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.

• 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.

• Vin (Min) (V)
• 3
• Vin (Max) (V)
• 4
• Vout (Min) (V)
• 0.9
• Vout (Max) (V)
• 2.5
• Iout (Max) (A)
• 9
• Iq (Typ) (uA)
• 11000
• Switching frequency (Min) (kHz)
• 280
• Switching frequency (Max) (kHz)
• 700
• Features
• Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification
• Rating
• Catalog
• Regulated outputs (#)
• 1
• Control mode
• Voltage Mode
• Duty cycle (Max) (%)
• 90

TPS54973的完整型号有：TPS54973PWP、TPS54973PWPR，以下是这些产品的关键参数及官网采购报价：

TPS54973PWP，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS54973PWP的批量USD价格：2.904（1000+）

TPS54973PWPR，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网TPS54973PWPR的批量USD价格：2.42（1000+）

TPS54973 Unencrypted Transient PSpice Model Package (Rev. A)

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