61 V 3 A asynchronous step-down switching regulator with adjustable current limitation

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  • The L7987 device is a step-down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to VIN. The wide input voltage range and the 100% duty cycle capability meet the fail safe specifications for industrial systems. The embedded switchover feature on the VBIASpin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.

    Key Features

    • 3 A DC output current
    • 4.5 V to 61 V operating input voltage
    • RDS,ON= 250 mΩ typ.
    • Adjustable fSW(250 kHz - 1.5 MHz)
    • Low IQ-SHD (11 μA typ. from VIN)
    • Low IQ (1 mA typ. - VIN24 V - VOUT3.3 V)
    • Output voltage adjustable from 0.8 V to VIN
    • Synchronization
    • Adjustable soft-start time
    • Adjustable current limitation
    • Low dropout operation (12 μs max.)
    • VBIASimproves efficiency at light load
    • PGOOD open collector output
    • Output voltage sequencing
    • Digital frequency foldback in short-circuit
    • Peak current foldback in short-circuit
    • Auto-recovery thermal shutdown

样片和购买

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L7987TR HTSSOP16 Tape And Reel
批量生产
1.25 10000 EAR99 - 查看供货情况

Distributor availability ofL7987TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2460 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 1500 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

代理商库存报告日期: 2019-11-11

代理商名称

DIGIKEY

库存

2460

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1

地区

WORLDWIDE Order Now

ARROW

库存

5000

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1500

Min.Order

1

地区

WORLDWIDE Order Now

RUTRONIK

库存

2500

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-11

立即购买
L7987 HTSSOP16 Tube
批量生产
1.25 10000 EAR99 - 查看供货情况

Distributor availability ofL7987

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 5864 1 Order Now
FUTURE WORLDWIDE 2246 1 Order Now
Newark Element14 AMERICA 26 0 Order Now
MOUSER WORLDWIDE 1109 1 Order Now
Farnell Element14 EUROPE 212 1 Order Now

代理商库存报告日期: 2019-11-11

代理商名称

DIGIKEY

库存

5864

Min.Order

1

地区

WORLDWIDE Order Now

FUTURE

库存

2246

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

26

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1109

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

212

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-11

立即购买

L7987TR

封装

HTSSOP16

包装类型

Tape And Reel

单价(US$)

1.25*

Distributor availability ofL7987TR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 2460 1 Order Now
ARROW EUROPE 5000 0 Order Now
MOUSER WORLDWIDE 1500 1 Order Now
RUTRONIK EUROPE 2500 2500 Order Now

代理商库存报告日期: 2019-11-11

代理商名称

DIGIKEY

库存

2460

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

5000

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1500

Min.Order

1

地区

WORLDWIDE Order Now

RUTRONIK

库存

2500

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-11

供货状态

批量生产

单价(US$)

1.25

数量

10000

ECCN (US)

EAR99

Country of Origin

-

L7987

封装

HTSSOP16

包装类型

Tube

单价(US$)

1.25*

Distributor availability ofL7987

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 5864 1 Order Now
FUTURE WORLDWIDE 2246 1 Order Now
Newark Element14 AMERICA 26 0 Order Now
MOUSER WORLDWIDE 1109 1 Order Now
Farnell Element14 EUROPE 212 1 Order Now

代理商库存报告日期: 2019-11-11

代理商名称

DIGIKEY

库存

5864

Min.Order

1

地区

WORLDWIDE Order Now

FUTURE

库存

2246

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

26

Min.Order

0

地区

AMERICA Order Now

MOUSER

库存

1109

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

212

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-11-11

供货状态

批量生产

单价(US$)

1.25

数量

10000

ECCN (US)

EAR99

Country of Origin

-

(*) 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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技术文档

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      DS10053
      61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
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      61 V 3 A asynchronous step-down switching regulator with adjustable current limitation

硬件型号、CAD库及SVD

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      L7987 Pspice model 1.0
      241.29 KB
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      L7987 Pspice model

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产品型号 供货状态 封装 等级规格 符合RoHS级别 Material Declaration**
L7987
批量生产
HTSSOP16 工业 Ecopack2
L7987TR
批量生产
HTSSOP16 工业 Ecopack2

L7987

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987TR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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