TPS54873PWPR

The TPS54873 low-input voltage high-output current synchronous buck PWM converter integrates all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier that enables maximum performance and flexibility in choosing the output filter L and C components; an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4 V; an internally or externally set slow-start circuit to limit inrush currents; and a power good output useful for processor/logic reset, fault signaling, and supply sequencing. For reliable power up in output precharge applications, the TPS54873 is designed to only source current during startup. The TPS54873 is available in a thermally enhanced 28-pin TSSOP (PWP) PowerPAD package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Applications

• Low-Voltage, High-Density Distributed Power Systems
• Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
• Broadband, Networking and Optical Communications Infrastructure
• Power PC Series Processors

Key features

• 30-mΩ, 12-A Peak MOSFET Switches for High Efficiency at 8-A Continuous Output Source or Sink Current Disabled Current Sinking During Start-Up
• 0.9-V to 3.3-V Adjustable Output Voltage Range With ±1.0% Accuracy
• Wide PWM Frequency: Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz Synchronizable to 700 kHz
• Load Protected by Peak Current Limit and Thermal Shutdown Integrated Solution Reduces Board Area and Component Count