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1 A adjustable Vout PWM synchronous step-up DC-DC converter demonstration board based on the ST8R00W

This demonstration board is based on the ST8R00W family of synchronous step-up DC-DC converters with current output cut-off function that provide up to 1 A over an input voltage range of 4 V to 6 V and an output voltage range of 6 V to 12 V.

The ST8R00W is the continuous mode version, that guarantees the lowest switching ripple when the device is used at light load conditions.

The high switching frequency (1.2 MHz) allows the use of tiny surface-mount components.

Along with the resistor divider to set the output voltage value, an inductor and two capacitors are required. A low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR surface-mounted ceramic capacitors.

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Data Brief

Key Features

  • Very low supply current: 500 μA (typ)
  • Output voltage adjustable from 6 V to 12 V
  • Output voltage accuracy: ±2%
  • Output current up to 1 A
  • Low ripple voltage: 5 mV (typ)
  • Synchronous rectification
  • High 90% efficiency: VO = 9 V (typ)
  • Few external components
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB0857: 1 A adjustable Vout PWM synchronous step-up DC-DC converter demonstration board based on the ST8R00W
1.1 159 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-ISA048V2 board
1.0 50 KB

Bill of Materials

Description Version Size
BOM for STEVAL-ISA048V2 board
1.0 45 KB

Schematic Pack

Description Version Size
Board schematics for STEVAL-ISA048V2 board
1.0 20 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA048V2NRNDST8R00WPUR-46Distributor reported inventory date: 2016-02-09
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA20

(*) 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
(**) The Material Declaration forms available on 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.
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