ST Life.augmented


Up to 3 A step-down switching regulator (Vin = 5.5 V to 48 V) based on the ST1S14
  • active Active

The STEVAL-ISA104V1 is designed in order to evaluate the ST1S14, a step-down monolithic power switching regulator able to deliver up to 3 A; this high current level is also achieved thanks to a HSOP8 package with exposed frame.

The output voltage can be set from 1.22 V.

An internal oscillator fixes the switching frequency at 850 kHz.

Power Good open collector output validates the regulated output voltage as soon as it reaches the regulation.

Pulse-by-pulse current limit offers an effective constant current short-circuit protection while the current foldback decreases overstress in persistent short-circuit condition.

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Data Brief

Key Features

  • 3 A DC output current
  • Operating input voltage from 5.5 V to 48 V
  • 850 kHz internally fixed switching frequency
  • Internal soft-start
  • Internal current limiting
  • Inhibit for zero current consumption
  • 2 mA maximum quiescent current overtemperature range
  • Thermal shutdown
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1722: Up to 3 A step-down switching regulator (Vin = 5.5 V to 48 V) based on the ST1S14
1.0 244 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ISA104V1 gerber files
1.0 26 KB

Bill of Materials

Description Version Size
1.0 70 KB

Schematic Pack

Description Version Size
STEVAL-ISA104V1 schematics
1.0 46 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA104V1ActiveST1S14Buy Direct31.85Distributor reported inventory date: 2015-07-28
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA140

(*) 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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