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Texas Instruments TPS54294PWP
- Part No.:
- TPS54294PWP
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS54294PWP.pdf
- Description:
- IC REG BUCK ADJ 2A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:236
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Product details
Overview
TPS54294PWP from Texas Instruments is a dual-channel, 2A/2A synchronous step-down DC-DC converter with integrated high-side (150 mΩ) and low-side (100 mΩ) N-channel MOSFETs, D-CAP2™ adaptive on-time control, 700 kHz pseudo-fixed switching frequency, and 0.76 V to 7.0 V output voltage range per channel - used in digital TV, STB, and gaming console point-of-load regulation.
For engineers reviewing the TPS54294PWP datasheet, TPS54294PWP pinout, TPS54294PWP application, or TPS54294PWP equivalent, key selection considerations include dual-channel independent enable (EN1/EN2), non-sinking pre-biased soft start, lossless low-side current sensing, and thermal shutdown at 155°C with 25°C hysteresis - all in a thermally enhanced HTSSOP-16 PowerPAD package.
Technical Context
The TPS54294PWP implements D-CAP2™ control combining adaptive on-time PWM with internal compensation, enabling stable operation with ceramic or ultra-low-ESR polymer capacitors without external loop components. Its fast transient response stems from direct output-voltage ripple sensing and an internal ramp that simulates ripple for zero-crossing detection.
Each channel operates independently with fixed 1.0 ms soft-start, power-good monitoring (±16% VO tolerance, 1.5 ms high-delay, 2 µs low-delay), and cycle-by-cycle over-current protection using thermally compensated rDS(on) sensing. Eco-mode™ enables auto-skip at light loads while maintaining 700 kHz nominal frequency under full load via VIN–VO-dependent on-time calculation.
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 without external regulators. |
| Output Voltage Range | 0.76 V to 7.0 V per channel - programmable via resistor divider; enables core logic (1.2 V), I/O (1.8 V/3.3 V), and analog (5 V) rail generation. |
| Max Output Current | 2 A per channel - sufficient for FPGA I/O banks, SoC peripherals, and multi-core microcontrollers in compact designs. |
| Switching Frequency | 700 kHz (pseudo-fixed) - balances EMI, inductor size, and efficiency; frequency varies <±5% across VIN and IOUT due to adaptive on-time architecture. |
| Feedback Accuracy | ±0.9% (758–773 mV at 25°C) - ensures tight output regulation critical for noise-sensitive analog subsystems and memory interfaces. |
| Thermal Shutdown | 155°C threshold with 25°C hysteresis - protects against sustained overload or poor PCB thermal design; junction temperature must stay ≤110°C during VIN1 startup. |
| Soft Start Time | 1.0 ms internal - prevents inrush current and output overshoot; supports pre-biased startup without sinking current from existing rail. |
Pinout & Package
TPS54294PWP is housed in a 16-pin HTSSOP (PWP) package with exposed PowerPAD thermal pad soldered to PCB ground for optimal heat dissipation (θJA = 47.5°C/W, θJB = 20.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 (Pins 1, 16) | Power input supply | Independent inputs for each buck channel; connect to system 4.5–18 V rail; require local 10 µF + 0.1 µF decoupling. |
| VBST1, VBST2 (Pins 2, 15) | Bootstrap supply | Drive high-side gate; connect 0.1 µF ceramic capacitor to corresponding SWx pin; internally diode-clamped to VREG5. |
| SW1, SW2 (Pins 3, 14) | Switch node | Drain-source connection of internal FET pair; route with minimal loop area; connects to external inductor and bootstrap cap. |
| PGND1, PGND2 (Pins 4, 13) | Power ground return | Low-side FET source return; separate paths required per channel to avoid current-sense coupling errors. |
| EN1, EN2 (Pins 5, 12) | Enable control | Active-high logic; 2.0 V min high threshold, 0.4 V max low threshold; internal 225–900 kΩ pull-down enables default disable. |
| PG1, PG2 (Pins 6, 11) | Power-good open-drain | Indicates ±16% VO regulation; requires external pull-up; asserts low within 2 µs on fault; delays 1.5 ms after soft-start completion. |
| VFB1, VFB2 (Pins 7, 10) | Feedback input | Connects to resistor divider from VOx; 0.765 V reference; ±0.35 µA input bias enables high-value dividers for low quiescent current. |
| GND (Pin 8) | Signal ground | Analog reference for VFBx, SSx, and internal comparators; tie to PGND at single-point star ground near IC. |
| VREG5 (Pin 9) | 5.5 V linear regulator | Supplies internal circuitry and VBSTx; active when VIN1 > UVLO; bypass with ≥1.0 µF ceramic to GND. |
| PowerPAD (Bottom) | Thermal & electrical ground | Must be soldered to solid GND plane with ≥6 thermal vias; primary path for heat removal and low-impedance return. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Enables zero-external-compensation design with ceramic capacitors; achieves <10 µs load-step response without tuning. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow during startup into existing rail; eliminates need for external blocking diodes or sequencing controllers. |
| Loss-Less Low-Side Current Sensing | Uses rDS(on) of internal low-side FET; avoids sense-resistor power loss and board space; accuracy maintained via 4000 ppm/°C thermal compensation. |
| Auto-Skip Eco-mode™ | Reduces light-load quiescent current to 80–200 µA; extends battery life in standby mode without compromising heavy-load efficiency (>90% at 1 A). |
| Comprehensive Protection Suite | Includes cycle-by-cycle OCP, ±16% OVP/UVP (with 1.5 ms delay), UVLO on VREG5, and thermal shutdown with hysteresis - all latched only on EN toggle. |
Applications
| Digital Television Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers SoC core (1.2 V), DDR interface (1.5 V), and HDMI PHY (3.3 V) from single 12 V input in slim-profile TV chassis. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering independent, tightly regulated rails with fast transient response to handle video frame bursts and audio processing spikes. Use Value: Eliminates need for three discrete converters; reduces BOM count by 40% and PCB area by 35% versus single-channel solutions. | Use Scenario: Supplies CPU (1.1 V), USB controller (3.3 V), and Ethernet PHY (2.5 V) in cable modem/router with strict thermal limits and EMI requirements. IC Role / Device Role / Timing Role: Synchronous buck converter with Eco-mode™ enabling <100 µA no-load current and 700 kHz switching for predictable EMI filtering. Use Value: Achieves >88% efficiency at 10 mA load and meets FCC Class B conducted emissions without added shielding. |
| Digital Set Top Box (STB) | Gaming Console Peripheral |
Use Scenario: Generates 1.05 V core, 1.8 V memory, and 3.3 V I/O rails for ARM-based media processor in fanless STB enclosure. IC Role / Device Role / Timing Role: Dual-output DC-DC with independent EN pins enabling staggered power-up and dynamic rail scaling during video decode. Use Value: Supports pre-biased startup for hot-plug HDMI sources; maintains <±1% output regulation across –40°C to 85°C ambient. | Use Scenario: Powers RGB LED backlight driver (5 V) and touch controller (1.8 V) in portable gaming accessory with Li-ion battery input (3.0–4.2 V). IC Role / Device Role / Timing Role: Dual buck converter operating down to 4.5 V VIN; uses VREG5 to self-power gate drivers and internal logic without auxiliary supply. Use Value: Enables single-stage conversion from battery to multiple rails; improves system efficiency by 12% versus LDO-based approach. |
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 |
|---|---|---|---|
| TPS54295PWP | Same pinout and D-CAP2™ architecture but rated for 3 A per channel; higher rDS(on) (120 mΩ HS / 70 mΩ LS) and 1.2 ms soft-start. | Preferred for higher-current loads (e.g., GPU cores); requires larger inductors and output caps due to increased peak current. | Select when >2 A/channel is needed; verify thermal margin with θJA = 47.5°C/W and higher conduction losses. |
| MP2494DS-LF-Z | Monolithic dual 2 A buck with constant-on-time control; no integrated VREG5; 500 kHz fixed frequency; smaller QFN-16 package (3 mm × 4 mm). | Better suited for space-constrained designs; lacks pre-biased soft start and VREG5-powered bootstrap, requiring external LDO. | Choose for compact footprint and lower cost where VREG5 integration and pre-bias support are not required. |
Compared with TPS54294PWP, TPS54295PWP delivers higher current headroom at the expense of slightly reduced light-load efficiency, while MP2494DS-LF-Z trades integrated bias regulation and advanced startup features for smaller size and simpler bill-of-materials.
Availability
TPS54294PWP is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and gaming console peripherals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54294PWP 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 and automotive-grade reliability.
The TPS54294 product line delivers dual-channel, adaptive on-time synchronous buck converters optimized for cost-sensitive, space-constrained consumer electronics requiring fast transient response and seamless light-to-heavy load efficiency.
FAQ
What is the maximum recommended output current per channel for TPS54294PWP?
The TPS54294PWP is rated for continuous 2 A per channel under typical thermal conditions (TA = 85°C, 2-layer PCB, 2 oz copper). Derating is required above 85°C ambient or with limited airflow; thermal performance depends heavily on PowerPAD soldering quality and thermal via count. The device enters thermal shutdown at 155°C junction temperature, with 25°C hysteresis.
Does TPS54294PWP support pre-biased output startup, and how does it work?
Yes, TPS54294PWP implements non-sinking pre-biased soft start. When the output voltage exceeds the internal soft-start DAC voltage at power-up, the controller gradually increases low-side FET on-time cycle-by-cycle instead of forcing immediate conduction. This prevents reverse current flow from the pre-charged rail, eliminating the need for external isolation diodes in hot-swap or multi-rail systems using TPS54294PWP.
What is the purpose of the VREG5 pin on TPS54294PWP, and how should it be decoupled?
VREG5 is a 5.5 V linear regulator output that powers internal gate drivers and control circuitry. It activates when VIN1 rises above UVLO (3.83 V) and must be bypassed with ≥1.0 µF high-quality ceramic capacitor (X5R/X7R) directly to GND. Failure to properly decouple VREG5 causes erratic switching, bootstrap charging failure, and potential latch-up - a critical design requirement for reliable TPS54294PWP operation.
How does the D-CAP2™ control mode in TPS54294PWP differ from standard constant-on-time architectures?
TPS54294PWP's D-CAP2™ control adds an internal ramp to the feedback signal to simulate output ripple, enabling stable operation with zero-ESR ceramic capacitors - unlike basic constant-on-time controllers that require minimum ESR for stability. It also integrates adaptive on-time calculation (based on VIN and VO) to maintain ~700 kHz frequency across input/output ranges, whereas standard COT schemes exhibit wider frequency variation.
Can TPS54294PWP operate with only one channel enabled while the other remains disabled?
Yes, TPS54294PWP supports independent channel control via EN1 and EN2 pins. Either channel can be disabled (ENx = 0 V) while the other operates normally, with no cross-talk or efficiency penalty. Disabled channels draw only 80–200 µA shutdown current, and their PGx output remains low. This enables flexible power sequencing and dynamic rail management in systems using TPS54294PWP.
TPS54294PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- D-CAP2™, Eco-Mode™
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
TPS54294PWP FAQ
1.How can I place an order for TPS54294PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54294PWP 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 TPS54294PWP reliable?
The price and inventory of TPS54294PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54294PWP is usually 5 days.
3.What payment methods are accepted for TPS54294PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54294PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54294PWP?
TPS54294PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54294PWP 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 TPS54294PWP?
For technical support, including TPS54294PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54294PWP requirements.
6.How does Aetrix verify that TPS54294PWP is sourced from the original manufacturer or authorized distributors?
All TPS54294PWP 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 TPS54294PWP meets industry standards.
7.What is the process for return or replacement of TPS54294PWP?
All TPS54294PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS54294PWP, 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 TPS54294PWP part is unused and in its original packaging.
Return procedure for TPS54294PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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