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  • The L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6983 is based on a peak current mode architecture and is packaged in a QFN16 3x3 with internal compensation thus minimizing design complexity and size.

    The L6983 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple so the device is suitable for battery-powered applications. LNM makes the switching frequency constant and minimizes the output voltage ripple for light load operations, meeting the specification for low noise sensitive applications. The L6983 allows the switching frequency to be selected in the 200 kHz - 2.3 MHz range with optional spread spectrum for improved EMC.
    The EN pin provides enable/disable function. The typical shutdown current is 2 µA when disabled. As soon as the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place. The L6983 features Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal run-away.

    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 and LNM for noise sensitive applications
    • 2 μA shutdown current
    • Internal soft-start
    • Enable
    • Overvoltage protection
    • Output voltage sequencing
    • Thermal protection
    • 200 kHz to 2.3 MHz programmable switching frequency. Stable with low ESR capacitor
    • Optional spread spectrum for improved EMC
    • Power Good
    • Synchronization to external clock for LNM devices
    • QFN16 package

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-ISA208V1

      Active

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

      PSU and Converter Solution Eval Boards ST

      STEVAL-ISA209V1

      Active

      38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR

      PSU and Converter Solution Eval Boards ST
      STEVAL-ISA208V1

      Description:

      38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR
      STEVAL-ISA209V1

      Description:

      38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR

CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6983C33QTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2
L6983C50QTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2
L6983CQTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2
L6983N33QTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2
L6983N50QTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2
L6983NQTR
Active
QFPN 3X3X0.80 16L PITCH 0.50 Industrial Ecopack2

L6983C33QTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6983C50QTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6983CQTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6983N33QTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6983N50QTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6983NQTR

Package:

QFPN 3X3X0.80 16L PITCH 0.50

Material Declaration**:

Marketing Status

Active

Package

QFPN 3X3X0.80 16L PITCH 0.50

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.

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

Part Number
Order from Distributors
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ECCN (US)
ECCN (EU)
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Budgetary Price (US$)*/Qty
min
max
L6983C33QTR Available at 6 distributors

Distributor availability ofL6983C33QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 480 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

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DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

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1

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EUROPE Order Now

MOUSER

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480

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1

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Stock

400

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1

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Stock

25

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1

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RUTRONIK

Stock

10

Min.Order

3000

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Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k
L6983CQTR Available at 6 distributors

Distributor availability ofL6983CQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 952 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 3971 1 Order Now
Farnell Element14 EUROPE 134 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

952

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3971

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

134

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

25

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k
L6983N33QTR Available at 5 distributors

Distributor availability ofL6983N33QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 488 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

488

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

400

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k
L6983N50QTR Available at 5 distributors

Distributor availability ofL6983N50QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 475 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 435 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

475

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

435

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

400

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k
L6983C50QTR Available at 6 distributors

Distributor availability ofL6983C50QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 475 1 Order Now
Farnell Element14 EUROPE 334 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

475

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

334

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

25

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k
L6983NQTR Available at 6 distributors

Distributor availability ofL6983NQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 469 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 389 1 Order Now
Farnell Element14 EUROPE 378 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

469

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

389

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

378

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFPN 3X3X0.80 16L PITCH 0.50 - - CHINA 1.5 / 1k

L6983C33QTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983C33QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 480 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

480

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

400

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

25

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

L6983CQTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983CQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 952 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 3971 1 Order Now
Farnell Element14 EUROPE 134 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

952

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3971

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

134

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

25

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

L6983N33QTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983N33QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 488 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

488

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

400

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

L6983N50QTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983N50QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 475 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 435 1 Order Now
Farnell Element14 EUROPE 400 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

475

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

435

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

400

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

L6983C50QTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983C50QTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 500 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
MOUSER WORLDWIDE 475 1 Order Now
Farnell Element14 EUROPE 334 1 Order Now
ANGLIA Live EUROPE 25 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

500

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

MOUSER

Stock

475

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

334

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

25

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

L6983NQTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.5 / 1k

Distributor availability ofL6983NQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 469 1 Order Now
RS COMPONENTS EUROPE 500 1 Order Now
ARROW EUROPE 3000 0 Order Now
MOUSER WORLDWIDE 389 1 Order Now
Farnell Element14 EUROPE 378 1 Order Now
RUTRONIK EUROPE 10 3000 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

469

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

500

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

3000

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

389

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

378

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

10

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFPN 3X3X0.80 16L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.5 / 1k

Country of Origin

CHINA

(*) 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