Specification	TPS54973PWP

Current - Output	9 A
Frequency - Switching [Max]	550 kHz
Frequency - Switching [Min]	350 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	28-PowerTSSOP
Package / Case [custom]	4.4 mm
Package / Case [custom]	0.173 "
Supplier Device Package	28-HTSSOP
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max)	4 V
Voltage - Input (Min) [Min]	3 V
Voltage - Output (Min/Fixed)	0.891 V

TPS54973 Series

3.3V Input, 9A Synchronous Step-Down Converter for Prebiased Outputs

Part	Current - Output	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Number of Outputs	Voltage - Input (Max)	Package / Case [custom]	Package / Case	Package / Case [custom]	Synchronous Rectifier	Supplier Device Package	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Output Type	Function	Mounting Type	Output Configuration
Texas Instruments TPS54973PWP	9 A	85 °C	-40 °C	Buck	1	4 V	4.4 mm	28-PowerTSSOP	0.173 "		28-HTSSOP	550 kHz	350 kHz	3 V	0.891 V	Adjustable	Step-Down	Surface Mount	Positive
Texas Instruments TPS54973PWPR	9 A	85 °C	-40 °C	Buck	1	4 V	4.4 mm	28-PowerTSSOP	0.173 "		28-HTSSOP	550 kHz	350 kHz	3 V	0.891 V	Adjustable	Step-Down	Surface Mount	Positive

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	200	$ 5.99
Texas Instruments	TUBE	1	$ 6.75
		100	$ 5.50
		250	$ 4.32
		1000	$ 3.67

Description

General part information

TPS54973 Series

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.

Documents

Technical documentation and resources

3-V to 4-V Input 9-A Output Synchronous Buck Switcher datasheet (Rev. A)

Data sheet