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.

    主な特徴

    • 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

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L7987TR HTSSOP16 Tape And Reel
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1.25 1000 EAR99 - Check Availability

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L7987 HTSSOP16 Tube
Active
1.25 1000 EAR99 - Check Availability

Distributor availability ofL7987

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DIGIKEY WORLDWIDE 6096 1 Order Now
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Farnell Element14 EUROPE 589 1 Order Now
RUTRONIK EUROPE 1920 96 Order Now

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6096

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64

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MOUSER

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Farnell Element14

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L7987TR

パッケージ

HTSSOP16

Packing Type

Tape And Reel

Unit Price (US$)

1.25*

Distributor availability ofL7987TR

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 2500 1 Order Now
ARROW EUROPE 14858 0 Order Now
MOUSER WORLDWIDE 2500 1 Order Now

代理店レポートによる在庫データ: 2019-04-19

代理店名

DIGIKEY

在庫

2500

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

14858

Min.Order

0

地域

EUROPE Order Now

MOUSER

在庫

2500

Min.Order

1

地域

WORLDWIDE Order Now

代理店レポートによる在庫データ: 2019-04-19

Marketing Status

Active

Unit Price (US$)

1.25

数量

1000

ECCN (US)

EAR99

Country of Origin

-

L7987

パッケージ

HTSSOP16

Packing Type

Tube

Unit Price (US$)

1.25*

Distributor availability ofL7987

代理店名
地域 在庫 最小発注 Third party link
DIGIKEY WORLDWIDE 6096 1 Order Now
ARROW EUROPE 64 0 Order Now
Newark Element14 AMERICA 40 0 Order Now
MOUSER WORLDWIDE 15980 1 Order Now
Farnell Element14 EUROPE 589 1 Order Now
RUTRONIK EUROPE 1920 96 Order Now

代理店レポートによる在庫データ: 2019-04-19

代理店名

DIGIKEY

在庫

6096

Min.Order

1

地域

WORLDWIDE Order Now

ARROW

在庫

64

Min.Order

0

地域

EUROPE Order Now

Newark Element14

在庫

40

Min.Order

0

地域

AMERICA Order Now

MOUSER

在庫

15980

Min.Order

1

地域

WORLDWIDE Order Now

Farnell Element14

在庫

589

Min.Order

1

地域

EUROPE Order Now

RUTRONIK

在庫

1920

Min.Order

96

地域

EUROPE Order Now

代理店レポートによる在庫データ: 2019-04-19

Marketing Status

Active

Unit Price (US$)

1.25

数量

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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    • 製品型番

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

00 Files selected for download

技術文書

    • Description バージョン サイズ アクション
      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

HW Model, CAD Libraries & SVD

    • Description バージョン サイズ アクション
      L7987 Pspice model 1.0
      241.29 KB
      ZIP

      L7987 Pspice model

Publications and Collaterals

    • Description バージョン サイズ アクション
      DC-DC converters
      557.92 KB
      PDF

      DC-DC converters

    • Description バージョン サイズ アクション
      パワー・マネージメントガイド 2017 09.2017
      3.86 MB
      PDF
      Electric vehicle (EV) ecosystem 1.1
      1.03 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      パワー・マネージメントガイド 2017

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
L7987
Active
HTSSOP16 インダストリアル Ecopack2
L7987TR
Active
HTSSOP16 インダストリアル 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.

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コンバータ

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.