Specification	TPS54873PWP

Current - Output	8 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) [Max]	6 V
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Max) [Max]	3.3 V
Voltage - Output (Min/Fixed)	0.9 V

TPS54873 Series

4.5 to 5.5V Input, 8A Synchronous Step-Down SWIFT™ Converter for Prebiased Outputs

Part	Voltage - Output (Max) [Max]	Voltage - Output (Min/Fixed)	Topology	Package / Case [custom]	Package / Case	Package / Case [custom]	Frequency - Switching [Max]	Frequency - Switching [Min]	Current - Output	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Function	Supplier Device Package	Output Configuration	Synchronous Rectifier	Output Type
Texas Instruments TPS54873PWP	3.3 V	0.9 V	Buck	4.4 mm	28-PowerTSSOP	0.173 "	550 kHz	350 kHz	8 A	1	85 °C	-40 °C	Surface Mount	4 V	6 V	Step-Down	28-HTSSOP	Positive		Adjustable

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 7.69
		10	$ 6.95
		50	$ 6.63
Texas Instruments	TUBE	1	$ 6.48
		100	$ 5.28
		250	$ 4.15
		1000	$ 3.52

Description

General part information

TPS54873 Series

As a member of the SWIFT™ family of dc/dc regulators, family of dc/dc regulators,the TPS54873 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 under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4 V; an internally or externally set slow-start circuit to limit inrush 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 TPS54873 is designed to only source current during startup.

The TPS54873 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

4-V to 6-V Input, 8-A Output Synchronous Buck Switcher datasheet (Rev. A)

Data sheet