4 A step-down switching regulator

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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

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
ST1S41PUR DFN8 4x4 Tape And Reel
Active
0.788 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofST1S41PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2077 1 Order Now
MOUSER WORLDWIDE 4508 1 Order Now
Farnell Element14 EUROPE 3279 1 Order Now

Distributor reported inventory date: 2019-12-09

Distributor Name

DIGIKEY

Stock

2077

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4508

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3279

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-09

Buy now
ST1S41PHR PowerSO-8 Tape And Reel
Active
0.788 10000 EAR99 PHILIPPINES Check Availability

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2399 1 Order Now
Newark Element14 AMERICA 525 0 Order Now
Farnell Element14 EUROPE 223 1 Order Now

Distributor reported inventory date: 2019-12-09

Distributor Name

DIGIKEY

Stock

2399

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

525

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

223

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-09

ST1S41PUR

Package

DFN8 4x4

Packing Type

Tape And Reel

Unit Price (US$)

0.788*

Distributor availability ofST1S41PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2077 1 Order Now
MOUSER WORLDWIDE 4508 1 Order Now
Farnell Element14 EUROPE 3279 1 Order Now

Distributor reported inventory date: 2019-12-09

Distributor Name

DIGIKEY

Stock

2077

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4508

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3279

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-09

Marketing Status

Active

Unit Price (US$)

0.788

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

ST1S41PHR

Package

PowerSO-8

Packing Type

Tape And Reel

Unit Price (US$)

0.788*

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2399 1 Order Now
Newark Element14 AMERICA 525 0 Order Now
Farnell Element14 EUROPE 223 1 Order Now

Distributor reported inventory date: 2019-12-09

Distributor Name

DIGIKEY

Stock

2399

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

525

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

223

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-09

Marketing Status

Active

Unit Price (US$)

0.788

Quantity

10000

ECCN (US)

EAR99

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

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Evaluation Tools

    • Part Number

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

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9248
      4 A step-down switching regulator
      2.0
      1.22 MB
      PDF
      DS9248

      4 A step-down switching regulator

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    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

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.

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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

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

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