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
Active
1.0 1000 EAR99 - Check Availability

Distributor availability ofL7987LTR

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 7749 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 9521 1 Order Now
Farnell Element14 EUROPE 716 1 Order Now
RUTRONIK EUROPE 200 2500 Order Now

代理商库存报告日期: 2019-06-17

代理商名称

DIGIKEY

库存

7749

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1

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WORLDWIDE Order Now

FUTURE

库存

2500

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2500

地区

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ARROW

库存

7500

Min.Order

0

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Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

2500

Min.Order

2500

地区

AMERICA Order Now

MOUSER

库存

9521

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

716

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

200

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-06-17

Buy now
L7987L HTSSOP16 Tube
Active
1.0 1000 EAR99 - Check Availability

Distributor availability ofL7987L

代理商名称
地区 库存 最小订购量 Third party link
DIGIKEY WORLDWIDE 1936 1 Order Now
MOUSER WORLDWIDE 844 1 Order Now
Farnell Element14 EUROPE 1415 1 Order Now

代理商库存报告日期: 2019-06-17

代理商名称

DIGIKEY

库存

1936

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

844

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1415

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-06-17

Buy now

L7987LTR

Package

HTSSOP16

Packing Type

Tape And Reel

Unit Price (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 7749 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 7500 0 Order Now
Newark Element14 AMERICA 625 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 9521 1 Order Now
Farnell Element14 EUROPE 716 1 Order Now
RUTRONIK EUROPE 200 2500 Order Now

代理商库存报告日期: 2019-06-17

代理商名称

DIGIKEY

库存

7749

Min.Order

1

地区

WORLDWIDE Order Now

FUTURE

库存

2500

Min.Order

2500

地区

WORLDWIDE Order Now

ARROW

库存

7500

Min.Order

0

地区

EUROPE Order Now

Newark Element14

库存

625

Min.Order

0

地区

AMERICA Order Now

ARROW

库存

2500

Min.Order

2500

地区

AMERICA Order Now

MOUSER

库存

9521

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

716

Min.Order

1

地区

EUROPE Order Now

RUTRONIK

库存

200

Min.Order

2500

地区

EUROPE Order Now

代理商库存报告日期: 2019-06-17

Marketing Status

Active

Unit Price (US$)

1

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L7987L

Package

HTSSOP16

Packing Type

Tube

Unit Price (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 1936 1 Order Now
MOUSER WORLDWIDE 844 1 Order Now
Farnell Element14 EUROPE 1415 1 Order Now

代理商库存报告日期: 2019-06-17

代理商名称

DIGIKEY

库存

1936

Min.Order

1

地区

WORLDWIDE Order Now

MOUSER

库存

844

Min.Order

1

地区

WORLDWIDE Order Now

Farnell Element14

库存

1415

Min.Order

1

地区

EUROPE Order Now

代理商库存报告日期: 2019-06-17

Marketing Status

Active

Unit Price (US$)

1

Quantity

1000

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

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评估工具

    • 型号

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

00 Files selected for download

技术文档

    • Description 版本 文档大小 Action
      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

HW Model, CAD Libraries & SVD

    • Description 版本 文档大小 Action
      L7987L Pspice model 1.0
      89.79 KB
      ZIP

      L7987L Pspice model

出版刊物和宣传资料

    • Description 版本 文档大小 Action
      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

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L7987L
Active
HTSSOP16 工业 Ecopack2
L7987LTR
Active
HTSSOP16 工业 Ecopack2

L7987L

Package:

HTSSOP16

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP16

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7987LTR

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.