The TPS54360DDAR from Texas Instruments is a wide-input, nonsynchronous step-down DC-DC converter with an integrated high-side N-channel power MOSFET. It operates from a 4.5V to 60V input and has a 65V absolute-maximum input rating, including the ability to survive load-dump pulses up to 65V under the stated ISO 7637 conditions.
The regulator supports up to 3.5A of continuous output current and has a 4.5A minimum peak-inductor-current limit. Its output is adjustable from approximately 0.8V to 58.8V, with a maximum duty cycle of 98%, allowing conversion from industrial and communications supply rails to lower system voltages.
Peak current-mode control simplifies external compensation and provides useful input-voltage feed-forward behavior. The integrated high-side MOSFET has a typical on-resistance of 92mΩ. Because the TPS54360 uses a nonsynchronous buck architecture, an external catch diode, inductor, capacitors, feedback network, and compensation components are required.
The switching frequency is adjustable from 100kHz to 2.5MHz through the RT/CLK pin and can also synchronize to an external clock. This range allows designers to balance conversion efficiency, passive-component size, transient performance, and electromagnetic-interference requirements.
Pulse-skipping Eco-mode improves light-load efficiency, while typical nonswitching operating current is 146μA. Pulling the enable pin low reduces shutdown current to approximately 2μA. An integrated BOOT recharge FET also supports low-dropout operation at light loads.
Integrated functions include adjustable undervoltage lockout and hysteresis, internal soft start, accurate cycle-by-cycle current limiting, output-overvoltage protection, frequency foldback, and thermal shutdown. The internal UVLO rising threshold is typically 4.3V.
The TPS54360DDAR is supplied in an 8-terminal DDA HSOIC PowerPAD package measuring approximately 4.9mm × 6.0mm. The exposed thermal pad should be connected to a suitable PCB ground and heat-spreading area. The datasheet specifies a −40°C to +150°C junction-temperature range, while the orderable-part page lists a −40°C to +125°C operating range and MSL 2 classification. The “R” suffix denotes tape-and-reel packaging.
Key Specifications
- Manufacturer: Texas Instruments
- Manufacturer Part Number: TPS54360DDAR
- Device Type: Step-Down DC-DC Converter
- Topology: Nonsynchronous Buck
- Control Method: Peak Current Mode
- Input-Voltage Range: 4.5V to 60V
- Absolute Maximum Input Voltage: 65V
- Adjustable Output Range: 0.8V to 58.8V
- Maximum Continuous Output Current: 3.5A
- Minimum Peak Inductor Current Limit: 4.5A
- Typical High-Side MOSFET On-Resistance: 92mΩ
- Switching-Frequency Range: 100kHz to 2.5MHz
- External Clock Synchronization: Supported
- Maximum Duty Cycle: 98%
- Internal Feedback Reference: 0.8V
- Feedback-Reference Accuracy: ±1%
- Typical Quiescent Current: 146μA
- Shutdown Current: Approximately 2μA
- Typical Internal UVLO Threshold: 4.3V
- Adjustable UVLO and Hysteresis: Supported
- Light-Load Operation: Pulse-Skipping Eco-mode
- Soft Start: Integrated
- Current Protection: Cycle-by-Cycle Current Limit
- Additional Protection: Overvoltage, Frequency Foldback, and Thermal Shutdown
- Package: HSOIC-8 PowerPAD
- TI Package Code: DDA
- Package Size: Approximately 4.9mm × 6.0mm
- Mounting Type: Surface Mount
- Datasheet Junction-Temperature Range: −40°C to +150°C
- Moisture Sensitivity Level: MSL 2
- Packaging: Tape and Reel
- Compliance: RoHS and REACH
- Product Status: Active
- Pin-Compatible Newer Version: TPS54360B
Typical Applications
Suitable for 12V, 24V, and 48V industrial power systems, automotive auxiliary supplies, communications equipment, industrial controllers, PLCs, motor-drive bias supplies, battery-powered systems, and wide-input DC-DC power modules.
Input transients, switching frequency, inductor saturation current, catch-diode voltage and loss, loop compensation, PowerPAD thermal design, and EMI-sensitive PCB routing should be verified in the final application.
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