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

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  • 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.

    Key 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

Sample & Buy

Part Number
Core Product
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Board production status
Order from Distributors
Order from ST
STEVAL-ISA208V1 L6983CQTR
Active
- - EAR99 ITALY - No availability of distributors reported, please contact our sales office

STEVAL-ISA208V1

Core Product

L6983CQTR

Marketing Status

Active

Unit Price (US$)

*

Unit Price (US$)

-

Quantity

-

ECCN (US)

EAR99

Country of Origin

ITALY

Board production status

-

(*) 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

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Technical Documentation

    • Description Version Size Action
      DB4067
      38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR
      1.0
      3.15 MB
      PDF
      DB4067

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

Hardware Resources

    • Description Version Size Action
      STEVAL-ISA208V1 GERBER 1.0
      82.15 KB
      ZIP

      STEVAL-ISA208V1 GERBER

    • Description Version Size Action
      STEVAL-ISA208V1 BOM 1.0
      44.48 KB
      PDF

      STEVAL-ISA208V1 BOM

    • Description Version Size Action
      STEVAL-ISA208V1 SCHEMATIC 1.0
      390.1 KB
      PDF

      STEVAL-ISA208V1 SCHEMATIC

Publications and Collaterals

    • Description Version Size Action
      eDesignSuite-The smart way to design your application 1.0
      842.88 KB
      PDF

      eDesignSuite-The smart way to design your application

Legal

    • Description Version Size Action
      Evaluation products license agreement 1.6
      74.12 KB
      PDF

      Evaluation products license agreement

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

STEVAL-ISA208V1

Package:

CARD

Material Declaration**:

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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