ST1S09

Active
Design Win

2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

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Product overview

Description

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.
  • All 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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All tools & software

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      2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit

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      STEVAL-ISA046V2

      Description:

      2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit

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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.

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
ST1S09IPUR Available at 1 distributors

Distributor availability ofST1S09IPUR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 8 1 Buy from Distributor

Distributor reported inventory date: 2022-07-26

Distributor Name

COMPEL

Stock

8

Min.Order

1

Distributor reported inventory date: 2022-07-26

Active
EAR99 NEC Tape and Reel DFN6 3x3 -30 125 PHILIPPINES
ST1S09PUR Available at 2 distributors

Distributor availability ofST1S09PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5 1 Buy from Distributor
COMPEL EUROPE 1 1 Buy from Distributor

Distributor reported inventory date: 2022-08-01

Distributor Name

DIGIKEY

Stock

5

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

1

Min.Order

1

Distributor reported inventory date: 2022-08-01

Active
EAR99 NEC Tape and Reel DFN6 3x3 -30 125 PHILIPPINES

ST1S09IPUR Active

Package:
DFN6 3x3
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S09IPUR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-30

Max:

125

Country of Origin:

PHILIPPINES

Distributor availability ofST1S09IPUR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 8 1 Buy from Distributor

Distributor reported inventory date: 2022-07-26

Distributor Name

COMPEL

Stock

8

Min.Order

1

Distributor reported inventory date: 2022-07-26

ST1S09PUR Active

Package:
DFN6 3x3
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

ST1S09PUR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-30

Max:

125

Country of Origin:

PHILIPPINES

Distributor availability ofST1S09PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5 1 Buy from Distributor
COMPEL EUROPE 1 1 Buy from Distributor

Distributor reported inventory date: 2022-08-01

Distributor Name

DIGIKEY

Stock

5

Min.Order

1

Region

WORLDWIDE Buy from Distributor

COMPEL

Stock

1

Min.Order

1

Distributor reported inventory date: 2022-08-01

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