TPS54973 Series
3.3V Input, 9A Synchronous Step-Down Converter for Prebiased Outputs
Manufacturer: Texas Instruments
Catalog
3.3V Input, 9A Synchronous Step-Down Converter for Prebiased Outputs
Key Features
• 15-mMOSFET Switches for High Efficiency at 9-A Continuous Output Source or Sink CurrentDisabled Current Sinking During Start-Up0.9-V to 2.5-V Adjustable Output Voltage Range With 1.0% AccuracyWide PWM Frequency:Fixed 350 kHz, 550 kHz orAdjustable 280 kHz to 700 kHzSynchronizable to 700 kHzLoad Protected by Peak Current Limit and Thermal ShutdownIntegrated Solution Reduces Board Area and Component CountAPPLICATIONSLow-Voltage, High-Density Distributed Power SystemsPoint of Load Regulation for High Performance DSPs, FPGAs, ASICs and MicroprocessorsBroadband, Networking and Optical Communications InfrastructurePower PC Series ProcessorsPowerPAD and SWIFT are trademarks of Texas Instruments.15-mMOSFET Switches for High Efficiency at 9-A Continuous Output Source or Sink CurrentDisabled Current Sinking During Start-Up0.9-V to 2.5-V Adjustable Output Voltage Range With 1.0% AccuracyWide PWM Frequency:Fixed 350 kHz, 550 kHz orAdjustable 280 kHz to 700 kHzSynchronizable to 700 kHzLoad Protected by Peak Current Limit and Thermal ShutdownIntegrated Solution Reduces Board Area and Component CountAPPLICATIONSLow-Voltage, High-Density Distributed Power SystemsPoint of Load Regulation for High Performance DSPs, FPGAs, ASICs and MicroprocessorsBroadband, Networking and Optical Communications InfrastructurePower PC Series ProcessorsPowerPAD and SWIFT are trademarks of Texas Instruments.
Description
AI
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.
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.