2 A DC step-down switching regulator with 4 V/36 V input voltage range based on the L5973D

The STEVAL-ISA101V1 demonstration board is based on the L5973D, a step-down monolithic switching regulator with 2 A DC (2.5 A switch peak current) current capability over the output voltage range (1.235 V to 36 V).

The operating input voltage ranges from 4 V to 36 V. The device is based on BCD5 technology. The embedded power element is a P-channel D-MOS transistor so the driving stage does not require any bootstrap capacitor and the duty cycle can range up to 100%.

An internal oscillator fixes the switching frequency at 250 kHz. A synchronization pin is available when a higher switching frequency (up to 700 kHz) is required.

Pulse-by-pulse current protection and a frequency foldback feature always guarantee an effective short-circuit protection. Other features include voltage feed-forward, protection against feedback disconnection, inhibit and thermal shutdown.

Previous sales code: EVAL5973D.

Key Features

  • Vin: 4 V to 36 V
  • Vout: 1.235 V to 36 V
  • Output current: 2 A DC
  • Internal oscillator switching frequency: 250 kHz
  • Short-circuit protection
  • Inhibit and thermal shutdown
  • RoHS compliant

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Design

Technical Documentation

Product Specifications
Description Version Size
DB1663 DB1663: 2 A DC step-down switching regulator with 4 V/36 V input voltage range based on the L5973D 1.0 228 KB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA101V1 gerber files 1.0 47 KB
Bill of Materials
Description Version Size
STEVAL-ISA101V1 BOM 1.0 73 KB
Schematic Packs
Description Version Size
STEVAL-ISA101V1 schematics 1.0 28 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-ISA101V1 L5973D Active 40.43 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-ISA101V1 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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