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  • The L6984 is a step-down monolithic switching regulator able to deliver up to 400 mA DC. The output voltage adjustability ranges from 0.9 V. The fixed 3.3 V VOUT requires no external resistor divider. The “Low Consumption Mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency almost constant over the load current range, serving low noise application specification like car audio/sensors. The PGOOD open collector output can implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing on low-side power element implements an effective constant current protection.

    Key Features

    • 400 mA DC output current
    • 4.5 V to 36 V operating input voltage
    • Synchronous rectification
    • Low consumption mode or low noise mode
    • 75 μA IQ at light load (LCM VOUT = 3.3 V)
    • 13 μA IQ-SHTDWN
    • Adjustable fSW (250 kHz - 600 kHz)
    • Output voltage adjustable from 0.9 V
    • No resistor divider required for 3.3 V VOUT
    • VBIAS maximizes efficiency at light load
    • 350 mA valley current limit
    • Constant on-time control scheme
    • PGOOD open collector
    • Thermal shutdown

Recommended for you

Related Applications

Home, Building and City Automation

Metering

Evaluation Tools

    • Part Number

      High efficiency synchronous step-down regulator based on the L6984

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9982
      36 V, 400 mA synchronous step-down switching regulator
      6.0
      4 MB
      PDF
      DS9982

      36 V, 400 mA synchronous step-down switching regulator

    • Description Version Size Action
      TN1224
      Mounting instructions for SMD (surface mounting device) packages
      2.2
      1.06 MB
      PDF
      TN1224

      Mounting instructions for SMD (surface mounting device) packages

Publications and Collaterals

    • Description Version Size Action
      L6984, L6986 Energy saving synchronous DC-DC converters for industrial
      1.24 MB
      PDF

      L6984, L6986 Energy saving synchronous DC-DC converters for industrial

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF

      Electric vehicle (EV) ecosystem

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L6984ATR
Active
DFN10 3X3 Industrial Ecopack2
L6984TR
Active
VFDFPN 4X4X1.0 10L PITCH 0.50 Industrial Ecopack2

L6984ATR

Package:

DFN10 3X3

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DFN10 3X3

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L6984TR

Package:

VFDFPN 4X4X1.0 10L PITCH 0.50

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFDFPN 4X4X1.0 10L 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 Power

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
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L6984ATR Available at 1 distributors

Distributor availability ofL6984ATR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 570 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

COMPEL

Stock

570

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

Active
EAR99 NEC Tape And Reel DFN10 3X3 - - THAILAND 0.813 / 1k
L6984TR Available at 6 distributors

Distributor availability ofL6984TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 28 1 Order Now
COMPEL EUROPE 1 1 Order Now
ARROW EUROPE 4000 0 Order Now
Newark Element14 AMERICA 829 0 Order Now
MOUSER WORLDWIDE 10040 1 Order Now
Farnell Element14 EUROPE 4543 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

28

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

4000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

829

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

10040

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4543

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

Buy now
Active
EAR99 NEC Tape And Reel VFDFPN 4X4X1.0 10L PITCH 0.50 - - THAILAND 0.844 / 1k

L6984ATR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.813 / 1k

Distributor availability ofL6984ATR

Distributor Name
Region Stock Min. Order Third party link
COMPEL EUROPE 570 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

COMPEL

Stock

570

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN10 3X3

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.813 / 1k

Country of Origin

THAILAND

L6984TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.844 / 1k

Distributor availability ofL6984TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 28 1 Order Now
COMPEL EUROPE 1 1 Order Now
ARROW EUROPE 4000 0 Order Now
Newark Element14 AMERICA 829 0 Order Now
MOUSER WORLDWIDE 10040 1 Order Now
Farnell Element14 EUROPE 4543 1 Order Now

Distributor reported inventory date: 2020-08-14

Distributor Name

DIGIKEY

Stock

28

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

4000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

829

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

10040

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4543

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-14

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

VFDFPN 4X4X1.0 10L PITCH 0.50

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

0.844 / 1k

Country of Origin

THAILAND

(*) 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