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  • The STEVAL-L7983V33 product evaluation board is a step-down switching power supply based on the L7983PU33R regulator in a DFN10 3x3 mm package with fixed 3.3 V output voltage. The programmed switching frequency is 1 MHz and it can be adjusted by applying an external clock on LNM/LCM pin or by changing the frequency programming resistor.

    The L7983 device is a step-down monolithic switching regulator able to deliver up to 300 mA DC based on peak current mode architecture. The wide input voltage range and adjustable UVLO threshold meet the specification for the 12 V, 24 V and 48 V industrial bus standards.
    L7983 supports dynamic Low Consumption Mode (LCM) to Low Noise Mode (LNM) transition.
    LCM is designed for applications which remain active in idle mode to maximize the efficiency under light load condition with controlled output voltage ripple. LNM makes the switching frequency constant over load current range, meeting the low noise application specification.
    The soft start time is internally fixed and the output voltage supervisor manages the reset phase for any digital load (µC, FPGA, etc.).
    The internal compensation network features high noise immunity, simple design and component cost reduction. The RST open collector output can also implement output voltage sequencing during the power-up phase.
    Synchronous rectification, designed for high efficiency under medium to heavy load, and the high switching frequency capability reduce the application size. Pulse by pulse current sensing on both power elements implements an effective constant current protection.

    Key Features

    • 3.5 V to 60 V operating input voltage
    • Step-down (buck) conversion
    • 3.3 V output voltage
    • 300 mA DC max. output current
    • 1 MHz selected switching frequency
    • Dynamic Low Consumption Mode to Low Noise Mode selection
    • Internal soft-start
    • Synchronization to external clock
    • Internal compensation network
    • Auto recovery overcurrent, overvoltage and thermal protection
    • RoHS and China RoHS compliant
    • WEEE compliant (2012/19/UE RAEE II)

Recommended for you

Related Applications

Power Supplies and Converters

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-L7983V33
Active
CARD Industrial Ecopack2 Yes

STEVAL-L7983V33

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.

Sample & Buy

Part Number
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Order from ST
Core Product
Marketing Status
Supplier
ECCN (US)
ECCN (EU)
Country of Origin
Board production status
Budgetary Price (US$)*/Qty
STEVAL-L7983V33 Available at 2 distributors

Distributor availability ofSTEVAL-L7983V33

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
MOUSER WORLDWIDE 10 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Buy Direct L7983PU33R
Active
ST EAR99 NEC ITALY - 18.0 / 1

STEVAL-L7983V33

Core Product

L7983PU33R

Marketing Status

Active

Budgetary Price (US$)*/Qty

18.0 / 1

Distributor availability ofSTEVAL-L7983V33

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10 1 Order Now
MOUSER WORLDWIDE 10 1 Order Now

Distributor reported inventory date: 2020-11-23

Distributor Name

DIGIKEY

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

10

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-11-23

Supplier

ST

ECCN (US)

EAR99

ECCN (EU)

NEC

Budgetary Price (US$)* / Qty

18.0 / 1

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