ST1S09

Active

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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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

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 No availability of distributors reported, please contact our sales office
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 1148 1 Order Now
MOUSER WORLDWIDE 3078 1 Order Now
Farnell Element14 EUROPE 2147 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1148

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3078

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2147

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

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

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 1148 1 Order Now
MOUSER WORLDWIDE 3078 1 Order Now
Farnell Element14 EUROPE 2147 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

1148

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

3078

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2147

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

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