L6983

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38 V 3A synchronous step-down converter with 17uA quiescent current

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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 Hz - 2.2 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 2.2 MHz programmable switching frequency. Stable with low ESR capacitor
    • Optional spread spectrum for improved EMC
    • Power Good
    • Synchronization to external clock for LNM devices
    • QFN16 package

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
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L6983C33QTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office
L6983CQTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office
L6983N33QTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office
L6983N50QTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office
L6983C50QTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office
L6983NQTR QFPN 3X3X0.80 16L PITCH 0.50 Tape And Reel
Active
1.5 1000 EAR99 - No availability of distributors reported, please contact our sales office

L6983C33QTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L6983CQTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L6983N33QTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L6983N50QTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L6983C50QTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

L6983NQTR

Package

QFPN 3X3X0.80 16L PITCH 0.50

Packing Type

Tape And Reel

Unit Price (US$)

1.5*

Marketing Status

Active

Unit Price (US$)

1.5

Quantity

1000

ECCN (US)

EAR99

Country of Origin

-

(*) 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
      DS13116
      38 V, 3 A synchronous step-down converter with 17 μA quiescent current
      1.0
      4.87 MB
      PDF
      DS13116

      38 V, 3 A synchronous step-down converter with 17 μA quiescent current

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

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.

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