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Texas Instruments TPS54541DPRT
- Part No.:
- TPS54541DPRT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
TPS54541DPRT.pdf
- Description:
- IC REG BCK SPLIT RAIL ADJ 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,386
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Product details
Overview
TPS54541DPRT from Texas Instruments is a 4.5-V to 42-V input, 5-A synchronous step-down DC-DC converter with integrated 87-mΩ high-side MOSFET, Eco-mode™ pulse-skipping for light-load efficiency, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated 0.8-V to 41.1-V output in industrial power systems requiring robust load-dump survival (up to 45 V per ISO 7637) and precise sequencing.
For engineers reviewing the TPS54541DPRT datasheet, TPS54541DPRT pinout, TPS54541DPRT application, or TPS54541DPRT equivalent, key selection criteria include its 152-μA no-load quiescent current, 0.8-V ±1% internal reference, UV/OV power-good monitoring, soft-start/tracking capability, and WSON-10 thermal-pad package for high-power-density designs.
Technical Context
The TPS54541DPRT implements constant-frequency peak-current-mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its RT/CLK pin supports both resistor-programmed frequency (100–2500 kHz) and external clock synchronization via PLL, enabling noise-sensitive system integration.
It features integrated BOOT recharge FET, enabling near-100% duty-cycle operation down to ~0.2-V dropout; an EN pin with adjustable UVLO (4.3-V default, programmable via resistor divider); and a PWRGD open-drain output asserting low when FB falls outside 93–106% of nominal regulation - all within a –40°C to 150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports 12-V and 24-V industrial/automotive rails and survives ISO 7637 load dump pulses up to 45 V. |
| Output Current | 5 A continuous - delivered via integrated 87-mΩ high-side MOSFET with thermal pad for reliable high-current operation. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock; enables optimization of efficiency vs. size of inductors/capacitors. |
| Quiescent Current | 152 μA (no-load, non-switching) - enables ultra-low standby power in always-on systems. |
| Reference Voltage | 0.8 V ±1% - sets minimum output voltage; used with FB resistor divider for precise output programming. |
| Power-Good Threshold | FB = 93% to 106% of nominal - provides accurate output regulation monitoring with hysteresis for stable system sequencing. |
| Shutdown Current | 2 μA - ensures minimal battery drain during disable mode in portable or automotive applications. |
Pinout & Package
TPS54541DPRT uses a 10-pin WSON package (4.0 mm × 4.0 mm) with exposed thermal pad (Pin 11), optimized for high thermal performance in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Drives high-side MOSFET gate; requires 0.1-μF ceramic capacitor to SW for gate bias; monitored by internal UVLO to prevent shoot-through. |
| VIN | Main input supply | Accepts 4.5–42 V; powers internal circuitry and high-side driver; includes overvoltage protection up to 45 V. |
| GND | Power and signal ground | Common return path; must be connected to exposed thermal pad for thermal and electrical integrity. |
| SW | Switching node | Source of internal high-side MOSFET; connects to external inductor and bootstrap capacitor; carries high di/dt switching current. |
| FB | Feedback input | Inverting input of transconductance error amplifier; senses output voltage via resistor divider to regulate 0.8-V reference. |
| COMP | Error amplifier output | Drives PWM comparator; connects to external RC compensation network for loop stability across operating conditions. |
| EN | Enable control | Pull below 1.2 V to disable; floating enables device; supports programmable UVLO using external resistor divider. |
| RT/CLK | Frequency control | Resistor-to-ground sets switching frequency (100–2500 kHz); pulled above threshold becomes high-Z clock input synchronized via internal PLL. |
| SS/TR | Soft-start & tracking | Capacitor sets output ramp time; supports power sequencing and tracking of other supplies via external resistor networks. |
| PWRGD | Power-good indicator | Open-drain output asserts low when FB is outside 93–106% of target; used for system enable/disable coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces no-load input current to 152 μA by disabling switching until output droop triggers recovery - critical for battery-backed or energy-harvesting systems. |
| Integrated BOOT recharge FET | Enables >99% duty-cycle operation without external diode, supporting ultra-low dropout (e.g., 12 V → 11.8 V) while maintaining gate drive integrity. |
| Adjustable UVLO with hysteresis | Default 4.3 V start-up with 325 mV hysteresis; programmable via EN pin resistors to match system-level brown-out thresholds. |
| UV/OV power-good monitoring | PWRGD asserts only when output is tightly regulated (±7% window), eliminating false fault signals during transient load steps or startup overshoot. |
| Current-mode control with slope compensation | Ensures stable operation at >50% duty cycle without external compensation components - simplifies design for wide VIN/VOUT ratios. |
Applications
| Industrial Motor Control Power | Automotive GPS & Infotainment |
|---|---|
Use Scenario: Powers microcontrollers, gate drivers, and sensors in PLC I/O modules and servo amplifiers where input voltage varies from 12 V to 36 V under load dump. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V or 5 V from unregulated 24-V rail; manages sequencing with SS/TR pin during cold crank. Use Value: Survives 45-V load dump transients per ISO 7637; maintains regulation during 0.5-V input dips; enables fast restart after thermal shutdown via controlled soft-start. | Use Scenario: Supplies USB charging ports and infotainment head units in vehicles with wide battery voltage range (9 V–16 V) and stringent EMI requirements. IC Role / Device Role / Timing Role: High-efficiency 5-V/3.3-V point-of-load regulator; synchronized to system clock via RT/CLK pin to avoid beat frequencies in audio subsystems. Use Value: Achieves >90% efficiency at 1-A load with 400-kHz switching; Eco-mode reduces quiescent draw to <200 μA in sleep mode; PWRGD coordinates MCU wake-up timing. |
| USB Dedicated Charging Port | 12-V/24-V Communications Equipment |
Use Scenario: Implements BC1.2-compliant USB charging in docking stations and industrial tablets powered from 12-V adapters. IC Role / Device Role / Timing Role: Adjustable-output buck converter (set to 5.1 V) with precise voltage regulation and current limiting; soft-start prevents inrush into large output capacitance. Use Value: 0.8-V reference tolerance (±1%) ensures ±50-mV output accuracy; COMP pin allows dynamic current limit adjustment; thermal shutdown protects against sustained overload. | Use Scenario: Provides isolated 3.3-V and 5-V rails for Ethernet PHYs, PoE controllers, and FPGA configuration in telecom edge devices. IC Role / Device Role / Timing Role: Secondary-stage buck regulator accepting 12-V or 24-V intermediate bus; configured for 500-kHz switching to minimize EMI in dense board layouts. Use Value: WSON-10 package with thermal pad sustains 5-A load at 70°C ambient; RT/CLK synchronization avoids interference with 100-MHz Ethernet clocks; PWRGD validates rail readiness before link initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143APWPR | 42-V, 5-A synchronous buck with spread-spectrum EMI reduction; higher 2.2-MHz max frequency; no Eco-mode; 2.1-V min dropout. | Better suited for EMI-critical RF modules; lacks light-load efficiency optimization for always-on nodes. | Select LM5143APWPR when EMI compliance dominates over standby power; avoid if >152-μA IQ is unacceptable. |
| MPQ4333GQ-A | 40-V, 5-A buck with 170-mΩ high-side FET; 25-μA IQ in skip mode; fixed 500-kHz frequency; no RT/CLK sync or PWRGD. | Lower BOM cost but limited flexibility; missing power-good signaling and frequency synchronization for multi-rail systems. | Select MPQ4333GQ-A for cost-sensitive, single-rail applications without sequencing or clock sync needs. |
Compared with LM5143APWPR and MPQ4333GQ-A, the TPS54541DPRT uniquely balances light-load efficiency (152-μA IQ), full-feature sequencing (SS/TR + PWRGD), and system-level noise control (PLL sync), making it optimal for multi-rail industrial and automotive power management.
Availability
TPS54541DPRT is available at Aetrix Electronics and suitable for industrial motor control, automotive infotainment, USB charging ports, and 12-V/24-V communications equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS54541DPRT 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 technologies with over 90 years of innovation in high-reliability power conversion.
The TPS54541DPRT belongs to TI's SWIFT™ family of high-current DC-DC converters designed for rugged industrial and automotive applications demanding wide input range, load-dump resilience, and precise power sequencing.
FAQ
What is the maximum input voltage the TPS54541DPRT can withstand during load dump events?
The TPS54541DPRT is rated to survive load dump pulses up to 45 V per ISO 7637 standard. Its absolute maximum VIN rating is 45 V, and the internal circuitry remains functional under transient overvoltage conditions within this limit - ensuring reliability in automotive and industrial environments where battery voltage surges occur.
How does the Eco-mode™ function improve efficiency at light loads in the TPS54541DPRT?
The TPS54541DPRT enters Eco-mode™ when output load drops below ~18 mA (dependent on inductor value), skipping switching cycles to reduce gate drive and switching losses. This lowers no-load input current to 152 μA - significantly extending battery life in always-on applications compared to forced-PWM operation.
Can the TPS54541DPRT operate with a 12-V input and 11.5-V output, and what design considerations apply?
Yes, the TPS54541DPRT supports near-100% duty cycle operation down to ~0.2-V dropout thanks to its integrated BOOT recharge FET. For 12-V → 11.5-V conversion, ensure BOOT-SW voltage stays >2.1 V using a 0.1-μF X7R ceramic capacitor; verify thermal performance with RθJB = 12.3°C/W under full load.
What is the purpose of the SS/TR pin on the TPS54541DPRT, and how is it used in power sequencing?
The SS/TR pin on the TPS54541DPRT controls output voltage ramp rate during startup (soft-start) and enables tracking of another supply's voltage profile (tracking). Connecting an external capacitor sets rise time; adding a resistor divider allows precise coordination with upstream/downstream rails - essential for FPGA or multi-core processor power sequencing.
Does the TPS54541DPRT provide power-good status, and how is the PWRGD signal asserted?
Yes, the TPS54541DPRT provides an open-drain PWRGD signal that asserts low when the FB voltage falls outside 93% to 106% of the nominal output. It remains high only when regulation is confirmed - enabling safe system enablement, reset coordination, and fault detection without external comparators.
TPS54541DPRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 10-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Split Rail
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 41V
- Current - Output:
- 5A
- Frequency - Switching:
- 100kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (4x4)
TPS54541DPRT FAQ
1.How can I place an order for TPS54541DPRT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54541DPRT 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 TPS54541DPRT reliable?
The price and inventory of TPS54541DPRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54541DPRT is usually 5 days.
3.What payment methods are accepted for TPS54541DPRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54541DPRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54541DPRT?
TPS54541DPRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54541DPRT 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 TPS54541DPRT?
For technical support, including TPS54541DPRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54541DPRT requirements.
6.How does Aetrix verify that TPS54541DPRT is sourced from the original manufacturer or authorized distributors?
All TPS54541DPRT 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 TPS54541DPRT meets industry standards.
7.What is the process for return or replacement of TPS54541DPRT?
All TPS54541DPRT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54541DPRT, 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 TPS54541DPRT part is unused and in its original packaging.
Return procedure for TPS54541DPRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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