L6981 - 38 V, 1.5 A synchronous step-down converter with 20 µA quiescent current - 意法半导体STMicroelectronics

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描述

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.

The EN pin provides enable/disable functionality. The typical shutdown current is 2 µA when disabled. As soon as the EN pin is pulled up the device is enabled and the internal 1.3 ms soft-start takes place. Pulse-by-pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal run-away.

所有功能
3.5 V to 38 V operating input voltage

Output voltage from 0.85 V to V_IN

1.5 A DC output current

Internal compensation network

Two different versions: LCM for high efficiency at light-loads and LNM for noise sensitive applications

2 μA shutdown current

Internal soft-start
Enable

Overvoltage protection

Output voltage sequencing

Thermal protection

Synchronization to external clock for LNM devices

SO8 package
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Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	STEVAL-QUADV01	批量生产	基于降压稳压器L6981、L7983、ST1PS03和ST730 LDO的电源管理评估板	电源与转换器	ST	STEVAL-QUADV01 描述: 基于降压稳压器L6981、L7983、ST1PS03和ST730 LDO的电源管理评估板

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	资源标题	版本	更新时间

产品规格 (1)

	资源标题	版本	更新时间
PDF	DS13554 38 V, 1.5 A synchronous step-down converter with 20 μA quiescent current	3.0	21 Dec 2022	21 Dec 2022 DS13554 38 V, 1.5 A synchronous step-down converter with 20 μA quiescent current 3.0

技术文档 (2)

	资源标题	版本	更新时间
PDF	TN1224 Mounting instructions for SMD (surface mounting device) packages	2.4	11 Jul 2023	11 Jul 2023 TN1224 Mounting instructions for SMD (surface mounting device) packages 2.4
PDF	ST Coilcraft L3751	1.0	02 May 2023	02 May 2023 ST Coilcraft L3751 1.0

简报 (1)

	资源标题	版本	更新时间
PDF	Discover ST’s portfolio for signal conditioning, interface, and power management in wearables	2.2	02 Aug 2023	02 Aug 2023 Discover ST’s portfolio for signal conditioning, interface, and power management in wearables 2.2

宣传册 (2)

	资源标题	版本	更新时间
PDF	A6983I and A6986I: isolated DC-DC converters ICs	2.0	05 Mar 2025	05 Mar 2025 A6983I and A6986I: isolated DC-DC converters ICs 2.0
PDF	L6981, L6982, L6983 - 面向工业应用的同步降压转换器	1.0	17 Jul 2024	17 Jul 2024 L6981, L6982, L6983 - 面向工业应用的同步降压转换器 1.0

手册 (1)

	资源标题	版本	更新时间
PDF	DC-DC Switching Converters Reference Guide	6.0	30 Jul 2024	30 Jul 2024 DC-DC Switching Converters Reference Guide 6.0

EDA符号、封装和3D模型

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SIMPLIS models (1)

	资源标题	版本	更新时间
ZIP	L6981-SIMPLIS-examples-schematics	2023.07	25 Jan 2024	25 Jan 2024 L6981-SIMPLIS-examples-schematics 2023.07

质量与可靠性

产品型号	Marketing Status	包	等级规格	符合RoHS级别	材料声明**
L6981C33DR	批量生产	SO-8	工业	Ecopack2
L6981C50DR	批量生产	SO-8	工业	Ecopack2
L6981CDR	批量生产	SO-8	工业	Ecopack2	PDF XML
L6981N33DR	批量生产	SO-8	工业	Ecopack2
L6981N50DR	批量生产	SO-8	工业	Ecopack2
L6981NDR	批量生产	SO-8	工业	Ecopack2	PDF XML

L6981C33DR

Package:

SO-8

Material Declaration**:

L6981C50DR

Package:

SO-8

Material Declaration**:

L6981CDR

Package:

SO-8

Material Declaration**:

L6981N33DR

Package:

SO-8

Material Declaration**:

L6981N50DR

Package:

SO-8

Material Declaration**:

L6981NDR

Package:

SO-8

Material Declaration**:

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系销售支持。

样片和购买

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0.94 / 10k

Available at 5 distributors

经销商的可用性 L6981C50DR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	637	1	Buy from Distributor
ANGLIA Live	EUROPE	2500	1	Buy from Distributor
MOUSER	WORLDWIDE	528	1	Buy from Distributor
DIGIKEY	WORLDWIDE	4744	1	Buy from Distributor
Newark Element14	AMERICA	512	0	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

0.94 / 10k

Available at 4 distributors

经销商的可用性 L6981N50DR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	745	1	Buy from Distributor
ANGLIA Live	EUROPE	2500	1	Buy from Distributor
MOUSER	WORLDWIDE	2450	1	Buy from Distributor
DIGIKEY	WORLDWIDE	3890	1	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

0.94 / 10k

Available at 4 distributors

经销商的可用性 L6981N33DR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	101	1	Buy from Distributor
ANGLIA Live	EUROPE	2500	1	Buy from Distributor
MOUSER	WORLDWIDE	1135	1	Buy from Distributor
DIGIKEY	WORLDWIDE	3501	1	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

0.94 / 10k

Available at 7 distributors

经销商的可用性 L6981CDR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	2643	1	Buy from Distributor
ANGLIA Live	EUROPE	3001	1	Buy from Distributor
MOUSER	WORLDWIDE	9392	1	Buy from Distributor
AVNET	AMERICA	15000	0	Buy from Distributor
DIGIKEY	WORLDWIDE	736	1	Buy from Distributor
Newark Element14	AMERICA	151	0	Buy from Distributor
YOSUN	ASIA/PACIFIC	20	1	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

0.94 / 10k

Available at 6 distributors

经销商的可用性 L6981NDR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	175	1	Buy from Distributor
ANGLIA Live	EUROPE	2500	1	Buy from Distributor
MOUSER	WORLDWIDE	3455	1	Buy from Distributor
DIGIKEY	WORLDWIDE	3191	1	Buy from Distributor
Newark Element14	AMERICA	297	0	Buy from Distributor
YOSUN	ASIA/PACIFIC	20	1	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

0.94 / 10k

Available at 5 distributors

经销商的可用性 L6981C33DR

代理商名称	地区	库存	最小订购量	第三方链接
Farnell Element14	EUROPE	36	1	Buy from Distributor
ANGLIA Live	EUROPE	2500	1	Buy from Distributor
MOUSER	WORLDWIDE	1686	1	Buy from Distributor
FUTURE	WORLDWIDE	200	0	Buy from Distributor
DIGIKEY	WORLDWIDE	1125	1	Buy from Distributor

代理商库存报告日期: 4/2/2025

SO-8

Tape and Reel

CHINA

EAR99

NEC

Buy from Distributor

L6981C50DR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 5 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

L6981N50DR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 4 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

L6981N33DR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 4 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

L6981CDR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 7 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

L6981NDR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 6 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

L6981C33DR 批量生产

Budgetary Price (US$)*/Qty:

0.94 / 10k

Available at 5 distributors

Buy Direct at ST

Add Free Sample

包:

SO-8

包装类型:

Tape and Reel

Country of Origin:

CHINA

ECCN (US):

EAR99

ECCN (EU):

NEC

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(*) 建议转售单价（美元）仅用于预算用途。如需以当地货币计价的报价，请联系您当地的 ST销售办事处或我们的经销商。

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