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

下载数据手册

Order from our eStore and our distributors

立即购买
概述
工具与软件
资源
解决方案
质量与可靠性
Sales Briefcase
eDesignSuite
开始
样片和购买
Partner products
  • 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.

    主要特性

    • 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

产品型号
封装
包装类型
供货状态
预算价格(US$)
数量
ECCN (US)
Country of Origin
从分销商订购
从ST订购
L7987TR HTSSOP16 Tape And Reel
Active
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 2470 1 Order Now
ARROW EUROPE 23103 0 Order Now
MOUSER WORLDWIDE 1800 1 Order Now

代理商库存报告日期: 2019-07-22

代理商名称

DIGIKEY

库存

2470

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

23103

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1800

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-07-22

立即购买
L7987 HTSSOP16 Tube
Active
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 6066 1 Order Now
FUTURE WORLDWIDE 1840 1 Order Now
MOUSER WORLDWIDE 9795 1 Order Now
Farnell Element14 EUROPE 353 1 Order Now

代理商库存报告日期: 2019-07-22

代理商名称

DIGIKEY

库存

6066

Min.Order

1

地区

WORLDWIDE Order Now

FUTURE

库存

1840

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

9795

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

353

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-07-22

立即购买

L7987TR

封装

HTSSOP16

包装类型

Tape And Reel

Unit Price (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 2470 1 Order Now
ARROW EUROPE 23103 0 Order Now
MOUSER WORLDWIDE 1800 1 Order Now

代理商库存报告日期: 2019-07-22

代理商名称

DIGIKEY

库存

2470

Min.Order

1

地区

WORLDWIDE Order Now

ARROW

库存

23103

Min.Order

0

地区

EUROPE Order Now

MOUSER

库存

1800

Min.Order

1

地区

WORLDWIDE Order Now

代理商库存报告日期: 2019-07-22

供货状态

Active

Unit Price (US$)

1.25

数量

10000

ECCN (US)

EAR99

Country of Origin

-

L7987

封装

HTSSOP16

包装类型

Tube

Unit Price (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 6066 1 Order Now
FUTURE WORLDWIDE 1840 1 Order Now
MOUSER WORLDWIDE 9795 1 Order Now
Farnell Element14 EUROPE 353 1 Order Now

代理商库存报告日期: 2019-07-22

代理商名称

DIGIKEY

库存

6066

Min.Order

1

地区

WORLDWIDE Order Now

FUTURE

库存

1840

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

9795

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

353

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-07-22

供货状态

Active

Unit Price (US$)

1.25

数量

10000

ECCN (US)

EAR99

Country of Origin

-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

适合您的资源

相关应用

LED照明和控制

家居、建筑和城市自动化

工厂自动化

智能农业

电源和变换器

能源生产和分配

评估工具

    • 产品型号

      3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      DS10053
      61 V 3 A asynchronous step-down switching regulator with adjustable current limitation
      3.0
      2.34 MB
      PDF
      DS10053

      61 V 3 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
      L7987 Pspice model 1.0
      241.29 KB
      ZIP

      L7987 Pspice model

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      DC-DC converters
      557.92 KB
      PDF

      DC-DC converters

    • 描述 版本 文档大小 操作
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

产品型号 供货状态 封装 等级规格 符合RoHS级别 材料声明**
L7987
Active
HTSSOP16 工业 Ecopack2
L7987TR
Active
HTSSOP16 工业 Ecopack2

L7987

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987TR

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

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.

eDesignSuite

转换器

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.