Specification	TPS54340QDDAQ1

Current - Output	3.5 A
Frequency - Switching [Max]	2.5 MHz
Frequency - Switching [Min]	100 kHz
Function	Step-Down
Grade	Automotive
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	8-PowerSOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Qualification	AEC-Q100
Supplier Device Package	8-SO PowerPad
Synchronous Rectifier	False
Topology	Split Rail, Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	41 V
Voltage - Output (Min/Fixed)	0.8 V

TPS54340B-Q1 Series

Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™

Part	Number of Outputs	Output Configuration	Package / Case [y]	Package / Case [x]	Package / Case	Frequency - Switching [Max]	Frequency - Switching [Min]	Qualification	Mounting Type	Voltage - Output (Max) [Max]	Voltage - Input (Max) [Max]	Function	Grade	Output Type	Topology	Current - Output	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Frequency - Switching	Board Type	Supplied Contents	Main Purpose	Regulator Topology	Outputs and Type	Outputs and Type	Utilized IC / Part	Voltage - Input [Min]	Voltage - Input [Max]	Voltage - Output
Texas Instruments TPS54340QDDAQ1	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz	AEC-Q100	Surface Mount	41 V	42 V	Step-Down	Automotive	Adjustable	Buck Split Rail	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad
Texas Instruments TPS54340-Q1EVM-593																3.5 A						400 kHz	Fully Populated	Board(s)	DC/DC Step Down	Buck	Non-Isolated	1	TPS54340-Q1	7 V	42 V	5 V
Texas Instruments TPS54340BQDDARQ1	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz	AEC-Q100	Surface Mount	41.1 V	42 V	Step-Down	Automotive	Adjustable	Buck	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad
Texas Instruments TPS54340BDDAR	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz		Surface Mount	41.1 V	42 V	Step-Down		Adjustable	Buck	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad
Texas Instruments TPS54340EVM-182																3.5 A						600 kHz	Fully Populated	Board(s)	DC/DC Step Down	Buck	Non-Isolated	1	TPS54340	6 V	42 V	3.3 V
Texas Instruments TPS54340DDAR	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz		Surface Mount	41.1 V	42 V	Step-Down		Adjustable	Buck	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad
Texas Instruments TPS54340BDDA	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz		Surface Mount	41.1 V	42 V	Step-Down		Adjustable	Buck	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad
Texas Instruments TPS54340DDA	1	Positive	3.9 mm	0.154 in	8-PowerSOIC	2.5 MHz	100 kHz		Surface Mount	41.1 V	42 V	Step-Down		Adjustable	Buck	3.5 A	0.8 V	4.5 V	150 °C	-40 °C	8-SO PowerPad

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	$ 6.19
		10	$ 5.56
		75	$ 5.26
		150	$ 4.56
		300	$ 4.32
		525	$ 3.88
		1050	$ 3.27
		2550	$ 3.11
Texas Instruments	TUBE	1	$ 5.26
		100	$ 4.61
		250	$ 3.23
		1000	$ 2.60

Description

General part information

TPS54340B-Q1 Series

The TPS54340-Q1 device is a 42-V, 3.5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 45 V per ISO 7637. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 146 µA. Shutdown supply current is reduced to 1 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.

A wide adjustable frequency range allows for optimization of either efficiency or external component size. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

Documents

Technical documentation and resources

TPS54340-Q1 4.5-V to 42-V Input, 3.5-A, Step-Down DC-DC Converter With Eco-Mode™ datasheet (Rev. A)

Data sheet