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  • The STEVAL-ISA042V2 demonstration board is a step-down DC-DC converter optimized for powering the low-voltage digital core in HDD applications and, more generally, replacing the high-current linear solution when the power dissipation may cause excessive heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 16 V.

    A high switching frequency (1.5 MHz) allows the use of tiny surface-mounted components, as well as the use of a resistor divider to set the output voltage value. Only an inductor, a Schottky diode, and two capacitors are required. 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 thermal protected and current limited to prevent damage due to accidental short-circuits.
    It uses the ST1S03 device.
    The ST1S03 is available in a DFN6 (3x3mm) package.

    Key Features

    • Adjustable current-mode PWM step-down DC-DC converter
    • Output voltage, Vout : 3.3 V
    • Output current, Iout: 1.5 A
    • Internal compensation to eliminate additional components
    • Pulse skipping for Ioutlower than 15 mA, to maintain the regulation with light loads
    • RoHS compliant

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB1132
      1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03
      1.1
      89.36 KB
      PDF
      DB1132

      1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03

Presentations & Training Material

    • Description Version Size Action
      Evaluation board presentation 1.1
      431.99 KB
      PDF

      Evaluation board presentation

Hardware Resources

    • Description Version Size Action
      PCB layout 1.0
      31.98 KB
      ZIP

      PCB layout

    • Description Version Size Action
      Bill of materials 1.0
      45.38 KB
      PDF

      Bill of materials

    • Description Version Size Action
      Board schematic 1.0
      39.48 KB
      PDF

      Board schematic

Publications and Collaterals

    • Description Version Size Action
      eDesignSuite-The smart way to design your application 1.0
      842.88 KB
      PDF

      eDesignSuite-The smart way to design your application

Legal

    • Description Version Size Action
      Terms of use 1.7
      57.54 KB
      PDF

      Terms of use

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-ISA042V2
Active
CARD Industrial Ecopack2 -

STEVAL-ISA042V2

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

Part Number
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Core Product
Marketing Status
Supplier
ECCN (US)
ECCN (EU)
Country of Origin
Board production status
Budgetary Price (US$)*/Qty
STEVAL-ISA042V2 Available at 3 distributors

Distributor availability ofSTEVAL-ISA042V2

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 3 1 Order Now
P&S ASIA/PACIFIC 1 1 Order Now
MOUSER WORLDWIDE 5 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

RS COMPONENTS

Stock

3

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

1

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

Buy now ST1S03PUR
Active
- EAR99 NEC ITALY - 47.0 / 1

STEVAL-ISA042V2

Core Product

ST1S03PUR

Marketing Status

Active

Budgetary Price (US$)*/Qty

47.0 / 1

Distributor availability ofSTEVAL-ISA042V2

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 3 1 Order Now
P&S ASIA/PACIFIC 1 1 Order Now
MOUSER WORLDWIDE 5 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

RS COMPONENTS

Stock

3

Min.Order

1

Region

EUROPE Order Now

P&S

Stock

1

Min.Order

1

Region

ASIA/PACIFIC Order Now

MOUSER

Stock

5

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-10

Supplier

-

ECCN (US)

EAR99

ECCN (EU)

NEC

Budgetary Price (US$)* / Qty

47.0 / 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