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Texas Instruments TPS542941PWP
- Part No.:
- TPS542941PWP
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS542941PWP.pdf
- Description:
- IC REG BCK ADJ 2A/3A DL 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
TPS542941PWP 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 Channel 1 and 3 A on Channel 2. 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 TPS542941PWP datasheet, TPS542941PWP pinout, TPS542941PWP application, or TPS542941PWP equivalent, key selection criteria include dual-channel current capability (2A/3A), HTSSOP-16 PowerPAD™ thermal package, fixed 700 kHz pseudo-switching frequency, non-sinking pre-biased soft start, and loss-less low-side current sensing for accurate over-current protection.
Technical Context
The TPS542941PWP implements D-CAP2™ control - an adaptive on-time architecture that eliminates external compensation while maintaining stability with ceramic or low-ESR polymer output capacitors. Its internal ramp-based reference simulation enables robust regulation even at near-zero output ripple.
Each channel features independent enable (EN1/EN2), power-good (PG1/PG2), and feedback (VFB1/VFB2) pins, with separate VIN1/VIN2 inputs and PGND1/PGND2 return paths. The device integrates a 5.5 V linear regulator (VREG5) and uses thermally compensated rDS(on)-based cycle-by-cycle OCP with hiccup-mode overload recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 18 V - supports wide industrial and consumer DC bus rails including 5 V, 12 V, and 15 V systems. |
| Output Current | 2 A (CH1) / 3 A (CH2) continuous - enables independent regulation of core and I/O rails in compact embedded systems. |
| Switching Frequency | ~700 kHz (adaptive on-time) - provides consistent EMI profile and allows use of small, standard-value inductors (e.g., 1.5–2.2 µH). |
| Feedback Accuracy | ±0.9% initial VFB threshold (765 mV typ) - ensures tight output voltage regulation across temperature and line variations. |
| Soft Start Time | 1.0 ms internal - prevents inrush current and enables controlled, monotonic startup without external components. |
| Thermal Protection | 155°C shutdown with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Package | HTSSOP-16 with PowerPAD™ - exposes die attach pad to PCB ground plane for low θJA (47.5°C/W) and reliable 2–3 W power dissipation. |
Pinout & Package
TPS542941PWP is housed in a 4.4 mm × 5.0 mm 16-pin HTSSOP package with exposed PowerPAD™ thermal pad (pin 16, backside). The PowerPAD™ must be soldered to a dedicated GND copper area for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 (Pin 1) | Power input for CH1 | Supplies high-side FET drain and VREG5 LDO input; requires local 10 µF + 0.1 µF decoupling. |
| VBST1 (Pin 2) | Bootstrap supply for CH1 high-side gate | Connects via 0.1 µF ceramic capacitor to SW1; enables NMOS high-side drive without external charge pump. |
| SW1 (Pin 3) | Switch node for CH1 | Drain-source connection point of both CH1 FETs; routes to output inductor; critical for EMI and layout. |
| PGND1 (Pin 4) | Power ground for CH1 low-side FET | Return path for CH1 switch current; must connect directly to PowerPAD™ and output capacitor ground. |
| EN1 (Pin 5) | Enable control for CH1 | Active-high logic input (2.0 V threshold); supports sequencing and standby mode control. |
| PG1 (Pin 6) | Open-drain power-good for CH1 | Asserts high after 1.5 ms when VO1 is within ±16% of target; requires external pull-up resistor. |
| VFB1 (Pin 7) | Feedback input for CH1 | Connects to resistor divider from VO1; sets output voltage via 0.765 V internal reference. |
| GND (Pin 8) | Signal ground reference | Low-noise analog return; tie VFBx and sensitive analog traces here before connecting to PowerPAD™. |
| VREG5 (Pin 9) | 5.5 V linear regulator output | Powers internal circuitry; bypass with ≥1 µF ceramic capacitor; active only when VIN1 > UVLO threshold. |
| VFB2 (Pin 10) | Feedback input for CH2 | Identical function to VFB1; enables independent VO2 regulation with separate resistor divider. |
| PG2 (Pin 11) | Open-drain power-good for CH2 | Independent status signal for VO2; same timing and tolerance as PG1. |
| EN2 (Pin 12) | Enable control for CH2 | Independent enable logic for CH2; allows staggered or asymmetric power sequencing. |
| PGND2 (Pin 13) | Power ground for CH2 low-side FET | Dedicated return for CH2 current; isolate from PGND1 if cross-talk sensitivity is critical. |
| SW2 (Pin 14) | Switch node for CH2 | CH2 counterpart to SW1; requires symmetric layout and separate LC filter. |
| VBST2 (Pin 15) | Bootstrap supply for CH2 high-side gate | Same function as VBST1; requires dedicated 0.1 µF capacitor to SW2. |
| VIN2 (Pin 16) | Power input for CH2 | Independent input rail; supports split-input architectures or redundancy; shares PowerPAD™ thermal path. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ Control Mode | Eliminates external compensation components and enables stable operation with ceramic or POSCAP output capacitors - reducing BOM count and board space. |
| Non-Sinking Pre-Biased Soft Start | Prevents reverse current flow into pre-charged outputs during startup - essential for hot-swap and multi-rail sequencing applications. |
| Loss-Less Low-Side Current Sensing | Uses rDS(on) of low-side FET for OCP without sense resistors - improves efficiency and avoids power loss and layout sensitivity. |
| Auto-Skip Eco-mode™ | Transitions seamlessly from PWM to pulse-skipping at light loads - maintains >85% efficiency down to 1 mA output current. |
| Thermally Compensated OCP | Adjusts current limit threshold vs. junction temperature (4000 ppm/°C) - ensures consistent trip point across –40°C to 125°C operating range. |
| Independent Dual Channels | Separate VIN, EN, PG, VFB, and PGND pins per channel - enables flexible power tree design, fault isolation, and independent sequencing. |
Applications
| Digital TV Power Supply | Networking Home Terminal |
|---|---|
Use Scenario: Powers SoC core (1.2 V), memory interface (1.5 V), and HDMI PHY (3.3 V) from single 12 V input in compact set-top box PCB. IC Role / Device Role / Timing Role: Dual-channel buck regulator delivering tightly regulated, sequenced rails with independent power-good signaling. Use Value: Replaces two discrete converters; reduces component count by 35% and enables <12 mm² solution size with 92% peak efficiency. | Use Scenario: Supplies FPGA I/O bank (2.5 V), transceiver core (1.0 V), and USB controller (3.3 V) in DSL/cable modem with strict thermal limits. IC Role / Device Role / Timing Role: Dual synchronous buck with independent EN control enabling dynamic rail enable/disable based on traffic load. Use Value: Achieves <15 mV output ripple at 2 A using 22 µF ×2 ceramic caps; supports Eco-mode™ for <25 µA quiescent current in sleep state. |
| Digital Set Top Box (STB) | Gaming Console Subsystem |
Use Scenario: Generates 1.1 V CPU core and 1.8 V GPU rails from 12 V input in thermally constrained STB enclosure with no forced air. IC Role / Device Role / Timing Role: Dual-channel regulator with shared thermal pad and independent PG outputs for system-level health monitoring. Use Value: Delivers 2.5 W/channel with ≤45°C rise above ambient; PowerPAD™ enables direct thermal coupling to inner ground plane. | Use Scenario: Powers audio codec (3.3 V), sensor hub (1.8 V), and wireless module (1.2 V) in handheld gaming peripheral with battery backup. IC Role / Device Role / Timing Role: Dual buck with pre-biased soft start and hiccup-mode OCP - prevents brownout during sudden load surges. Use Value: Sustains 3 A peak load on CH2 without shutdown; hiccup timer limits average power dissipation during sustained overload. |
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 |
|---|---|---|---|
| TPS542951PWP | Same pinout and package; supports 3 A/4 A (CH1/CH2) with higher Rds(on) FETs (120 mΩ HS / 70 mΩ LS). | Higher current capability but lower efficiency at light loads due to increased conduction loss. | Select when CH2 load exceeds 3 A or when tighter output voltage accuracy (±0.5%) is required. |
| MP2494DS-LF-Z | Monolithic dual buck in QFN-20; fixed 500 kHz frequency; no D-CAP2™, requires external compensation. | Lacks pre-biased soft start and loss-less current sensing; lower integration (no VREG5 LDO). | Choose for cost-sensitive designs where 700 kHz switching and ceramic-cap stability are not mandatory. |
Compared with TPS542951PWP and MP2494DS-LF-Z, the TPS542941PWP offers superior light-load efficiency via Eco-mode™, eliminates compensation components via D-CAP2™, and provides integrated VREG5 - making it optimal for space-constrained, multi-rail consumer electronics requiring fast transient response and sequencing flexibility.
Availability
TPS542941PWP is available at Aetrix Electronics and suitable for digital TV power supplies, networking home terminals, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and production-ready qualification.
Supply support for TPS542941PWP 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 consumer, computing, and communications equipment where fast transient response and thermal reliability are critical.
FAQ
What is the recommended input capacitor configuration for TPS542941PWP?
TI recommends a minimum 10 µF ceramic bulk capacitor plus a 0.1 µF ceramic capacitor placed directly between each VIN pin (Pin 1 and Pin 16) and PGND. The 0.1 µF capacitors must be X5R/X7R dielectric and located as close as possible to the respective VIN–PGND pair to suppress high-frequency switching noise and stabilize the bootstrap circuit. Total effective capacitance should exceed 12 µF with ≤5 mΩ ESL for full 18 V input operation.
Does TPS542941PWP support independent voltage sequencing between Channel 1 and Channel 2?
Yes, TPS542941PWP supports full independent sequencing via separate EN1 and EN2 pins, individual soft-start timers, and distinct PG1 and PG2 outputs. Each channel ramps up its output voltage independently after its respective EN pin rises above 2.0 V, with no internal coupling - enabling precise power-up order (e.g., VO2 before VO1) and fault isolation in multi-rail systems.
Can TPS542941PWP operate with ceramic output capacitors only?
Yes, TPS542941PWP is explicitly designed for ceramic output capacitors using D-CAP2™ control. Its internal compensation and zero-ripple simulation eliminate reliance on ESR for loop stability. TI validates operation with 20–68 µF total ceramic capacitance (e.g., two 22 µF X5R 0805s), achieving <15 mV p-p ripple at 2 A load without added series resistance.
What is the thermal performance of TPS542941PWP in HTSSOP-16 package?
TPS542941PWP in HTSSOP-16 (PWP) achieves θJA = 47.5°C/W with standard 2-layer JEDEC test board and full PowerPAD™ soldering. With 2 oz copper and 4 thermal vias under the pad, junction-to-ambient rise is ≤35°C at 2.5 W total dissipation (CH1+CH2). Derating begins above 125°C TJ; thermal shutdown activates at 155°C with 25°C hysteresis.
How does the loss-less current sensing work in TPS542941PWP?
TPS542941PWP senses output current by measuring the voltage drop across the integrated low-side MOSFET's rDS(on) during its on-time - eliminating external sense resistors. This voltage is amplified and compared to a thermally compensated reference. The 4000 ppm/°C compensation ensures consistent current-limit threshold from –40°C to 125°C, with typical OCL thresholds of 3.9 A (CH1) and 4.7 A (CH2) at 25°C.
TPS542941PWP 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, 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
TPS542941PWP FAQ
1.How can I place an order for TPS542941PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS542941PWP 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 TPS542941PWP reliable?
The price and inventory of TPS542941PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS542941PWP is usually 5 days.
3.What payment methods are accepted for TPS542941PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS542941PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS542941PWP?
TPS542941PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS542941PWP 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 TPS542941PWP?
For technical support, including TPS542941PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS542941PWP requirements.
6.How does Aetrix verify that TPS542941PWP is sourced from the original manufacturer or authorized distributors?
All TPS542941PWP 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 TPS542941PWP meets industry standards.
7.What is the process for return or replacement of TPS542941PWP?
All TPS542941PWP units undergo pre-shipment inspection (PSI). If there is an issue with TPS542941PWP, 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 TPS542941PWP part is unused and in its original packaging.
Return procedure for TPS542941PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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