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Texas Instruments TPS54360BDDA
- Part No.:
- TPS54360BDDA
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54360BDDA.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:967
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Product details
Overview
TPS54360BDDA from Texas Instruments is a 60-V input, 3.5-A synchronous step-down DC/DC converter with integrated 92-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 output voltages as low as 0.8 V in industrial power supplies requiring wide VIN range and thermal robustness up to 150°C junction temperature.
For engineers reviewing the TPS54360BDDA datasheet, TPS54360BDDA pinout, TPS54360BDDA application, or TPS54360BDDA equivalent, key selection criteria include its 4.5–60-V input range, 146-μA no-load quiescent current, internal 0.8-V ±1% reference, BOOT-recharge FET for high-duty-cycle operation, and RT/CLK pin synchronization capability.
Technical Context
The TPS54360BDDA implements fixed-frequency peak-current-mode control with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its transconductance error amplifier (350 μS typical) drives the COMP pin to regulate FB voltage against a 0.8-V reference, while internal soft-start (2.1 ms at 500 kHz) controls output ramp rate.
Switching is governed by an internal PLL on the RT/CLK pin-operating either in resistor-timed mode (100–2500 kHz) or external clock sync mode (160–2300 kHz). Overvoltage protection disables the high-side MOSFET if VOUT exceeds 106% of regulation, and frequency foldback activates during overcurrent or startup to limit inductor current.
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 bus rails with 65-V absolute max rating. |
| Output Current | 3.5 A continuous - sustains full load across –40°C to 150°C junction temperature without derating. |
| Switching Frequency | 100 kHz to 2.5 MHz - adjustable via RT resistor or external clock; enables optimization of efficiency vs. size. |
| Quiescent Current | 146 μA in Eco-mode - minimizes standby power in battery-backed or always-on systems. |
| Reference Voltage | 0.8 V ±1% - sets minimum output voltage; enables precise regulation with external resistor divider. |
| High-Side RDS(on) | 92 mΩ typical at VBOOT–VSW = 6 V - reduces conduction loss and improves thermal performance at high load. |
| Shutdown Current | 2.25 μA max - ensures ultra-low leakage when EN pin is pulled low. |
| UVLO Threshold | 4.3 V rising with 325-mV hysteresis - prevents erratic startup during brownout; adjustable via EN resistive divider. |
Pinout & Package
TPS54360BDDA uses an 8-pin HSOIC (DDA) package with exposed PowerPAD™ thermal pad (9th terminal), measuring 4.89 mm × 3.90 mm. The PowerPAD must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (Pin 1) | Bootstrap capacitor node | Supplies gate drive for high-side MOSFET; requires 0.1-μF X7R/X5R ceramic capacitor to SW; monitored for UVLO. |
| VIN (Pin 2) | Main input supply | Accepts 4.5–60-V DC; powers internal circuitry and high-side driver; decoupling required near pin. |
| EN (Pin 3) | Enable control input | Pull below 1.2 V to disable; float or pull above 1.2 V to enable; supports adjustable UVLO with two resistors. |
| RT/CLK (Pin 4) | Frequency programming/sync input | Resistor-to-ground sets fSW; >1.55 V triggers PLL sync mode; high-impedance clock input when synchronized. |
| FB (Pin 5) | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) to 0.8-V reference. |
| COMP (Pin 6) | Error amplifier output | Drives PWM comparator; connects to external compensation network (R-C-C) for loop stability. |
| GND (Pin 7) | Power and signal ground | Common return for VIN, SW, and internal circuits; must connect to PowerPAD for thermal path. |
| SW (Pin 8) | Switching node | Source of internal high-side MOSFET; connects to external inductor and bootstrap capacitor; high dv/dt node. |
| PowerPAD (Thermal Pad) | Thermal and electrical ground | Must be soldered to large PCB copper area tied to GND; reduces θJA to 42°C/W and improves reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Eco-mode™ pulse skipping | Reduces no-load IQ to 146 μA by disabling switching until output droop triggers recovery - critical for energy-sensitive remote sensors. |
| Integrated BOOT recharge FET | Enables >95% duty cycle operation without external diode; recharges BOOT capacitor during low-side conduction - supports low-VOUT/high-VIN dropout. |
| Adjustable UVLO with hysteresis | EN pin accepts resistor divider to set custom start/stop thresholds (e.g., 12 V start / 10.5 V stop); 3.4-μA hysteresis current ensures clean release. |
| Accurate cycle-by-cycle current limit | 4.5–6.8 A open-loop limit independent of inductor value; protects against short-circuit and overload without slope compensation dependency. |
| Overvoltage transient protection (OVP) | Disables high-side MOSFET if VOUT exceeds 106% of target; prevents damage to downstream logic or analog circuitry during fault conditions. |
| Internal soft-start | 2.1-ms ramp time at 500 kHz; eliminates inrush current and output overshoot - simplifies input capacitor sizing and EMI filtering. |
Applications
| Industrial Motor Drives | Railway Signaling Systems |
|---|---|
|
Use Scenario: Powering gate drivers and isolated ADCs in 24-V or 48-V motor control inverters where input voltage surges exceed 60 V. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3-V or 5-V rail; handles load transients during PWM switching and withstands ISO 7637-2 pulse 5a surges. Use Value: 60-V max input and 150°C TJ rating ensure uninterrupted operation during bus overvoltage events; Eco-mode extends standby life in idle states. |
Use Scenario: Generating auxiliary 12-V and 5-V supplies from 72-V or 110-V DC traction batteries in onboard signaling modules. IC Role / Device Role / Timing Role: High-input-voltage step-down converter with precise 0.8-V reference enabling accurate output trimming for sensor biasing. Use Value: Adjustable UVLO prevents false shutdown during battery sag; RT/CLK sync allows alignment with system clock to reduce EMI peaks. |
| Telecom Remote Radio Units | Heavy Equipment Telematics |
|
Use Scenario: Converting -48-V telecom rectified bus to +3.3-V for FPGA configuration and RF front-end biasing in outdoor base stations. IC Role / Device Role / Timing Role: Negative-input-capable buck controller (with external level shift) providing isolated, low-noise power for sensitive RF sections. Use Value: 92-mΩ RDS(on) and 3.5-A rating sustain burst loads from PA amplifiers; 2-μA shutdown current preserves backup battery life. |
Use Scenario: Powering GPS, CAN, and cellular modems in construction machinery operating from 24-V lead-acid batteries with wide temperature swings. IC Role / Device Role / Timing Role: Main system regulator supporting cold-crank (4.5-V) to load-dump (60-V) conditions while maintaining 150°C junction capability. Use Value: Thermal shutdown and frequency foldback protect against sustained overloads in dusty, high-ambient environments; PowerPAD ensures long-term solder joint reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down 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 Eco-mode, higher RDS(on) (220 mΩ) | Lower current capacity; suited for space-constrained automotive modules where AEC-Q100 qualification is mandatory | Select LM5164QPWPRQ1 only when automotive-grade reliability and smaller footprint outweigh need for 3.5-A output and Eco-mode efficiency. |
| MP2451DT-LF-Z | 4.5–36-V input, 0.6-A output, fixed 2-MHz fSW, no RT/CLK sync, no BOOT recharge FET | Targeted at low-power consumer electronics; lacks high-VIN capability and high-current support | Choose MP2451DT-LF-Z only for cost-sensitive, low-current designs where 60-V input and 3.5-A delivery are unnecessary. |
Compared with LM5164QPWPRQ1 and MP2451DT-LF-Z, the TPS54360BDDA uniquely combines 60-V input, 3.5-A output, Eco-mode, and BOOT recharge in a thermally enhanced HSOIC package - making it optimal for industrial and transportation systems demanding wide VIN, high current, and low-light-load IQ.
Availability
TPS54360BDDA is available at Aetrix Electronics and suitable for industrial motor drives, railway signaling systems, telecom remote radio units, and heavy equipment telematics requiring stable component supply across extended temperature and voltage ranges.
Supply support for TPS54360BDDA 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 ICs, with decades of expertise in high-reliability power conversion solutions.
The TPS54360BDDA belongs to TI's SWIFT™ family of high-input-voltage DC/DC converters, designed specifically for rugged industrial, transportation, and communications infrastructure applications demanding wide VIN, high efficiency, and thermal resilience.
FAQ
What is the maximum input voltage the TPS54360BDDA can safely handle?
The TPS54360BDDA has an absolute maximum input voltage rating of 65 V on the VIN pin. Its recommended operating input range is 4.5 V to 60 V. Exceeding 65 V risks permanent damage per absolute maximum ratings. Applications with potential load-dump transients (e.g., automotive or industrial 24-V systems) must implement clamping or filtering to ensure VIN stays within this limit during fault conditions. The TPS54360BDDA itself does not include internal overvoltage clamping beyond its rated limits.
How does the TPS54360BDDA achieve high duty cycle operation near 100%?
The TPS54360BDDA achieves high duty cycle operation using an integrated BOOT recharge FET that actively pulls the SW node low during off-time to refresh the BOOT capacitor - eliminating the need for an external diode. This allows sustained conduction of the high-side MOSFET even when VOUT approaches VIN. The device monitors BOOT–SW voltage and disables the high-side switch only when it falls below ~2.1 V, enabling reliable operation down to VOUT ≈ VIN − 0.5 V under typical conditions. The TPS54360BDDA's architecture thus supports low-dropout behavior without external components.
Can the TPS54360BDDA synchronize to an external clock, and how is it configured?
Yes, the TPS54360BDDA synchronizes to an external clock via the RT/CLK pin. When the voltage on RT/CLK exceeds 1.55 V (typical), the internal amplifier disables and the pin becomes a high-impedance clock input to the internal PLL. Clock edges must meet minimum pulse width (15 ns) and fall within 160–2300 kHz. If the external clock stops, the device automatically reverts to resistor-timed mode. This synchronization capability allows the TPS54360BDDA to align switching with other system clocks, reducing beat frequencies and EMI in multi-rail power systems.
What is the purpose of the COMP pin, and how is it used in loop compensation?
The COMP pin is the output of the TPS54360BDDA's transconductance error amplifier and serves as the control node for the PWM comparator. External frequency compensation components - typically a series RC network plus a capacitor to ground - are connected between COMP and GND to stabilize the voltage regulation loop. The amplifier's 350-μS transconductance and 2.5-MHz unity-gain bandwidth allow robust phase margin with standard Type II or Type III networks. During soft-start, COMP references the internal ramp instead of the 0.8-V reference, ensuring controlled output rise. Proper COMP network design is essential for transient response and stability across line/load/temperature.
Does the TPS54360BDDA support adjustable output voltage, and what is the minimum achievable value?
Yes, the TPS54360BDDA supports adjustable output voltage using an external resistor divider from VOUT to the FB pin. The internal reference is 0.8 V ±1%, setting the minimum regulated output voltage. For example, a 10-kΩ lower resistor (RLS) and 49-kΩ upper resistor (RHS) yields 5.0 V output. Output voltages below 0.8 V are not supported, as the feedback loop cannot regulate below the reference. Resistor tolerance (1% or better) and layout (minimizing noise pickup on FB) are critical for accuracy, especially at low output voltages where FB current errors become proportionally significant.
TPS54360BDDA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- 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):
- 58.8V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 100kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
TPS54360BDDA FAQ
1.How can I place an order for TPS54360BDDA through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54360BDDA 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 TPS54360BDDA reliable?
The price and inventory of TPS54360BDDA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54360BDDA is usually 5 days.
3.What payment methods are accepted for TPS54360BDDA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54360BDDA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54360BDDA?
TPS54360BDDA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54360BDDA 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 TPS54360BDDA?
For technical support, including TPS54360BDDA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54360BDDA requirements.
6.How does Aetrix verify that TPS54360BDDA is sourced from the original manufacturer or authorized distributors?
All TPS54360BDDA 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 TPS54360BDDA meets industry standards.
7.What is the process for return or replacement of TPS54360BDDA?
All TPS54360BDDA units undergo pre-shipment inspection (PSI). If there is an issue with TPS54360BDDA, 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 TPS54360BDDA part is unused and in its original packaging.
Return procedure for TPS54360BDDA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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