3.3V Input, 9A Synchronous Buck Converter With Disabled Sinking During Start Up

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.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
TPS54973PWPR Texas Instruments 3.3V Input, 9A Synchronous Step-Down SWIFT™ Converter for Prebiased Outputs 28-HTSSOP -40 to 85
TPS54973PWP Texas Instruments 3.3V Input, 9A Synchronous Step-Down SWIFT™ Converter for Prebiased Outputs 28-HTSSOP -40 to 85
TPS54973PWPG4 Texas Instruments 3.3V Input, 9A Synchronous Step-Down Converter with Disabled Sinking During Start Up 28-HTSSOP -40 to 85
TPS54973PWPRG4 Texas Instruments 3.3V Input, 9A Synchronous Step-Down SWIFT™ Converter for Prebiased Outputs 28-HTSSOP -40 to 85
TPS54973 's PackagesTPS54973 's pdf datasheet
TPS54973PWP HTSSOP
TPS54973PWPG4 HTSSOP
TPS54973PWPR HTSSOP
TPS54973PWPRG4 HTSSOP




TPS54973 Pinout, Pinouts
TPS54973 pinout,Pin out
This is one package pinout of TPS54973,If you need more pinouts please download TPS54973's pdf datasheet.

TPS54973 Application circuits
TPS54973 circuits
This is one application circuit of TPS54973,If you need more circuits,please download TPS54973's pdf datasheet.


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