L6981C33DR

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STMicroelectronics

38 V, 1.5 A SYNCHRONOUS STEP-DOWN CONVERTER WITH 20 ΜA QUIESCENT CURRENT

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L6981C33DR

Active

STMicroelectronics

38 V, 1.5 A SYNCHRONOUS STEP-DOWN CONVERTER WITH 20 ΜA QUIESCENT CURRENT

Deep-Dive with AI

Documents TN1224 +6

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	L6981C33DR

Current - Output	1.5 A
Frequency - Switching	400 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	1.81 mOhm
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SO
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	38 V
Voltage - Input (Min) [Min]	3.5 V
Voltage - Output (Min/Fixed)	3.3 V

L6981 Series

38 V, 1.5 A synchronous step-down converter with 20 µA quiescent current

Part	Package / Case	Package / Case [y]	Package / Case [x]	Supplier Device Package	Function	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output	Mounting Type	Output Configuration	Topology	Voltage - Input (Max) [Max]	Voltage - Output (Min/Fixed)	Number of Outputs	Output Type	Voltage - Input (Min) [Min]	Frequency - Switching
STMicroelectronics L6981C33DR	8-SOIC	3.9 mm	0.154 in	8-SO	Step-Down	150 °C	-40 °C	1.5 A	Surface Mount	Positive	Buck	38 V	3.3 V	1	1.81 mOhm	3.5 V	400 kHz
STMicroelectronics L6981C50DR	8-SOIC	3.9 mm	0.154 in	8-SO	Step-Down	150 °C	-40 °C	1.5 A	Surface Mount	Positive	Buck	38 V	5 V	1	1.81 mOhm	3.5 V	400 kHz
STMicroelectronics L6981N50DR	8-SOIC	3.9 mm	0.154 in	8-SO	Step-Down	150 °C	-40 °C	1.5 A	Surface Mount	Positive	Buck	38 V	5 V	1	1.81 mOhm	3.5 V	400 kHz

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	$ 2.87
		10	$ 2.58
		25	$ 2.44
		100	$ 2.11
		250	$ 2.01
		500	$ 1.80
		1000	$ 1.52
	Digi-Reel®	1	$ 2.87
		10	$ 2.58
		25	$ 2.44
		100	$ 2.11
		250	$ 2.01
		500	$ 1.80
		1000	$ 1.52
	Tape & Reel (TR)	2500	$ 1.44
		5000	$ 1.39
Newark	Each (Supplied on Cut Tape)	1	$ 3.45
		10	$ 2.57
		25	$ 2.51
		50	$ 2.44
		100	$ 2.38
		250	$ 2.28
		500	$ 2.23
		1000	$ 2.18

Description

General part information

L6981 Series

The L6981 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 1.5 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6981 is based on a peak current mode architecture and is packaged in an SO8 with internal compensation, thus minimizing design complexity and size.

The L6981 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple so the device is suitable for battery-powered applications.

LNM makes the switching frequency constant and minimizes the output voltage ripple for light-load operations, meeting the specification for low noise sensitive applications.