TPS54073 Datasheet | Texas Instruments

FEATURES - 2 8-mΩ MOSFET Switches for High Efficiency at 14.5-A Peak Output Current - Separate Low-Voltage Power Bus - Disabled Current Sinking During Start-Up - Adjustable Output Voltage Down to 0.9 V - Wide PWM Frequency: Fixed 350 k Hz, 550 k Hz or Adjustable 280 k Hz to 700 k Hz - Synchronizable to 700 k Hz - Load Protected by Peak Current Limit and Thermal Shutdown - Integrated Solution Reduces Board Area and Total Cost APPLICATIONS - Low-Voltage, High-Density Distributed Power Systems - Point of Load Regulation for High Performance DSPs, FPGAs, ASICs, and Microprocessors - Broadband, Networking, and Optical munications Infrastructure - Power PC Series Processors TYPICAL APPLICATION - - - Voltage Input 1 Voltage Input 2 PVIN BOOT PGND VBIAS VSENSE AGND P DESCRIPTION As a member of the SWIFT™family of dc/dc regulators, the TPS54073 low-input voltage high-output current synchronous buck PWM converter integrates all required active ponents. 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 ponents; 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 TPS54073 is designed to only source current during start-up. The TPS54073 is available in a thermally enhanced 28-pin TSSOP (PWP) Power PAD™ 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 START-UP WAVEFORM WITH 3 PRECHARGE DIODES Output RL = 1.5 W VI/O = 3.3 V 500 m V/div V(core) = 1.5 V - Optional t -...