61 V 2 A asynchronous step-down switching regulator with adjustable current limitation

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  • The L7987L device is a step-down monolithic switching regulator able to deliver up to 2 A DC. The output voltage adjustability ranges from 0.8 V to almost VIN. The embedded switchover feature on the VBIAS pin 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.

    主要特性

    • 2 A DC output current
    • 4.5 V to 61 V operating input voltage
    • RDS,ON = 300 mΩ typ.
    • Adjustable fSW (250 kHz - 1.5 MHz)
    • Low IQ-SHD (11 μA typ. from VIN)
    • Low IQ (1 mA typ. - VIN 24 V - VOUT 3.3 V)
    • Output voltage adjustable from 0.8 V to VIN
    • Synchronization
    • Adjustable soft-start time
    • Adjustable current limitation
    • Advanced bootstrap capacitor management for LDO operation
    • VBIAS improves 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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L7987LTR HTSSOP16 Tape And Reel
批量生产
1.0 10000 EAR99 - 查看供货情况

Distributor availability ofL7987LTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 6351 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 45000 2500 Order Now
MOUSER WORLDWIDE 3446 1 Order Now
Farnell Element14 EUROPE 1261 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

代理商库存报告日期: 2019-12-08

代理商名称

DIGIKEY

库存

6351

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1

地区

WORLDWIDE Order Now

Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

45000

Min.Order

2500

地区

AMERICA Order Now

MOUSER

库存

3446

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1261

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

5000

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-12-08

立即购买
L7987L HTSSOP16 Tube
批量生产
1.0 10000 EAR99 - 查看供货情况

Distributor availability ofL7987L

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1559 1 Order Now
ARROW EUROPE 1855 0 Order Now
ARROW AMERICA 7680 1920 Order Now
MOUSER WORLDWIDE 2183 1 Order Now
Farnell Element14 EUROPE 842 1 Order Now

代理商库存报告日期: 2019-12-08

代理商名称

DIGIKEY

库存

1559

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

1855

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

7680

Min.Order

1920

地区

AMERICA Order Now

MOUSER

库存

2183

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

842

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-12-08

立即购买

L7987LTR

封装

HTSSOP16

包装类型

Tape And Reel

单价(US$)

1.0*

Distributor availability ofL7987LTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 6351 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 45000 2500 Order Now
MOUSER WORLDWIDE 3446 1 Order Now
Farnell Element14 EUROPE 1261 1 Order Now
RUTRONIK EUROPE 5000 2500 Order Now

代理商库存报告日期: 2019-12-08

代理商名称

DIGIKEY

库存

6351

Min.Order

1

地区

WORLDWIDE Order Now

Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

45000

Min.Order

2500

地区

AMERICA Order Now

MOUSER

库存

3446

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1261

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

5000

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-12-08

供货状态

批量生产

单价(US$)

1

数量

10000

ECCN (US)

EAR99

Country of Origin

-

L7987L

封装

HTSSOP16

包装类型

Tube

单价(US$)

1.0*

Distributor availability ofL7987L

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1559 1 Order Now
ARROW EUROPE 1855 0 Order Now
ARROW AMERICA 7680 1920 Order Now
MOUSER WORLDWIDE 2183 1 Order Now
Farnell Element14 EUROPE 842 1 Order Now

代理商库存报告日期: 2019-12-08

代理商名称

DIGIKEY

库存

1559

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

1855

Min.Order

0

地区

EUROPE Order Now

ARROW

库存

7680

Min.Order

1920

地区

AMERICA Order Now

MOUSER

库存

2183

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

842

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-12-08

供货状态

批量生产

单价(US$)

1

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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    • 产品型号

      2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V) based on the L7987L

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS10340
      61 V, 2 A asynchronous step-down switching regulator with adjustable current limitation
      3.0
      2.56 MB
      PDF
      DS10340

      61 V, 2 A asynchronous step-down switching regulator with adjustable current limitation

硬件型号、CAD库及SVD

    • 描述 版本 文档大小 操作
      L7987L Pspice model 1.0
      89.79 KB
      ZIP

      L7987L Pspice model

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
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      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
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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**
L7987L
批量生产
HTSSOP16 工业 Ecopack2
L7987LTR
批量生产
HTSSOP16 工业 Ecopack2

L7987L

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987LTR

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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Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

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