ST1S40

Active

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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    • 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

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
Newark Element14 AMERICA 70 0 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

Newark Element14

Stock

70

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-05-14

Active
EAR99 NEC Tape And Reel PowerSO-8 - - PHILIPPINES 0.76 / 1k
ST1S40IDR Available at 3 distributors

Distributor availability ofST1S40IDR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1099 1 Order Now
MOUSER WORLDWIDE 245 1 Order Now
Farnell Element14 EUROPE 896 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1099

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

245

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

896

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO-8 - - CHINA 0.68 / 1k
ST1S40IPUR Available at 2 distributors

Distributor availability ofST1S40IPUR

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 4500 4500 Order Now
MOUSER WORLDWIDE 5850 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

FUTURE

Stock

4500

Min.Order

4500

Region

WORLDWIDE Order Now

MOUSER

Stock

5850

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN8 4x4 - - MALAYSIA 0.74 / 1k

ST1S40IPHR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.76 / 1k

Distributor availability ofST1S40IPHR

Distributor Name
Region Stock Min. Order Third party link
Newark Element14 AMERICA 70 0 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

Newark Element14

Stock

70

Min.Order

0

Region

AMERICA Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.76 / 1k

Country of Origin

PHILIPPINES

ST1S40IDR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.68 / 1k

Distributor availability ofST1S40IDR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1099 1 Order Now
MOUSER WORLDWIDE 245 1 Order Now
Farnell Element14 EUROPE 896 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1099

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

245

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

896

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-8

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.68 / 1k

Country of Origin

CHINA

ST1S40IPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.74 / 1k

Distributor availability ofST1S40IPUR

Distributor Name
Region Stock Min. Order Third party link
FUTURE WORLDWIDE 4500 4500 Order Now
MOUSER WORLDWIDE 5850 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

FUTURE

Stock

4500

Min.Order

4500

Region

WORLDWIDE Order Now

MOUSER

Stock

5850

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2021-05-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN8 4x4

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.74 / 1k

Country of Origin

MALAYSIA

(*) 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