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STEVAL-ISA208V1

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38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR

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Product overview

Description

The L6983 is an easy-to-use synchronous monolithic step-down regulator capable of delivering up to 3 ADC to the load. Its wide input voltage range makes the device suitable for a broad range of applications. The device implements peak current mode architecture in a QFN16 3x3 package with internal compensation to minimize design complexity and size.

The L6983 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes efficiency at light-load with controlled output voltage ripple, which is ideal for battery-powered applications. LNM makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the specification for noise sensitive applications.

The L6983 allows switching frequency selection between 200 Hz and 2.2 MHz with optional spread spectrum for improved EMC. The EN pin provides enable/disable function. The typical shutdown current is 2 μA when disabled. When the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place. The device features power good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements effective constant current protection and thermal shutdown prevents thermal runaway.

  • All features

    • 3.5 V to 38 V operating input voltage
    • Output voltage from 0.85 V to VIN
    • 3.3 V and 5 V fixed output voltage versions
    • 3 A DC output current
    • 17 μA operating quiescent current
    • Internal compensation network
    • Two different versions:
      • LCM for high efficiency at light loads
      • LNM for noise sensitive applications
    • 2 μA shutdown current
    • Internal soft-start
    • Enable
    • Overvoltage protection
    • Thermal protection
    • Output voltage sequencing
    • QFN16 package
    • 200 kHz to 2.2 MHz programmable switching frequency; stable with low ESR capacitor
    • Optional spread spectrum for improved EMC
    • Power good
    • Synchronization to external clock for LNM devices
    Read more Read less

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Version
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SIMPLIS models (1)

Resource title
Version
Latest update
STEVAL-ISA208V1 SIMPLIS SCHEMATICS
2023.07 04 Mar 2025
04 Mar 2025
STEVAL-ISA208V1 SIMPLIS SCHEMATICS 2023.07

MCSDK Board Description (1)

Resource title
Version
Latest update
STEVAL-ISA208V1 GERBER
1.0 11 Nov 2019
11 Nov 2019
STEVAL-ISA208V1 GERBER 1.0

Bill of Materials (1)

Resource title
Version
Latest update
STEVAL-ISA208V1 BOM
1.0 11 Nov 2019
11 Nov 2019
STEVAL-ISA208V1 BOM 1.0

Schematic Pack (1)

Resource title
Version
Latest update
STEVAL-ISA208V1 SCHEMATIC
1.0 11 Nov 2019
11 Nov 2019
STEVAL-ISA208V1 SCHEMATIC 1.0

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Longevity Commitment Longevity Starting Date Material Declaration**
STEVAL-ISA208V1
Active
CARD Industrial Ecopack2 Yes - -

STEVAL-ISA208V1

Package:

CARD

Material Declaration**:

More Info

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors

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