2 A step-down switching demonstration board based on the L7985A in HSOP8 package

The STEVAL-ISA098V1 demonstration board is a step-down switching power supply based on the L7985A in HSOP8 package.

The L7985A is a step-down regulator with a 2.5 A (minimum) current limited embedded power MOSFET, so it is able to deliver up to 2 A current to the load depending on the application conditions.

The input voltage can range from 4.5 V to 38 V, while the output voltage can be set starting from 0.6 V to VIN.

Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.

Key Features

  • 2 A DC output current
  • From 4.5 V to 38 V range input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency programmable up to 1 MHz
  • Internal soft-start and enable
  • Low dropout operation: 100% duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • RoHS compliant

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Design

Technical Documentation

Product Specifications
Description Version Size
DB1621 DB1621: 2 A step-down switching demonstration board based on the L7985A in HSOP8 package 1.1 286 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA098V1 gerber files 1.0 94 KB
Bill of Materials
Description Version Size
STEVAL-ISA098V1 BOM 1.0 31 KB
Schematic Packs
Description Version Size
STEVAL-ISA098V1 schematics 1.0 24 KB

Legal

License Agreement
Description Version Size
Evaluation products license agreement 1.0 125 KB
Support & Community

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA098V1 L7985A Active 25.73 1 NEC EAR99 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
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(*) 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

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA098V1 ActiveCARDIndustrialEcopack2
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(**) 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.

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