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  • The L5981 is a step-down switching regulator with a 1.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 1 A DC current to the load depending on the application condition.

    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 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.

    Key Features

    • 1 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
    • VFQFPN8 3 mm x 3 mm package

Circuit Diagram

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STMicroelectronics - L5981

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L5981TR
Active
DFN8 3x3 Industrial Ecopack2

L5981TR

Package:

DFN8 3x3

Material Declaration**:

PDF XML

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.

eDesignSuite

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

V This option is required and must be a number.
A This option is required and must be a number.

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
L5981TR Available at 2 distributors

Distributor availability ofL5981TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3707 1 Order Now
MOUSER WORLDWIDE 3966 1 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

3707

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3966

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-28

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN8 3x3 -40 150 PHILIPPINES 0.918 / 1k

L5981TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.918 / 1k

Distributor availability ofL5981TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3707 1 Order Now
MOUSER WORLDWIDE 3966 1 Order Now

Distributor reported inventory date: 2020-10-28

Distributor Name

DIGIKEY

Stock

3707

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3966

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-28

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN8 3x3

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

0.918 / 1k

Country of Origin

PHILIPPINES

(*) 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