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Texas Instruments TPS542941PWPR
- Part No.:
- TPS542941PWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS542941PWPR.pdf
- Description:
- IC REG BCK ADJ 2A/3A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,292
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Product details
Overview
TPS542941PWPR 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, supporting 2 A on CH1 and 3 A on CH2. It operates from 4.5 V to 18 V input, delivers adjustable output voltages from 0.76 V to 7 V, and uses D-CAP2™ adaptive on-time control for fast transient response in point-of-load digital TV and STB power supplies.
For engineers reviewing the TPS542941PWPR datasheet, TPS542941PWPR pinout, TPS542941PWPR application, or TPS542941PWPR equivalent, key selection criteria include dual-channel current capability (2A/3A), 700 kHz pseudo-fixed switching frequency, non-sinking pre-biased soft start, loss-less current sensing, and thermal shutdown at 155°C - all critical for compact, high-efficiency multi-rail embedded power designs.
Technical Context
The TPS542941PWPR implements D-CAP2™ control combining adaptive on-time PWM with internal compensation, enabling stable operation with ceramic or low-ESR polymer output capacitors without external loop components. Its valley-current sensing uses thermally compensated rDS(on) of the low-side FET for accurate cycle-by-cycle over-current protection.
Each channel features independent enable (EN1/EN2), power-good (PG1/PG2), and feedback (VFB1/VFB2) pins, with separate VIN1/VIN2, PGND1/PGND2, and VBST1/VBST2 paths - supporting asymmetrical input sourcing and isolated ground return paths for noise-sensitive applications like digital set-top boxes and gaming consoles.
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 | CH1: 2 A continuous; CH2: 3 A continuous - enables independent powering of core logic (e.g., 1.5 V) and I/O (e.g., 3.3 V) rails. |
| Switching Frequency | ~700 kHz (adaptive on-time) - balances efficiency, EMI, and inductor size; frequency varies <±5% with input/output voltage changes. |
| Feedback Reference | 765 mV ±7 mV (25°C) - sets output voltage via resistor divider; temperature coefficient ±115 ppm/°C ensures stability across –40°C to 85°C. |
| Soft Start Time | 1.0 ms fixed internal ramp - prevents inrush current and ensures monotonic startup even with pre-biased outputs. |
| Thermal Shutdown | 155°C threshold with 25°C hysteresis - protects against sustained overload while allowing recovery without external reset. |
| Power-Good Accuracy | ±16% window around target VOx - provides reliable rail monitoring with 1.5 ms delay on assertion and 2 µs on deassertion. |
Pinout & Package
TPS542941PWPR is housed in a 16-pin HTSSOP (PWP) package with exposed PowerPAD™ thermal pad requiring solder connection to PCB ground plane for thermal performance (θJA = 47.5°C/W). Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 / VIN2 | Power Inputs | Independent input supply connections for each channel; must be decoupled with ≥10 µF ceramic + 0.1 µF local caps. |
| VBST1 / VBST2 | Bootstrap Supplies | Drive high-side gate; require 0.1 µF X5R/X7R ceramic cap between VBSTx and SWx for proper bootstrapping. |
| SW1 / SW2 | Switch Nodes | Drain-source connections of internal half-bridges; route with minimal loop area to reduce EMI and ringing. |
| PGND1 / PGND2 | Power Ground Returns | Low-side FET source returns; connect separately to PowerPAD™ and keep away from signal ground traces. |
| EN1 / EN2 | Enable Inputs | CMOS-compatible logic enables; 2.0 V high-threshold and 0.4 V low-threshold allow direct MCU GPIO control. |
| PG1 / PG2 | Open-Drain Power-Good | Indicate regulation status; require external pull-up (e.g., 10 kΩ to 3.3 V) and support sequencing in multi-rail systems. |
| VFB1 / VFB2 | Feedback Inputs | Connect to resistor dividers setting VOx; input bias current ±0.4 µA allows use of high-value resistors to minimize quiescent loss. |
| VREG5 | 5.5 V Linear Regulator Output | Supplies internal circuitry; bypass with ≥1.0 µF ceramic cap to GND; active only when VIN1 > 3.83 V. |
| GND | Signal Ground | Reference for VFBx, ENx, PGx; tie to PowerPAD™ at single point near IC to avoid ground bounce. |
| PowerPAD™ | Thermal & Electrical Ground | Exposed copper pad under package; must be soldered to large PCB copper pour connected to system ground for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Eliminates need for external compensation components while maintaining stability with ceramic or POSCAP output capacitors - reduces BOM count and layout complexity. |
| Loss-Less Low-Side Current Sensing | Uses thermally compensated rDS(on) of internal low-side FET for accurate OCP without sense resistors - preserves efficiency and avoids additional power loss. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow during startup into pre-charged outputs by gradually enabling synchronous rectification - essential for hot-swap and multi-rail sequencing. |
| Auto-Skip Eco-mode™ | Transitions to discontinuous conduction mode below ~200 mA load per channel, improving light-load efficiency up to 15% vs forced-PWM operation. |
| Hiccup-Mode Overload Protection | Shuts down for 7×UVP enable delay (10.5 ms) after undervoltage detection, then retries - limits junction temperature rise during sustained short-circuit faults. |
Applications
| Digital Set-Top Box (STB) | Gaming Console Core Power |
|---|---|
Use Scenario: Dual-rail power delivery for SoC core (1.2 V @ 2 A) and memory interface (3.3 V @ 3 A) in compact STB enclosures with strict thermal constraints. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, sequenced, and monitored DC rails with fast transient response to dynamic CPU load changes. Use Value: D-CAP2™ control maintains <±1% output deviation during 0–2 A load steps; PG1/PG2 signals coordinate FPGA configuration timing and system reset sequencing. | Use Scenario: Point-of-load conversion for GPU voltage domain (1.05 V @ 2.5 A) and I/O subsystem (1.8 V @ 3 A) in handheld gaming devices with limited board space. IC Role / Device Role / Timing Role: Dual-channel DC/DC controller delivering independent, low-noise power rails with thermal-aware hiccup protection during burst-mode gameplay. Use Value: 700 kHz switching enables small 2.2 µH inductors; PowerPAD™ thermal pad sustains 85°C ambient without derating; Eco-mode™ extends battery runtime at idle. |
| DVD Player/Recorder | Networking Home Terminal |
Use Scenario: Powering servo motor driver (5 V @ 1.5 A) and digital audio processor (1.5 V @ 2 A) from shared 12 V wall adapter in cost-sensitive consumer AV equipment. IC Role / Device Role / Timing Role: Cost-optimized dual buck converter replacing discrete solutions, integrating FETs, drivers, and protection logic in one package. Use Value: Integrated 150/100 mΩ FETs achieve >92% peak efficiency at 12 V→5 V; fixed soft-start eliminates need for external timing components. | Use Scenario: Generating 3.3 V for Ethernet PHY and 1.2 V for ARM-based network processor in DSL/cable modems operating continuously in residential environments. IC Role / Device Role / Timing Role: High-reliability dual buck regulator with UVLO, OVP, UVP, and thermal shutdown - meeting long-life field requirements. Use Value: ±16% PG accuracy ensures clean power-good assertion before firmware initialization; 155°C thermal shutdown prevents catastrophic failure during fan failure events. |
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 |
|---|---|---|---|
| TPS542951PWPR | Same pinout, identical D-CAP2™ architecture, but rated for 3 A/4 A (CH1/CH2); higher Rds(on) tolerance and improved thermal performance. | Supports higher current loads without redesign; requires verification of inductor saturation current and output capacitor RMS rating. | Select when CH1 load exceeds 2 A or ambient temperature exceeds 70°C; no PCB change needed. |
| MP2451DT-LF-Z | Single-channel 2 A buck; no dual-output capability, no PG outputs, no pre-biased soft start; uses current-mode control instead of D-CAP2™. | Requires two separate ICs and additional sequencing logic to replicate dual-rail functionality; less suitable for tight transient response requirements. | Consider only for cost-driven, low-complexity single-rail designs where dual-channel integration is not required. |
Compared with TPS542951PWPR, the TPS542941PWPR offers lower cost and sufficient current headroom for typical STB and DVD applications; versus MP2451DT-LF-Z, it delivers true dual-rail integration, built-in sequencing, and superior transient performance - reducing total solution size by >35%.
Availability
TPS542941PWPR is available at Aetrix Electronics and suitable for digital TV power supply, networking home terminal, and digital set-top box (STB) applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS542941PWPR 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The TPS542941 belongs to TI's D-CAP2™ synchronous buck converter product line, engineered for high-efficiency, low-component-count point-of-load regulation in space-constrained consumer and industrial electronics.
FAQ
What is the maximum recommended input voltage for the TPS542941PWPR?
The absolute maximum input voltage for TPS542941PWPR is 20 V, but the recommended operating range is 4.5 V to 18 V. Exceeding 18 V risks violating the 20 V absolute limit during transients and may trigger UVLO or damage internal structures. For reliable long-term operation, maintain VIN1 and VIN2 within 4.5–18 V under all conditions, including ripple and overshoot.
Does the TPS542941PWPR support independent enable and power-good signaling per channel?
Yes, the TPS542941PWPR provides fully independent EN1/EN2 enable inputs and PG1/PG2 open-drain power-good outputs. Each pair operates autonomously: EN1 controls CH1 only, EN2 controls CH2 only, and PG1 asserts only when VO1 is within ±16% of its target, while PG2 does the same for VO2 - enabling precise rail sequencing in multi-voltage systems.
How does the TPS542941PWPR achieve stable operation without external compensation components?
The TPS542941PWPR uses D-CAP2™ adaptive on-time control, which embeds internal compensation circuitry that automatically adapts to output capacitor ESR and ESL. This eliminates the need for external RC networks while maintaining stability with ceramic, POSCAP, or SP-CAP capacitors - verified across 20 µF to 68 µF ranges and ESR values as low as 2 mΩ.
Can the TPS542941PWPR safely start up into a pre-biased output voltage?
Yes, the TPS542941PWPR implements non-sinking pre-biased soft start. When VOx is already charged, the controller delays full synchronous rectification and incrementally increases low-side FET on-time cycle-by-cycle until reaching steady-state duty - preventing reverse current flow and ensuring monotonic, glitch-free startup without external diodes or circuits.
What thermal management considerations apply to the TPS542941PWPR in HTSSOP package?
The TPS542941PWPR in HTSSOP (PWP) package requires soldering the PowerPAD™ thermal pad to a minimum 200 mm² copper pour tied to system ground. With θJA = 47.5°C/W, maintaining TJ ≤ 125°C at 85°C ambient demands ≥2 oz copper and at least four thermal vias under the pad. Thermal shutdown triggers at 155°C, but design margin should keep peak junction temperature below 125°C under worst-case load.
TPS542941PWPR 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, 3A
- Frequency - Switching:
- 700kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
TPS542941PWPR FAQ
1.How can I place an order for TPS542941PWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS542941PWPR 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 TPS542941PWPR reliable?
The price and inventory of TPS542941PWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS542941PWPR is usually 5 days.
3.What payment methods are accepted for TPS542941PWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS542941PWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS542941PWPR?
TPS542941PWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS542941PWPR 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 TPS542941PWPR?
For technical support, including TPS542941PWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS542941PWPR requirements.
6.How does Aetrix verify that TPS542941PWPR is sourced from the original manufacturer or authorized distributors?
All TPS542941PWPR 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 TPS542941PWPR meets industry standards.
7.What is the process for return or replacement of TPS542941PWPR?
All TPS542941PWPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS542941PWPR, 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 TPS542941PWPR part is unused and in its original packaging.
Return procedure for TPS542941PWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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