STEVAL-ISA090V1:3.5 A step down switching regulator (Vin=8 to 55 V) based on L4973

The STEVAL-ISA090V1 demonstration board provides a platform for evaluation of the L4973, a 3.5 A step-down monolithic power switching regulator operating in continuous mode.

Based on the selection of the external components, the device can operate in the entire input voltage range of 8 V < VIN< 55 V. The output voltage is limited by the voltage rating of the output capacitor, so it can be adjusted within the 3.3 V < VOUT< 30 V range through voltage divider R3, R4. The input and output capacitors are capable of sustaining the RMS current within the operating range.

Key Features

  • Input voltage range: 8 V to 55 V
  • Output voltage: 5.1 V ± 3% (line, load and thermal)
  • Output ripple: 51 mV
  • Output current range: 1 mA to 3.5 A
  • Max output ripple current: 30%
  • Current limit: 4.5 A
  • Switching frequency: 150 kHz
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DB1266: 3.5 A step-down switching regulator based on the L49731.1177 KB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISA090V1 gerber files2.199 KB
Bill of Materials
DescriptionVersionSize
BOM for STEVAL-ISA090V1 board1.011 KB
Schematic Packs
DescriptionVersionSize
Board schematics for STEVAL-ISA090V1 board1.056 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-ISA090V1L4973511NECEAR99ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISA090V1CARDIndustrialEcopack2
3.5 A step-down switching regulator based on the L4973 STEVAL-ISA090V1
3.5 A step-down switching regulator based on the L4973 STEVAL-ISA090V1
3.5 A step-down switching regulator based on the L4973 STEVAL-ISA090V1
3.5 A step-down switching regulator based on the L4973 STEVAL-ISA090V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2