My Inquiry
My Account
Texas Instruments TPS54541DPRR
- Part No.:
- TPS54541DPRR
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
TPS54541DPRR.pdf
- Description:
- IC REG BCK SPLIT RAIL ADJ 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,269
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54541 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 via SS/TR pin.
For engineers reviewing the TPS54541 datasheet, TPS54541 pinout, TPS54541 application, or TPS54541 equivalent, key selection criteria include its 152-μA no-load quiescent current, 0.8-V ±1% internal reference, UV/OV power-good monitoring, adjustable undervoltage lockout, and thermal shutdown protection across –40°C to 150°C junction temperature.
Technical Context
The TPS54541 implements constant-frequency peak-current-mode control with internal slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its RT/CLK pin supports both resistor-programmed frequency (100–2500 kHz) and external clock synchronization via PLL, enabling EMI reduction in noise-sensitive systems.
Current-mode architecture provides inherent cycle-by-cycle overcurrent protection, while the integrated BOOT recharge FET enables low-dropout operation near 100% duty cycle. The error amplifier features 350-μS transconductance and 10,000 V/V DC gain, with soft-start and tracking functionality implemented through voltage-controlled discharge of the SS/TR capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports 12-V and 24-V automotive/industrial rails and survives ISO 7637 load dump pulses up to 45 V. |
| Output Current | 5 A continuous - enabled by integrated 87-mΩ high-side MOSFET and thermal pad-enhanced WSON package. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock; allows optimization of efficiency vs. filter size. |
| Quiescent Current | 152 μA (no-load, non-switching) - enables battery-backed or always-on systems with minimal standby loss. |
| Reference Voltage | 0.8 V ±1% - sets minimum output; enables precise regulation down to 0.8 V or higher via FB resistor divider. |
| Power-Good Accuracy | ±7% window (93%–106% of nominal) - open-drain PWRGD asserts only when output is within tight regulation band. |
| Operating Temperature | –40°C to 150°C TJ - qualified for under-hood automotive and high-temperature industrial environments. |
Pinout & Package
TPS54541 is housed in a thermally enhanced 10-pin WSON (DPR) package measuring 4.00 mm × 4.00 mm with exposed thermal pad. The pad must be soldered to PCB ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to SW via 0.1-μF ceramic capacitor; supplies gate drive for high-side MOSFET and enables >99% duty cycle operation. |
| VIN | Main input supply | Accepts 4.5–42 V; includes internal 4.3-V UVLO with adjustable hysteresis via EN pin resistor divider. |
| GND | Power and signal reference | Common return for all circuits; thermal pad must be electrically connected to PCB ground plane. |
| EN | Enable and UVLO control | Pull below 1.2 V to disable; floating enables device; external resistors adjust UVLO threshold and hysteresis. |
| SS/TR | Soft-start and tracking input | Capacitor sets output ramp time; resistor divider enables power sequencing with other rails. |
| RT/CLK | Frequency programming/sync | Resistor to GND sets switching frequency; external clock edges synchronize switch turn-on via PLL. |
| SW | Switch node | Drain of internal high-side MOSFET; connects to external inductor and BOOT capacitor. |
| FB | Feedback input | Inverting input of error amplifier; senses output via resistor divider to regulate against 0.8-V reference. |
| COMP | Error amplifier output | Drives PWM comparator; connect compensation network (R-C-Zener) between COMP and FB/GND. |
| PWRGD | Power-good indicator | Open-drain output asserts low if output deviates beyond ±7% or during fault conditions (thermal, UV, OV). |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces no-load input current to 152 μA by disabling switching cycles while maintaining regulation-critical for battery-powered systems. |
| Integrated BOOT recharge FET | Eliminates external diode; enables stable 100% duty cycle operation and low dropout at high VIN-to-VOUT ratios. |
| Adjustable UVLO with hysteresis | EN pin supports custom start-up voltage (e.g., 6 V) and controlled hysteresis (e.g., 400 mV) to prevent brownout oscillation. |
| UV/OV power-good monitoring | PWRGD pin provides system-level fault detection without external comparators-simplifies BOM and improves reliability. |
| Thermal shutdown with hysteresis | Shuts down at 176°C and restarts at 164°C (12°C hysteresis), preventing thermal cycling damage during overload. |
Applications
| Industrial Motor Drives | Automotive Infotainment |
|---|---|
Use Scenario: Powering FPGA, MCU, and interface ICs in servo motor controllers operating from 24-V bus with transient spikes. IC Role / Device Role / Timing Role: Primary 5-V/3.3-V buck regulator delivering clean, sequenced power with load-dump immunity and thermal fault reporting. Use Value: Integrated 45-V tolerant design eliminates need for front-end TVS clamping; PWRGD enables safe shutdown before controller damage. | Use Scenario: Supplying USB charging ports and display subsystems in vehicle head units powered from 12-V battery with cold-crank dips. IC Role / Device Role / Timing Role: High-efficiency 5-V buck converter with Eco-mode for standby power and adjustable UVLO to avoid dropout during cranking. Use Value: 152-μA quiescent current extends battery life in always-connected modules; SS/TR enables synchronized rail startup with audio SoC. |
| USB Dedicated Charging Port | Communications Base Station |
Use Scenario: Delivering BC1.2-compliant 5-V/1.5-A output from 12-V or 24-V input in wall adapters and docking stations. IC Role / Device Role / Timing Role: Constant-current/constant-voltage capable buck stage with precise 0.8-V reference and fast transient response. Use Value: Adjustable switching frequency avoids interference with USB data lines; 5-A rating supports multi-port scaling without derating. | Use Scenario: Generating intermediate 12-V or 5-V rails from 48-V telecom supply in remote radio units with strict thermal constraints. IC Role / Device Role / Timing Role: High-input-voltage buck converter with 35.1°C/W θJA and exposed thermal pad for conduction-cooled enclosures. Use Value: RθJB = 12.3°C/W enables direct heat transfer to PCB ground plane-reducing heatsink requirements and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143AQPWPRQ1 | 42-V, 3.5-A, dual-channel synchronous buck with spread-spectrum EMI reduction and 2.1-MHz max fSW. | Designed for automotive ADAS with AEC-Q100 Grade 1 qualification; lacks Eco-mode but offers lower IQ (15 μA) | Choose for dual-rail systems needing EMI compliance and automotive qualification; not drop-in due to different pinout and control scheme. |
| MP2451DT-LF-Z | 36-V, 0.6-A buck with fixed 2-MHz fSW, no SS/TR or PWRGD, 3.5-μA IQ in shutdown. | Cost-optimized for low-power IoT sensors; lacks sequencing, power-good, and high-current capability. | Choose only for space-constrained, low-IQ applications where 5-A output and rail coordination are unnecessary. |
Compared with LM5143AQPWPRQ1 and MP2451DT-LF-Z, the TPS54541 uniquely balances 5-A output, Eco-mode efficiency, full sequencing support, and industrial-grade thermal performance in a compact WSON package-making it optimal for single-rail, high-reliability embedded power systems.
Availability
TPS54541 is available at Aetrix Electronics and suitable for industrial motor drives, automotive infotainment systems, USB charging ports, and communications base station power supplies requiring stable component supply and long-term lifecycle support.
Supply support for TPS54541 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 ICs.
The TPS54541 belongs to TI's SWIFT™ family of high-voltage buck regulators, designed specifically for rugged industrial and automotive applications demanding wide VIN range, high current, and comprehensive fault protection.
FAQ
What is the maximum input voltage the TPS54541 can withstand during load dump events?
The TPS54541 is rated to survive load dump pulses up to 45 V per ISO 7637, exceeding its 42-V maximum continuous input rating. This transient tolerance is achieved through internal circuitry that clamps and routes surge energy safely, allowing direct use in automotive 12-V and 24-V systems without external TVS diodes in many cases. The TPS54541 maintains functional integrity during these events as long as the duration remains within specification limits defined in the datasheet.
How does the Eco-mode™ function improve light-load efficiency in the TPS54541?
The TPS54541 enters Eco-mode™ when output load current drops below a threshold determined by inductor value and COMP pin voltage (~600 mV). In this mode, the device skips switching cycles while maintaining regulation, reducing gate drive and switching losses. This lowers no-load input current to 152 μA-enabling extended battery life in always-on applications. The TPS54541 resumes normal PWM operation automatically when load increases, ensuring seamless transition without user intervention.
Can the TPS54541 operate with 100% duty cycle, and what design elements enable this?
Yes, the TPS54541 supports near-100% duty cycle operation through its integrated BOOT recharge FET and low-dropout architecture. When BOOT-to-SW voltage falls below 2.1 V, the internal low-side FET pulls SW low to refresh the BOOT capacitor. This eliminates the need for an external bootstrap diode and allows stable regulation even when VOUT approaches VIN (e.g., 12-V input to 11.5-V output). The TPS54541 achieves this while maintaining current-mode control stability and thermal safety.
What is the role of the SS/TR pin in power supply sequencing, and how is it implemented?
The SS/TR pin on the TPS54541 enables both soft-start timing control and precise power-rail sequencing. Connecting a capacitor sets the output voltage ramp time to limit inrush current. For sequencing, a resistor divider from a master rail to SS/TR forces the TPS54541 output to track that rail's voltage-ensuring correct power-up order in multi-rail systems like FPGAs or processors. During faults, SS/TR discharges fully, guaranteeing repeatable restart behavior. This dual functionality is built into the TPS54541's internal error amplifier architecture.
How does the PWRGD output indicate valid regulation, and what fault conditions trigger its assertion?
The PWRGD pin on the TPS54541 is an open-drain output that pulls low when the FB voltage falls outside the 93%–106% window of the nominal output voltage. It asserts low during undervoltage (UV), overvoltage (OV), thermal shutdown, or EN-induced shutdown. The TPS54541 monitors FB continuously and updates PWRGD within microseconds-providing real-time system-level health feedback. External pull-up is required; typical use connects PWRGD to microcontroller reset or supervisor IC inputs for coordinated system response.
TPS54541DPRR 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)
TPS54541DPRR FAQ
1.How can I place an order for TPS54541DPRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54541DPRR 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 TPS54541DPRR reliable?
The price and inventory of TPS54541DPRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54541DPRR is usually 5 days.
3.What payment methods are accepted for TPS54541DPRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54541DPRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54541DPRR?
TPS54541DPRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54541DPRR 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 TPS54541DPRR?
For technical support, including TPS54541DPRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54541DPRR requirements.
6.How does Aetrix verify that TPS54541DPRR is sourced from the original manufacturer or authorized distributors?
All TPS54541DPRR 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 TPS54541DPRR meets industry standards.
7.What is the process for return or replacement of TPS54541DPRR?
All TPS54541DPRR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54541DPRR, 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 TPS54541DPRR part is unused and in its original packaging.
Return procedure for TPS54541DPRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54541DPRR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
