = 47.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 (Pins 1, 16) | Power Input | Independent input rails for each buck channel; connect to bulk capacitance and decoupling network. |
| VBST1, VBST2 (Pins 2, 15) | Bootstrap Supply | Drive high-side gate; requires 0.1 µF ceramic cap to respective SWx pin for proper bootstrap charging. |
| SW1, SW2 (Pins 3, 14) | Switch Node | Drain-source connection point of internal FETs; routes to external inductor and bootstrap capacitor. |
| PGND1, PGND2 (Pins 4, 13) | Power Ground | Low-side FET source return; must be routed separately from signal ground to minimize noise coupling. |
| EN1, EN2 (Pins 5, 12) | Enable Input | Active-high logic control (2.0 V threshold); allows independent channel sequencing and standby management. |
| PG1, PG2 (Pins 6, 11) | Power-Good Output | Open-drain status flag indicating ±16% regulation; requires external pull-up for system monitoring. |
| VFB1, VFB2 (Pins 7, 10) | Feedback Input | Resistor-divider node for output voltage setting; high-impedance input (±0.35 µA) minimizes divider error. |
| GND (Pin 8) | Signal Ground | Analog reference for VFBx and SSx; tie to single-point ground near VFB pins to reduce noise sensitivity. |
| VREG5 (Pin 9) | Internal LDO Output | 5.5 V regulated supply for internal logic and VBSTx bootstrap; bypass with ≥1.0 µF ceramic to GND. |
| Exposed Pad | Thermal & Electrical Ground | Must be soldered to PCB ground plane with thermal vias; primary path for heat removal and low-impedance return. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Eliminates external compensation components and enables stable operation with ceramic output capacitors as low as 22 µF. |
| Loss-Less Low-Side Sensing | Uses thermally compensated rDS(on) of internal low-side FET for accurate current limit without sense resistor or PCB trace loss. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow during startup into powered outputs by gradually enabling synchronous rectification. |
| Dual Independent Power-Good | Separate open-drain PG1/PG2 outputs with 1.5 ms delay and 2 µs fault response enable precise power sequencing in multi-rail systems. |
| Eco-mode™ Light-Load Operation | Auto-skips switching cycles below ~300 mA load, maintaining >85% efficiency at 10 mA output current. |
Applications
| Digital Television Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers multiple voltage rails (e.g., 3.3 V for tuner, 1.5 V for demodulator, 1.2 V for video processor) from a single 12 V input in compact set-top enclosures. IC Role / Device Role / Timing Role: Dual-channel buck regulator providing isolated, sequenced, and monitored DC outputs for baseband and RF subsystems. Use Value: Reduces BOM count by eliminating discrete regulators and external compensation networks while meeting tight ripple (<20 mV) and transient (<100 ns recovery) requirements. | Use Scenario: Supplies 3.3 V I/O and 1.8 V PHY rails in DSL/cable modems where space and thermal constraints limit heatsink use. IC Role / Device Role / Timing Role: Primary point-of-load converter delivering regulated power to Ethernet PHY, USB controller, and flash memory interfaces. Use Value: Achieves >92% peak efficiency at full load and maintains >80% at 10 mA via Eco-mode™, extending fanless operation time and reducing thermal design margin. |
| Digital Set-Top Box (STB) | Gaming Console Subsystem |
Use Scenario: Generates 1.2 V core, 1.8 V memory, and 3.3 V peripheral rails in STBs with HDMI, Wi-Fi, and audio codecs sharing a common 12 V bus. IC Role / Device Role / Timing Role: Dual-output DC/DC controller managing independent soft-start timing and power-good assertion for safe system boot. Use Value: Enables pre-biased startup into partially powered subsystems and supports dynamic voltage scaling via external EN control without rail collapse. | Use Scenario: Powers GPU voltage islands and audio DSP cores in handheld or portable gaming devices requiring rapid load transients and low quiescent current. IC Role / Device Role / Timing Role: High-speed transient-response buck converter handling 0–2 A load steps within 100 ns while maintaining <±1% regulation. Use Value: Delivers 1.5 V @ 2 A with <15 mV undershoot using D-CAP2™ control and 22 µF ceramic output caps-reducing board area by 40% vs traditional solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54295PWPR | Same pinout and D-CAP2™ architecture but rated for 3 A per channel; higher rDS(on) (120 mΩ HS / 75 mΩ LS) and 1.2 ms soft start. | Better suited for higher-current loads like DDR memory termination or multi-core SoCs requiring >2 A per rail. | Select TPS54295PWPR when output current exceeds 2 A or when tighter output voltage accuracy (±0.5%) is required. |
| MP2494DS-LF-Z | Monolithic dual 2 A buck with constant-on-time control; no integrated VREG5 LDO; requires external bootstrap and feedback components. | Lacks VREG5 and PG outputs; less suitable for systems needing internal bias supply or power sequencing. | Choose MP2494DS-LF-Z only if cost is primary constraint and external component count is acceptable for simplified thermal layout. |
Compared with TPS54294PWPR, TPS54295PWPR offers higher current headroom and improved accuracy but consumes more board space due to larger thermal pad requirements, while MP2494DS-LF-Z reduces solution cost at the expense of missing critical features like integrated LDO, power-good, and pre-biased soft start.
Availability
TPS54294PWPR is available at Aetrix Electronics and suitable for digital TV, networking terminal, and gaming console power supply designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS54294PWPR 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 over 50 years of innovation in high-reliability power conversion.
The TPS54294 product line delivers dual-channel, high-efficiency synchronous buck converters for space-constrained consumer electronics requiring fast transient response, minimal external components, and robust protection features.
FAQ
What is the recommended input capacitor configuration for TPS54294PWPR?
TPS54294PWPR requires a minimum 10 µF ceramic input capacitor placed close to VIN1/VIN2 pins, plus 0.1 µF ceramic capacitors directly from Pins 1 and 16 to PGND to suppress high-frequency SW node ringing. Bulk capacitance (e.g., 47–100 µF tantalum or aluminum polymer) should be added upstream for hold-up time. All capacitors must have voltage ratings exceeding the maximum input voltage (≥20 V).
Does TPS54294PWPR support independent enable and power-good signaling per channel?
Yes, TPS54294PWPR provides fully independent EN1/EN2 inputs and PG1/PG2 open-drain outputs. Each EN pin controls its respective channel's operation, and each PG pin asserts low when its corresponding output deviates beyond ±16% of the target voltage. This enables flexible power sequencing, staggered startup, and fault-isolation in multi-rail systems without external logic.
How does the D-CAP2™ control mode in TPS54294PWPR improve transient response compared to standard voltage-mode control?
TPS54294PWPR's D-CAP2™ control eliminates external compensation by embedding adaptive on-time modulation and internal zero placement. This achieves sub-100 ns load-step recovery with ceramic output capacitors alone-no ESR-dependent ripple needed-while maintaining stability across wide input/output ranges and capacitor ESR variations. Standard voltage-mode controllers require careful external RC network tuning for each specific output cap.
Can TPS54294PWPR operate with pre-biased outputs during startup?
Yes, TPS54294PWPR incorporates non-sinking pre-biased soft start. When the output voltage is already present at startup, the controller gradually enables synchronous rectification by incrementally increasing low-side FET on-time-preventing reverse current flow and ensuring monotonic ramp-up. This avoids damaging downstream circuitry or causing system reset glitches in hot-plug or partial-power scenarios.
What thermal management practices are required for reliable operation of TPS54294PWPR at 2 A per channel?
TPS54294PWPR requires its exposed PowerPAD™ thermal pad to be soldered to a solid copper ground plane with ≥6 thermal vias (0.3 mm diameter) connecting to inner or bottom-layer ground. For continuous 2 A operation at 12 V input and 1.2 V output, ambient temperature must remain ≤65°C. Adding 2–4 cm² of 2 oz copper directly under the pad reduces junction-to-ambient thermal resistance by ~15°C/W versus minimal pad exposure.
TPS54294PWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-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:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 2A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS54294PWPR FAQ
1.How can I place an order for TPS54294PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54294PWPR 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 TPS54294PWPR reliable?
The price and inventory of TPS54294PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54294PWPR is usually 5 days.
3.What payment methods are accepted for TPS54294PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54294PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54294PWPR?
TPS54294PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54294PWPR 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 TPS54294PWPR?
For technical support, including TPS54294PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54294PWPR requirements.
6.How does Aetrix verify that TPS54294PWPR is sourced from the original manufacturer or authorized distributors?
All TPS54294PWPR 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 TPS54294PWPR meets industry standards.
7.What is the process for return or replacement of TPS54294PWPR?
All TPS54294PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54294PWPR, 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 TPS54294PWPR part is unused and in its original packaging.
Return procedure for TPS54294PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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