3 A step-down switching regulator

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  • 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.

    Key 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

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L5987TR DFN8 3x3 Tape And Reel
Active
0.995 10000 EAR99 PHILIPPINES Check Availability

Distributor availability ofL5987TR

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ARROW EUROPE 8000 0 Order Now
MOUSER WORLDWIDE 3996 1 Order Now

Distributor reported inventory date: 2019-12-05

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ARROW

Stock

8000

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0

Region

EUROPE Order Now

MOUSER

Stock

3996

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1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-05

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L5987ATR PowerSO-8 Tape And Reel
Active
0.995 10000 EAR99 CHINA Check Availability

Distributor availability ofL5987ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1774 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
MOUSER WORLDWIDE 1769 1 Order Now
Farnell Element14 EUROPE 1273 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

1774

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

625

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1769

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1273

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-05

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L5987A PowerSO-8 Tube
Active
0.995 10000 EAR99 CHINA Check Availability

Distributor availability ofL5987A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1996 1 Order Now
MOUSER WORLDWIDE 1999 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

1996

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1999

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-05

Buy now

L5987TR

Package

DFN8 3x3

Packing Type

Tape And Reel

Unit Price (US$)

0.995*

Distributor availability ofL5987TR

Distributor Name
Region Stock Min. Order Third party link
ARROW EUROPE 8000 0 Order Now
MOUSER WORLDWIDE 3996 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

ARROW

Stock

8000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3996

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-05

Marketing Status

Active

Unit Price (US$)

0.995

Quantity

10000

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

L5987ATR

Package

PowerSO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.995*

Distributor availability ofL5987ATR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1774 1 Order Now
Newark Element14 AMERICA 625 0 Order Now
MOUSER WORLDWIDE 1769 1 Order Now
Farnell Element14 EUROPE 1273 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

1774

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

625

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1769

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1273

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-05

Marketing Status

Active

Unit Price (US$)

0.995

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

L5987A

Package

PowerSO-8

Packing Type

Tube

Unit Price (US$)

0.995*

Distributor availability ofL5987A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1996 1 Order Now
MOUSER WORLDWIDE 1999 1 Order Now

Distributor reported inventory date: 2019-12-05

Distributor Name

DIGIKEY

Stock

1996

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

1999

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-12-05

Marketing Status

Active

Unit Price (US$)

0.995

Quantity

10000

ECCN (US)

EAR99

Country of Origin

CHINA

(*) 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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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
DFN8 3x3 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:

DFN8 3x3

Material Declaration**:

Marketing Status

Active

Package

DFN8 3x3

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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Converter

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

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A This option is required and must be a number.

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