Specification	TPS54478RTET

Current - Output	4 A
Frequency - Switching [Max]	2 MHz
Frequency - Switching [Min]	200 kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	16-WFQFN Exposed Pad
Supplier Device Package	16-WQFN (3x3)
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	6 V
Voltage - Input (Min) [Min]	2.95 V
Voltage - Output (Max) [Max]	4.5 V
Voltage - Output (Min/Fixed)	0.6 V

TPS54478 Series

2.95V to 6V Input, 4A Synchronous Step-Down SWIFT™ Converter with Hiccup Current Limit

Part	Regulator Topology	Supplied Contents	Board Type	Voltage - Output	Frequency - Switching	Utilized IC / Part	Voltage - Input [Min]	Voltage - Input [Max]	Outputs and Type	Outputs and Type	Main Purpose	Current - Output	Function	Mounting Type	Voltage - Input (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Package / Case	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Output (Max) [Max]	Output Configuration	Voltage - Output (Min/Fixed)	Output Type	Number of Outputs	Topology	Voltage - Input (Min) [Min]
Texas Instruments TPS54478EVM-037	Buck	Board(s)	Fully Populated	1.8 V	2 MHz	TPS54478	2.95 V	6 V	Non-Isolated	1	DC/DC Step Down	4 A
Texas Instruments TPS54478RTER												4 A	Step-Down	Surface Mount	6 V	150 °C	-40 °C	16-WQFN (3x3)	16-WFQFN Exposed Pad	2 MHz	200 kHz	4.5 V	Positive	0.6 V	Adjustable	1	Buck	2.95 V
Texas Instruments TPS54478RTET												4 A	Step-Down	Surface Mount	6 V	150 °C	-40 °C	16-WQFN (3x3)	16-WFQFN Exposed Pad	2 MHz	200 kHz	4.5 V	Positive	0.6 V	Adjustable	1	Buck	2.95 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.45
		10	$ 3.10
		25	$ 2.93
		100	$ 2.54
	Digi-Reel®	1	$ 3.45
		10	$ 3.10
		25	$ 2.93
		100	$ 2.54
	Tape & Reel (TR)	250	$ 1.69
		500	$ 1.61
LCSC	Piece	1	$ 1.64
		10	$ 1.39
		30	$ 1.23
		250	$ 1.07
		500	$ 1.00
		1000	$ 0.96
Texas Instruments	SMALL T&R	1	$ 2.60
		100	$ 2.28
		250	$ 1.60
		1000	$ 1.29

Description

General part information

TPS54478 Series

The TPS54478 device is a full featured 6-V, 4-A, synchronous step down current mode converter with two integrated MOSFETs.

The TPS54478 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.

The TPS54478 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature. Efficiency is maximized through the integrated 30-mΩ MOSFETs and 525-µA typical supply current. Using the enable pin, shutdown supply current is reduced to 2.5 µA by entering a shutdown mode.