ST1S09

Active

Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulator

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  • The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.

    A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.
    Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. In addition, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the output current limited to prevent damages due to accidental short circuit. The ST1S09 is available in the DFN6 (3 x 3 mm) package.

    Key Features

    • Operating junction temp. -30 °C to 125 °C
    • Utilizes tiny capacitors and inductors
    • Available in DFN6 (3 x 3 mm) exposed pad
    • Non switching quiescent current: (typ) 1.5 mA over temperature range
    • Integrated output over-voltage protection
    • 1.5 MHz fixed frequency PWM with current control mode
    • Typical efficiency: > 90%
    • 2 A output current capability
    • Two versions available: power good or inhibit
    • RDSON (typ) 100 mΩ
    • 2 % DC output voltage tolerance

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STMicroelectronics - ST1S09

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST1S09IPUR
Active
DFN6 3x3 Industrial Ecopack2
ST1S09PUR
Active
DFN6 3x3 Industrial Ecopack2

ST1S09IPUR

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

ST1S09PUR

Package:

DFN6 3x3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN6 3x3

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
ST1S09IPUR Available at 6 distributors

Distributor availability ofST1S09IPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2436 1 Order Now
COMPEL EUROPE 161 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW AMERICA 538 1 Order Now
MOUSER WORLDWIDE 3117 1 Order Now
Farnell Element14 EUROPE 2808 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

2436

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

161

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

538

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

3117

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2808

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -30 125 PHILIPPINES 0.625 / 1k
ST1S09PUR Available at 3 distributors

Distributor availability ofST1S09PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1227 1 Order Now
MOUSER WORLDWIDE 3387 1 Order Now
Farnell Element14 EUROPE 2168 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

1227

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3387

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2168

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

Buy Direct
Active
EAR99 NEC Tape And Reel DFN6 3x3 -30 125 PHILIPPINES 0.713 / 1k

ST1S09IPUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.625 / 1k

Distributor availability ofST1S09IPUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2436 1 Order Now
COMPEL EUROPE 161 1 Order Now
FUTURE WORLDWIDE 3000 3000 Order Now
ARROW AMERICA 538 1 Order Now
MOUSER WORLDWIDE 3117 1 Order Now
Farnell Element14 EUROPE 2808 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

2436

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

161

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

3000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

538

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

3117

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2808

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-30

(max)

125

Budgetary Price (US$)* / Qty

0.625 / 1k

Country of Origin

PHILIPPINES

ST1S09PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.713 / 1k

Distributor availability ofST1S09PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1227 1 Order Now
MOUSER WORLDWIDE 3387 1 Order Now
Farnell Element14 EUROPE 2168 1 Order Now

Distributor reported inventory date: 2020-10-27

Distributor Name

DIGIKEY

Stock

1227

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3387

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2168

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-27

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN6 3x3

Operating Temperature (°C)

(min)

-30

(max)

125

Budgetary Price (US$)* / Qty

0.713 / 1k

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