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Datasheet
TPS54340BDDAR – Buck Switching Regulator IC 3.5A SOIC-8
The TPS54340BDDAR from Texas Instruments is a highly efficient 3.5A, 42V synchronous step-down (buck) regulator featuring an integrated high-side MOSFET. This compact, robust regulator is designed for industrial, communication, and automotive power supply applications that demand reliable performance, wide input range, and excellent efficiency. Operating from an input voltage range up to 42V, the TPS54340B provides stable output regulation using current-mode control, allowing for simple external compensation and flexible component selection. The device’s pulse skip mode minimizes switching losses at light loads, reducing no-load current to 146 uA, while the shutdown current drops to as low as 2 uA, making it ideal for energy-sensitive applications.
The TPS54340B includes an internally controlled soft-start ramp to eliminate overshoot during power-up and supports a wide adjustable switching frequency, enabling designers to balance between efficiency and component size. Built-in safety features such as frequency foldback, cycle-by-cycle overcurrent protection, undervoltage lockout (UVLO), and thermal shutdown ensure reliable operation under overload or fault conditions.
Key Features:
- Wide Input Voltage Range: Operates from 4.3V to 42V, suitable for industrial and automotive systems.
- High Output Current: Delivers up to 3.5A continuous current with integrated MOSFET.
- Current Mode Control: Simplifies design with flexible external component selection and stable operation.
- Low Power Consumption: 146 uA no-load current and 2 uA shutdown current for power-efficient operation.
- Soft-Start Control: Internally managed start-up ramp prevents voltage overshoot.
- Adjustable Switching Frequency: Optimizable for performance or size, supporting efficient system design.
- Comprehensive Protection: Includes UVLO, thermal shutdown, frequency foldback, and cycle-by-cycle OCP.
- Rugged PowerPAD SOIC-8 Package: Provides excellent thermal performance for high-current applications.
- Ideal for: Industrial automation, communication modules, automotive electronics, and distributed power systems.
