ST1S40

Active
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3 A DC step-down switching regulator

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Product overview

Description

The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. ST1S40 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 ST1S40 integrates a 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 ST1S40 is available in VFQFPN 4 mm x 4 mm 8 lead package, HSOP-8 and standard SO-8 package.
  • All features

    • 3 A DC 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 fold back short-circuit protection
    • VFQFPN4x4-8L, HSOP-8, and SO-8 and packages

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Output Power: 0

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All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-ISA084V1

      Active

      4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40

      DC-DC Converter --
      STEVAL-ISA084V1

      Description:

      4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40

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STMicroelectronics - ST1S40

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S40IDR
Active
SO-8 Industrial Ecopack2
ST1S40IPHR
Active
PowerSO-8 Industrial Ecopack2
ST1S40IPUR
Active
DFN8 4x4 Industrial Ecopack2

ST1S40IDR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S40IPHR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S40IPUR

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.

Sample & Buy

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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
ST1S40IPHR Available at 1 distributors

Distributor availability ofST1S40IPHR

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 302500 0 Buy from Distributor

Distributor reported inventory date: 2022-08-18

Distributor Name

FUTURE

Stock

302500

Min.Order

0

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-18

Active
EAR99 NEC Tape and Reel PowerSO-8 - - PHILIPPINES
ST1S40IDR Available at 4 distributors

Distributor availability ofST1S40IDR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 14770 1 Buy from Distributor
Newark Element14 AMERICA 980 0 Buy from Distributor
MOUSER WORLDWIDE 46 1 Buy from Distributor
Farnell Element14 EUROPE 63 1 Buy from Distributor

Distributor reported inventory date: 2022-08-18

Distributor Name

DIGIKEY

Stock

14770

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

980

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

46

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

63

Min.Order

1

Distributor reported inventory date: 2022-08-18

Active
EAR99 NEC Tape and Reel SO-8 - - CHINA
ST1S40IPUR No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel DFN8 4x4 - - MALAYSIA

ST1S40IPHR Active

Package:
PowerSO-8
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S40IPHR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

Distributor availability ofST1S40IPHR

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 302500 0 Buy from Distributor

Distributor reported inventory date: 2022-08-18

Distributor Name

FUTURE

Stock

302500

Min.Order

0

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2022-08-18

ST1S40IDR Active

Package:
SO-8
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S40IDR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

CHINA

Distributor availability ofST1S40IDR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 14770 1 Buy from Distributor
Newark Element14 AMERICA 980 0 Buy from Distributor
MOUSER WORLDWIDE 46 1 Buy from Distributor
Farnell Element14 EUROPE 63 1 Buy from Distributor

Distributor reported inventory date: 2022-08-18

Distributor Name

DIGIKEY

Stock

14770

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

980

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

46

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

63

Min.Order

1

Distributor reported inventory date: 2022-08-18

ST1S40IPUR Active

Package:
DFN8 4x4
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S40IPUR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

MALAYSIA

No availability of distributors reported, please contact our sales office
Swipe or click the button to explore more details Don't show this again

(*) 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