TPS54973数据手册集成电路（IC）的DCDC开关稳压器规格书PDF

描述 Description

As a member of the SWIFT™ family of dc/dc regulators, the TPS54973 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 undervoltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally or externally set slow-start circuit to limit in-rush 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 TPS54973 is designed to only source current during startup.

The TPS54973 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.

特性 Features

• 15-m MOSFET Switches for High Efficiency at 9-A Continuous Output Source or Sink Current
• Disabled Current Sinking During Start-Up
• 0.9-V to 2.5-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
• 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

PowerPAD and SWIFT are trademarks of Texas Instruments.