STEVAL-L7983V50

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Design Win

5.0 V / 0.3 A step down DC/DC converter (VIN = 5 to 60 V) based on the L7983PU50R regulator

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Product overview

Description

The STEVAL-L7983V50 step-down switching power supply evaluation board is based on the L7983PU50R regulator in an DFN10 3x3 mm package with 5 V set output voltage. The selected switching frequency is 1 MHz and it can be adjusted by applying an external clock on the LNM/LCM pin or by changing the frequency programming resistor.

The step-down monolithic switching regulator can 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 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 with active idle mode to maximize the efficiency at light load with controlled output voltage ripple, while LNM keeps the switching frequency constant over the load current range for low noise applications.

The soft start time is internally fixed and the output voltage supervisor manages the reset phase for any digital load (MCU, FPGA, etc.).

The internal compensation network features high noise immunity, simple design and component cost savings. The RST open collector output can also implement output voltage sequencing during the power-up phase.

The synchronous rectification, designed for high efficiency at medium to heavy loads, and the high switching frequency capability contribute to size reduction in final application designs. Pulse-by-pulse current sensing on both power elements implements effective constant current protection.

  • All features

    • 5 V to 60 V operating input voltage
    • Step-down (buck) conversion
    • 5 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)

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
STEVAL-L7983V50
Active
CARD Industrial Ecopack2 Yes

STEVAL-L7983V50

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Material Declaration**:

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Active

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CARD

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Industrial

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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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STEVAL-L7983V50

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L7983PU50R

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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors