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  • This demonstration board is based on the ST1S12 family of synchronous step-down DC-DC converters optimized for powering low-voltage digital cores in HDD (hard disk drive) applications and is generally used to replace high-current linear solutions when power dissipation may cause high heating of the application environment.

    It provides up to 0.7 A over an input voltage range of 2.5 V to 5.5 V. A high switching frequency of 1.7 MHz allows the use of tiny surface-mount components. For the adjustable version, a resistor divider to set the output voltage value, an inductor, and two capacitors are required. Only an inductor and 2 capacitors are needed for the 1.2 V and 1.8 V fixed version. A low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR surface-mount ceramic capacitors.
    The ST1S12 device is thermal protected and current limited to prevent damage due to accidental short-circuit. This family of products is available in the TSOT23-5L package.

    Key Features

    • RDS(on) typ. 250 m and 400 m
    • Not switching quiescent current: max 600 μA over temperature range
    • Uses tiny capacitors and inductors
    • Internal soft-start
    • Enable function
    • Step-down current mode PWM (1.7 MHz) DCDC converter
    • 0.7 A output current capability
    • Fixed output voltage of 1.2 V
    • Synchronous rectification
    • Typical efficiency: > 90%
    • 3% DC output voltage tolerance

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-ISA055V1
Active
CARD Industrial Ecopack2 -

STEVAL-ISA055V1

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

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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Core Product
Marketing Status
Supplier
ECCN (US)
ECCN (EU)
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Board production status
Budgetary Price (US$)*/Qty
STEVAL-ISA055V1 Available at 2 distributors

Distributor availability ofSTEVAL-ISA055V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5 1 Order Now
P&S ASIA/PACIFIC 1 1 Order Now

Distributor reported inventory date: 2020-12-02

Distributor Name

DIGIKEY

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

P&S

Stock

1

Min.Order

1

Region

ASIA/PACIFIC Order Now

Distributor reported inventory date: 2020-12-02

Buy Direct ST1S12GR
Active
- EAR99 NEC ITALY - 46.0 / 1

STEVAL-ISA055V1

Core Product

ST1S12GR

Marketing Status

Active

Budgetary Price (US$)*/Qty

46.0 / 1

Distributor availability ofSTEVAL-ISA055V1

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 5 1 Order Now
P&S ASIA/PACIFIC 1 1 Order Now

Distributor reported inventory date: 2020-12-02

Distributor Name

DIGIKEY

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

P&S

Stock

1

Min.Order

1

Region

ASIA/PACIFIC Order Now

Distributor reported inventory date: 2020-12-02

Supplier

-

ECCN (US)

EAR99

ECCN (EU)

NEC

Budgetary Price (US$)* / Qty

46.0 / 1

Country of Origin

ITALY

Board production status

-

(*) 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