Integrated Circuits (ICs)

A6983NQTR

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STMicroelectronics

SWITCHING VOLTAGE REGULATORS AUTOMOTIVE-GRADE 38V 3 A SYNCHRONOUS STEP-DOWN CONVERTER 25 UA QUIESCENT CURRENT

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DocumentsA6983NQTR Datasheet (PDF)+5

Integrated Circuits (ICs)

A6983NQTR

Active

STMicroelectronics

SWITCHING VOLTAGE REGULATORS AUTOMOTIVE-GRADE 38V 3 A SYNCHRONOUS STEP-DOWN CONVERTER 25 UA QUIESCENT CURRENT

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DocumentsA6983NQTR Datasheet (PDF)+5

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Technical Specifications

Parameters and characteristics for this part

Specification	A6983NQTR

Current - Output	3 A
Frequency - Switching (Max)	2.3 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
Package Length	3 mm
Package Name	16-QFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	38 V
Voltage - Input (Min)	3.5 V
Voltage - Output (Max)	38 V
Voltage - Output (Min/Fixed)	0.85 V

A6983 Series

Automotive-grade 38 V, 3 A synchronous step-down converter with 25 µA quiescent current

Part	Operating Temperature (Min)	Operating Temperature (Max)	Synchronous Rectifier	Package Width	Package Name	Package Length	Voltage - Input (Min)	Current - Output	Voltage - Output (Max)	Voltage - Output (Min/Fixed)	Voltage - Input (Max)	Number of Outputs	Mounting Type	Package / Case	Frequency - Switching (Max)	Frequency - Switching (Min)	Output Type	Function	Topology	Output Configuration	Qualification	Grade	Total Output Count	Non-Isolated Output Count	Supplied Contents	Board Type	Main Purpose	Regulator Topology	Utilized IC / Part	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Contents
STMicroelectronics A6983CQTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A	38 V	0.85 V	38 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Adjustable	Step-Down	Buck	Positive
STMicroelectronics A6983N50QTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A		5 V	36 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Fixed	Step-Down	Buck	Positive	AEC-Q100	Automotive
STMicroelectronics A6983NQTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A	38 V	0.85 V	38 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Adjustable	Step-Down	Buck	Positive
STMicroelectronics A6983C50QTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A		5 V	36 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Fixed	Step-Down	Buck	Positive	AEC-Q100	Automotive
STMicroelectronics A6983IQTR	-40 °C	150 °C	No	3 mm	16-QFN	3 mm	3.5 V	4.5 A	38 V	0.85 V	38 V	1	Surface Mount	16-WFQFN Exposed Pad	1 MHz	200 kHz	Adjustable	Step-Down	Buck	Isolation Capable Positive
STMicroelectronics STEVAL-A6983CV1								3 A									Non-Isolated						1	1 count	Board(s)	Fully Populated	DC/DC Step Down	Buck	A6983C	3.5 V	38 V	Board
STMicroelectronics A6983C33QTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A		3.3 V	36 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Fixed	Step-Down	Buck	Positive	AEC-Q100	Automotive
STMicroelectronics A6983N33QTR	-40 °C	150 °C	Yes	3 mm	16-QFN	3 mm	3.5 V	3 A		3.3 V	36 V	1	Surface Mount	16-WFQFN Exposed Pad	2.3 MHz	200 kHz	Fixed	Step-Down	Buck	Positive	AEC-Q100	Automotive

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	N/A	1882	$ 3.29	1m+
Mouser	N/A	1	$ 3.54	1m+
		10	$ 2.67
		25	$ 2.45
		100	$ 2.21
		250	$ 2.10
		500	$ 2.03
		1000	$ 1.97
		3000	$ 1.74
Newark	Each (Supplied on Cut Tape)	1	$ 3.54	1m+
		10	$ 2.67
		25	$ 2.45
		50	$ 2.33
		100	$ 2.21
		250	$ 2.09
		500	$ 2.02
		1000	$ 1.96

CAD

3D models and CAD resources for this part

Description

General part information

A6983 Series

The A6983I is a device specifically designed for isolated buck topology. The primary output voltage can be accurately adjusted, whereas the isolated secondary output is derived by using a given transformer ratio. No optocoupler is required. The primary sink capability up to -4.5 A (even during soft-start) allows a proper energy transfer to the secondary side, as well as enables a tracked soft-start of the secondary output. The control loop is based on a peak current mode architecture and the device operates in forced PWM. The 390 ns blanking time filters oscillations, generated by the transformer leakage inductance, makes the solution more robust.

Both the compact QFN-16 (3x3 mm) package and the internal compensation of the A6983I help minimizing the design complexity and size.

The switching frequency can be programmed in the 200 kHz to 1 MHz range with an optional spread spectrum for improved EMC.

A6983NQTR

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A6983NQTR

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Technical Specifications

A6983 Series

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CAD

Description

A6983 Series

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A6983NQTR Datasheet (PDF)

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A6983 Series