Specification	TPS54340DDA

Current - Output	3.5 A
Frequency - Switching [Max]	2.5 MHz
Frequency - Switching [Min]	100 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	8-PowerSOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SO PowerPad
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Max) [Max]	42 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max) [Max]	41.1 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	$ 5.49
		10	$ 4.93
		75	$ 4.67
		150	$ 4.04
		300	$ 3.84
		525	$ 3.44
		1050	$ 2.90
		2550	$ 2.76
Texas Instruments	TUBE	1	$ 4.15
		100	$ 3.63
		250	$ 2.55
		1000	$ 2.05

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.