My Inquiry
My Account
Texas Instruments TPS54361DPRT
- Part No.:
- TPS54361DPRT
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
TPS54361DPRT.pdf
- Description:
- IC REG BCK SPLIT RAIL ADJ 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:419
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54361 from Texas Instruments is a 4.5-V to 60-V input, 3.5-A synchronous step-down DC-DC converter with integrated 89-mΩ high-side N-channel MOSFET, Eco-Mode™ pulse-skipping for light-load efficiency, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated output voltages as low as 0.8 V with ±1% reference accuracy and supports industrial power systems requiring robust load-dump survival (65 V per ISO 7637).
For engineers reviewing the TPS54361 datasheet, TPS54361 pinout, TPS54361 application, or TPS54361 equivalent, key selection considerations include its wide VIN range, internal BOOT recharge FET enabling near-100% duty cycle operation, open-drain PWRGD with 93–106% output window, and RT/CLK pin supporting both resistor-set frequency and external clock synchronization.
Technical Context
The TPS54361 implements constant-frequency current-mode control with slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its error amplifier features 350-μS transconductance and 10,000 V/V DC gain, with COMP pin directly controlling PWM comparator threshold and enabling precise loop compensation via external RC networks.
Functional safety features include cycle-by-cycle current limiting (5.5 A typical), thermal shutdown at 176°C with 12°C hysteresis, UV/OV protection on PWRGD, and BOOT-SW UVLO monitoring. The EN pin supports adjustable undervoltage lockout (4.3 V default) and enables sequencing via external resistor dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports 12-V, 24-V, and 48-V industrial/automotive rails and survives ISO 7637 load dump pulses up to 65 V. |
| Output Current | 3.5 A continuous - enabled by integrated 89-mΩ high-side MOSFET and thermal pad in WSON package. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT/CLK pin resistor or external clock; allows optimization of efficiency vs. size of output filter components. |
| Quiescent Current | 152 μA (no-load operating), 2 μA (shutdown) - enables battery-backed or always-on systems with minimal standby loss. |
| Reference Voltage | 0.8 V ±1% - sets minimum output voltage; FB pin feedback enables precise regulation across full output range (0.8 V to 58.8 V). |
| Power Good Accuracy | 93% to 106% of nominal VOUT - open-drain PWRGD asserts low outside this window, enabling reliable system power sequencing and fault detection. |
| Operating Junction Temp | –40°C to 150°C - qualified for under-hood automotive, motor drives, and industrial environments with high ambient thermal stress. |
Pinout & Package
TPS54361 is housed in a thermally enhanced 10-pin WSON (DPR) package measuring 4.00 mm × 4.00 mm with an exposed thermal pad that must be soldered to PCB ground for proper thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects external capacitor between BOOT and SW to generate gate drive voltage for high-side MOSFET; includes internal recharge FET for high-duty-cycle operation. |
| VIN | Main input power rail | Accepts 4.5–60 V DC input; supplies internal bias circuitry and high-side driver; withstands transient overvoltage up to 65 V. |
| GND | Power and signal reference | Common return path for power stage, control logic, and thermal pad connection; critical for noise immunity and thermal dissipation. |
| SW | Switching node | Drain of internal high-side MOSFET and source of external low-side inductor; connects to external bootstrap capacitor and output filter. |
| FB | Feedback sensing input | Inverting input of transconductance error amplifier; monitors output voltage via resistor divider to maintain regulation against load/line changes. |
| COMP | Error amplifier output | Direct interface for external compensation network (R-C); controls PWM comparator threshold and determines loop stability and transient response. |
| EN | Enable and UVLO control | Pull low (<1.2 V) to disable; floating enables device; external resistor divider adjusts UVLO threshold and hysteresis for custom start-up behavior. |
| RT/CLK | Frequency programming/sync | Resistor-to-ground sets switching frequency (100 kHz–2.5 MHz); pulled above 1.55 V to accept external clock edges for synchronization. |
| SS/TR | Soft-start and tracking | Capacitor sets output ramp time; voltage override enables power sequencing and tracking of other rails during startup or fault recovery. |
| PWRGD | Power-good status indicator | Open-drain output asserting low when FB voltage falls outside 93–106% window; used for system enable/disable and fault signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-Mode™ pulse skipping | Reduces no-load quiescent current to 152 μA by disabling switching while maintaining regulation via controlled burst mode. |
| Integrated BOOT recharge FET | Enables >95% duty cycle operation without external diode, allowing VOUT close to minimum VIN (e.g., 12 V → 11.5 V). |
| Adjustable UVLO with hysteresis | EN pin supports programmable start-up voltage (e.g., 12 V system with 10 V turn-on/8 V turn-off) using two resistors. |
| Internal 0.8-V ±1% reference | Provides stable regulation baseline; combined with FB divider, achieves tight output tolerance across temperature and load. |
| Current-mode control with slope compensation | Ensures stable operation at duty cycles >50%; eliminates need for external compensation components in most designs. |
Applications
| Industrial Motor Drives | Automotive Infotainment Systems |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and display drivers in PLC I/O modules and servo drive controllers. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V point-of-load regulator converting 24-V or 48-V bus with high reliability under EMI-rich motor switching noise. Use Value: 152-μA quiescent current extends standby time; 150°C junction rating ensures operation near heat-generating power stages. |
Use Scenario: Supplying GPS modules, audio amplifiers, and touchscreen controllers in vehicle head units and rear-seat entertainment. IC Role / Device Role / Timing Role: Buck converter handling cold-crank (4.5 V) and load-dump (65 V) transients while maintaining clean 5-V/3.3-V outputs. Use Value: Integrated BOOT recharge FET sustains regulation during deep dropout; PWRGD enables safe system reset on overvoltage events. |
| USB Dedicated Charging Ports | Communications Equipment Power |
Use Scenario: Delivering 5-V/2-A USB BC1.2 compliant charging from 12-V vehicle battery or PoE-derived 48-V input. IC Role / Device Role / Timing Role: Constant-current/constant-voltage pre-regulator feeding secondary USB PD controller; soft-start prevents inrush into large output capacitance. Use Value: Adjustable RT/CLK allows 400-kHz operation for optimal efficiency at 5-V/2-A; SS/TR pin enables precise charge port sequencing. |
Use Scenario: Generating isolated or non-isolated 3.3-V, 5-V, and 12-V rails in 4G/5G base station radios and optical line terminals. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter stepping down 48-V telecom input to lower-voltage processor/memory domains. Use Value: 2.5-MHz max switching frequency minimizes inductor size; thermal pad enables conduction cooling in dense RF chassis layouts. |
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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5–65-V input, 1-A output, 1.5-MHz max fSW, no integrated BOOT diode; requires external bootstrap diode. | Lower current rating and no Eco-Mode; better suited for space-constrained 1-A applications where ultra-low IQ is not required. | Select LM5164QPWPRQ1 only if 1-A output suffices and board layout permits external diode; TPS54361 preferred for 3.5-A + Eco-Mode + BOOT FET integration. |
| MP2451DT-LF-Z | 4.5–36-V input, 0.6-A output, fixed 2-MHz fSW, no PWRGD or adjustable UVLO; 16-V absolute max VIN. | Not suitable for 48-V or load-dump environments; lacks sequencing, soft-start, and power-good functions. | MP2451DT-LF-Z is viable only for low-power 12-V systems with simple requirements; TPS54361 provides full feature set for demanding industrial/automotive use. |
Compared with LM5164QPWPRQ1 and MP2451DT-LF-Z, the TPS54361 uniquely combines 3.5-A capability, Eco-Mode efficiency, integrated BOOT recharge FET, and ISO 7637-compliant 65-V transient tolerance-making it the only option among the three qualified for high-reliability 24/48-V industrial and automotive power rails.
Availability
TPS54361 is available at Aetrix Electronics and suitable for industrial motor control, automotive infotainment, USB charging ports, and communications equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS54361 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 decades of automotive and industrial qualification expertise.
The TPS54361 belongs to TI's high-voltage buck converter product line, designed specifically for ruggedized power conversion in 12-V, 24-V, and 48-V systems subject to load dump, cold crank, and wide temperature variation.
FAQ
What is the maximum input voltage the TPS54361 can withstand during transient conditions?
The TPS54361 is rated to survive load dump pulses up to 65 V per ISO 7637 standard. Its absolute maximum VIN rating is 65 V, and it operates continuously from 4.5 V to 60 V. This makes the TPS54361 suitable for automotive and industrial applications where battery voltage surges occur. The device maintains regulation and protects internal circuitry without external clamping components under these transient conditions.
Does the TPS54361 require an external bootstrap diode?
No, the TPS54361 does not require an external bootstrap diode. It integrates a BOOT recharge FET that automatically refreshes the bootstrap capacitor during low-side conduction, enabling high-duty-cycle operation (up to ~98%) without additional components. This simplifies design, reduces BOM count, and improves reliability compared to controllers requiring discrete bootstrap diodes.
How does Eco-Mode™ improve light-load efficiency in the TPS54361?
Eco-Mode™ in the TPS54361 reduces no-load quiescent current to 152 μA by entering pulse-skipping mode when output load drops below ~25 mA. In this mode, switching ceases until output voltage decays enough to trigger a burst of switching cycles, minimizing gate drive and switching losses. The TPS54361 resumes full PWM operation automatically once load increases, ensuring seamless transition without user intervention.
Can the TPS54361 synchronize to an external clock signal?
Yes, the TPS54361 supports external clock synchronization via the RT/CLK pin. When the pin voltage exceeds 1.55 V, the internal oscillator disables and the pin becomes a high-impedance clock input to the internal PLL. Clock edges must meet minimum pulse width (15 ns) and frequency range (160–2300 kHz). This enables deterministic timing across multiple converters in noise-sensitive or EMI-constrained systems.
What is the purpose of the SS/TR pin on the TPS54361?
The SS/TR (Soft-Start/Tracking) pin on the TPS54361 serves dual functions: connecting a capacitor sets the output voltage ramp time to limit inrush current, while connecting a resistor divider enables precise power supply sequencing or tracking of another rail. During faults or shutdown, the pin discharges to ensure repeatable restart behavior. This flexibility makes the TPS54361 ideal for multi-rail systems requiring controlled power-up order.
TPS54361DPRT 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):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 60V
- Current - Output:
- 3.5A
- 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)
TPS54361DPRT FAQ
1.How can I place an order for TPS54361DPRT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54361DPRT 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 TPS54361DPRT reliable?
The price and inventory of TPS54361DPRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54361DPRT is usually 5 days.
3.What payment methods are accepted for TPS54361DPRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54361DPRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54361DPRT?
TPS54361DPRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54361DPRT 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 TPS54361DPRT?
For technical support, including TPS54361DPRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54361DPRT requirements.
6.How does Aetrix verify that TPS54361DPRT is sourced from the original manufacturer or authorized distributors?
All TPS54361DPRT 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 TPS54361DPRT meets industry standards.
7.What is the process for return or replacement of TPS54361DPRT?
All TPS54361DPRT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54361DPRT, 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 TPS54361DPRT part is unused and in its original packaging.
Return procedure for TPS54361DPRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54361DPRT 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…
