ST1S41

Active

4 A step-down switching regulator

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Product overview

Description

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.
  • All 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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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

      DC-DC Converter --
      STEVAL-ISA108V1

      Description:

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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - ST1S41

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3D 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.

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.

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 No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape And Reel DFN8 4x4 - - MALAYSIA 0.8668 / 1k
ST1S41PHR Available at 3 distributors

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7500 1 Buy from Distributor
Farnell Element14 EUROPE 7 1 Buy from Distributor
ANGLIA Live EUROPE 200 2500 Buy from Distributor

Distributor reported inventory date: 2021-10-19

Distributor Name

DIGIKEY

Stock

7500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

7

Min.Order

1

ANGLIA Live

Stock

200

Min.Order

2500

Distributor reported inventory date: 2021-10-19

Active
EAR99 NEC Tape And Reel PowerSO-8 - - PHILIPPINES 0.8668 / 1k

ST1S41PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8668 / 1k

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN8 4x4

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.8668 / 1k

Country of Origin

MALAYSIA

ST1S41PHR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.8668 / 1k

Distributor availability ofST1S41PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7500 1 Buy from Distributor
Farnell Element14 EUROPE 7 1 Buy from Distributor
ANGLIA Live EUROPE 200 2500 Buy from Distributor

Distributor reported inventory date: 2021-10-19

Distributor Name

DIGIKEY

Stock

7500

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

7

Min.Order

1

ANGLIA Live

Stock

200

Min.Order

2500

Distributor reported inventory date: 2021-10-19

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.8668 / 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