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  • The ST1S41 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S41 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

    The ST1S41 integrates 95 mΩ high-side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.
    The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.
    The ST1S41 is available in VFQFPN 4 mm x 4 mm 8-lead package and HSOP-8.

    Key Features

    • 4 A output current
    • 4.0 V to 18 V input voltage
    • Output voltage adjustable from 0.8 V
    • 850 kHz switching frequency
    • Internal soft-start
    • Integrated 95 mΩ and 69 mΩ power MOSFETs
    • All ceramic capacitor
    • Enable
    • Cycle-by-cycle current limiting
    • Current foldback short-circuit protection
    • VFQFPN 4x4-8L and HSOP-8 packages

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Related Applications

Home, Building and City Automation

Industrial Power and Tools

Lighting and Controls

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All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-ISA108V1

      Active

      4 A, 850 kHz fixed-frequency PWM synchronous step-down demostration board based on the ST1S41 in a VFQFPN package

      PSU and Converter Solution Eval Boards --
      STEVAL-ISA108V1

      Description:

      4 A, 850 kHz fixed-frequency PWM synchronous step-down demostration board based on the ST1S41 in a VFQFPN package

CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S41PHR
Active
PowerSO-8 Industrial Ecopack2
ST1S41PUR
Active
DFN8 4x4 Industrial Ecopack2

ST1S41PHR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S41PUR

Package:

DFN8 4x4

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN8 4x4

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
ST1S41PUR Available at 3 distributors

Distributor availability ofST1S41PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3814 1 Order Now
MOUSER WORLDWIDE 3870 1 Order Now
Farnell Element14 EUROPE 3137 1 Order Now

Distributor reported inventory date: 2020-10-26

Distributor Name

DIGIKEY

Stock

3814

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3870

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3137

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-26

Buy Direct
Active
EAR99 NEC Tape And Reel DFN8 4x4 - - MALAYSIA 0.788 / 1k
ST1S41PHR Available at 4 distributors

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4258 1 Order Now
COMPEL EUROPE 1155 1 Order Now
ARROW EUROPE 12500 0 Order Now
MOUSER WORLDWIDE 4802 1 Order Now

Distributor reported inventory date: 2020-10-26

Distributor Name

DIGIKEY

Stock

4258

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1155

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

12500

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4802

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-26

Buy Direct
Active
EAR99 NEC Tape And Reel PowerSO-8 - - PHILIPPINES 0.788 / 1k

ST1S41PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.788 / 1k

Distributor availability ofST1S41PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 3814 1 Order Now
MOUSER WORLDWIDE 3870 1 Order Now
Farnell Element14 EUROPE 3137 1 Order Now

Distributor reported inventory date: 2020-10-26

Distributor Name

DIGIKEY

Stock

3814

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3870

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3137

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN8 4x4

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.788 / 1k

Country of Origin

MALAYSIA

ST1S41PHR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.788 / 1k

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4258 1 Order Now
COMPEL EUROPE 1155 1 Order Now
ARROW EUROPE 12500 0 Order Now
MOUSER WORLDWIDE 4802 1 Order Now

Distributor reported inventory date: 2020-10-26

Distributor Name

DIGIKEY

Stock

4258

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1155

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

12500

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

4802

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.788 / 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