L5987

Active

3 A step-down switching regulator

Download datasheet Order Direct
Overview
Online design
Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
Partner products
Sales Briefcase

Product overview

Description

The L5987 is a step-down switching regulator with a 3.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver an up to 3 A current to the load depending on the application conditions. The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN. Having a minimum input voltage of 2.9 V, the device is suitable also for a 3.3 V bus.
Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.
The VFQFPN8 and the HSOP packages with an exposed pad allow reducing the RthJAdown to 60 °C/W and 40 °C/W respectively.
  • All features

    • 3 A DC output current
    • 2.9 V to 18 V input voltage
    • Output voltage adjustable from 0.6 V
    • 250 kHz switching frequency, programmable up to 1 MHz
    • Internal soft-start and inhibit
    • Low dropout operation: 100% duty cycle
    • Voltage feedforward
    • Zero load current operation
    • Overcurrent and thermal protection
    • VFQFPN 3 x 3 -8L and HSOP8 package

Circuit Diagram

You might also like...

Recommended for you

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      EVAL5987A

      Active

      3 A step-down switching regulator demonstration board based on the L5987, L5987A

      PSU and Converter Solution Eval Boards --
      EVAL5987A

      Description:

      3 A step-down switching regulator demonstration board based on the L5987, L5987A

      STEVAL-ISA201V1

      Active

      3 A step-down switching regulator evaluation board based on the L5987

      DC-DC Converter ST
      STEVAL-ISA201V1

      Description:

      3 A step-down switching regulator evaluation board based on the L5987

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L5987

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5987A
Active
PowerSO-8 Industrial Ecopack2
L5987ATR
Active
PowerSO-8 Industrial Ecopack2
L5987TR
Active
QFN-8L P 0.5 mm Industrial Ecopack2

L5987A

Package:

PowerSO-8

Material Declaration**:

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5987ATR

Package:

PowerSO-8

Material Declaration**:

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L5987TR

Package:

QFN-8L P 0.5 mm

Material Declaration**:

Marketing Status

Active

Package

QFN-8L P 0.5 mm

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.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L5987TR Available at 2 distributors

Distributor availability ofL5987TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7844 1 Order Now
Farnell Element14 EUROPE 3854 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

7844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3854

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-31

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel QFN-8L P 0.5 mm -40 150 PHILIPPINES 1.0945 / 1k
L5987ATR Available at 3 distributors

Distributor availability ofL5987ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 76 1 Order Now
Newark Element14 AMERICA 85 0 Order Now
Farnell Element14 EUROPE 1058 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

76

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

85

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

1058

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-31

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel PowerSO-8 -40 150 PHILIPPINES 1.0945 / 1k
L5987A Available at 1 distributors

Distributor availability ofL5987A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3917 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

3917

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-07-31

Buy Direct
Active
EAR99 NEC Tube PowerSO-8 -40 150 PHILIPPINES 1.0945 / 1k

L5987TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0945 / 1k

Distributor availability ofL5987TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7844 1 Order Now
Farnell Element14 EUROPE 3854 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

7844

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3854

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-31

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN-8L P 0.5 mm

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.0945 / 1k

Country of Origin

PHILIPPINES

L5987ATR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0945 / 1k

Distributor availability ofL5987ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 76 1 Order Now
Newark Element14 AMERICA 85 0 Order Now
Farnell Element14 EUROPE 1058 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

76

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

85

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

1058

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-31

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.0945 / 1k

Country of Origin

PHILIPPINES

L5987A

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0945 / 1k

Distributor availability ofL5987A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3917 1 Order Now

Distributor reported inventory date: 2021-07-31

Distributor Name

DIGIKEY

Stock

3917

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-07-31

ECCN (EU)

NEC

Packing Type

Tube

Package

PowerSO-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.0945 / 1k

Country of Origin

PHILIPPINES

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