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  • The ST1S10 is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current. The device operates with an input supply range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V (VFB) to 0.85 * VIN_SW[VOUT= VFB * (1 + R1/R2)]. It operates either at a 900 kHz fixed frequency or can be synchronized to an external clock (from 400 kHz to 1.2 MHz). The high switching frequency allows the use of tiny SMD external components, while the integrated synchronous rectifier eliminates the need for a Schottky diode. The ST1S10 provides excellent transient response, and is fully protected against thermal overheating, switching overcurrent and output short-circuit.

    The ST1S10 is the ideal choice for point of load regulators or LDO pre-regulation.

    Key Features

    • Step-down current mode PWM regulator
    • Output voltage adjustable from 0.8 V
    • Input voltage from 2.5 V up to 18 V
    • 2% DC output voltage tolerance
    • Synchronous rectification
    • Inhibit function
    • Synchronizable switching frequency from 400 kHz up to 1.2 MHz
    • Internal soft start
    • Dynamic short-circuit protection
    • Typical efficiency: 90%
    • 3 A output current capability
    • Standby supply current: max. 6 μA over temperature range
    • Operative junction temp.: from -40 °C to 125 °C

Circuit Diagram

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    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-ISA044V5

      Active

      3 A synchronous 900 kHz step-down DC-DC converter with inhibit function based on the ST1S10 (Power SO-8)

      PSU and Converter Solution Eval Boards --

      STEVAL-ISA044V6

      Active

      3 A synchronous 900 kHz step-down DC-DC converter with inhibit function based on the ST1S10 (DFN)

      PSU and Converter Solution Eval Boards --
      STEVAL-ISA044V5

      Description:

      3 A synchronous 900 kHz step-down DC-DC converter with inhibit function based on the ST1S10 (Power SO-8)
      STEVAL-ISA044V6

      Description:

      3 A synchronous 900 kHz step-down DC-DC converter with inhibit function based on the ST1S10 (DFN)

CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S10PHR
Active
PowerSO-8 Industrial Ecopack2
ST1S10PUR
Active
DFN8 4x4 Industrial Ecopack2

ST1S10PHR

Package:

PowerSO-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

PowerSO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S10PUR

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
ST1S10PHR Available at 8 distributors

Distributor availability ofST1S10PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12107 1 Order Now
COMPEL EUROPE 7295 1 Order Now
RS COMPONENTS EUROPE 1745 5 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 2537 1 Order Now
Farnell Element14 EUROPE 3797 1 Order Now
ANGLIA Live EUROPE 7345 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

12107

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

7295

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1745

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

7500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

2537

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3797

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7345

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel PowerSO-8 -25 125 CHINA 0.693 / 1k
ST1S10PUR Available at 6 distributors

Distributor availability ofST1S10PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4244 1 Order Now
COMPEL EUROPE 18240 1 Order Now
RS COMPONENTS EUROPE 7200 5 Order Now
FUTURE WORLDWIDE 9447 1 Order Now
ARROW EUROPE 27000 0 Order Now
MOUSER WORLDWIDE 16932 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

4244

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

18240

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

7200

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

9447

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

27000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

16932

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN8 4x4 -25 125 MALAYSIA 0.693 / 1k

ST1S10PHR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.693 / 1k

Distributor availability ofST1S10PHR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 12107 1 Order Now
COMPEL EUROPE 7295 1 Order Now
RS COMPONENTS EUROPE 1745 5 Order Now
ARROW EUROPE 7500 0 Order Now
ARROW AMERICA 2500 2500 Order Now
MOUSER WORLDWIDE 2537 1 Order Now
Farnell Element14 EUROPE 3797 1 Order Now
ANGLIA Live EUROPE 7345 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

12107

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

7295

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

1745

Min.Order

5

Region

EUROPE Order Now

ARROW

Stock

7500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

2500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

2537

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3797

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7345

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

PowerSO-8

Operating Temperature (°C)

(min)

-25

(max)

125

Budgetary Price (US$)* / Qty

0.693 / 1k

Country of Origin

CHINA

ST1S10PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.693 / 1k

Distributor availability ofST1S10PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4244 1 Order Now
COMPEL EUROPE 18240 1 Order Now
RS COMPONENTS EUROPE 7200 5 Order Now
FUTURE WORLDWIDE 9447 1 Order Now
ARROW EUROPE 27000 0 Order Now
MOUSER WORLDWIDE 16932 1 Order Now

Distributor reported inventory date: 2020-10-23

Distributor Name

DIGIKEY

Stock

4244

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

18240

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

7200

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

9447

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

27000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

16932

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-10-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN8 4x4

Operating Temperature (°C)

(min)

-25

(max)

125

Budgetary Price (US$)* / Qty

0.693 / 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