L7983

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60 V 300 mA synchronous step-down switching regulator with 10 µA quiescent current

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Product overview

Description

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 output voltage adjustability ranges from 0.85 V to VIN. The wide input voltage range and adjustable UVLO threshold meet the specification for the 12 V, 24 V and 48 V industrial bus standards.
The “Low Consumption Mode” (LCM) is designed for applications active during idle mode, so it maximizes the efficiency at light load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant overload current range, meeting the low noise application specification. The L7983 supports dynamic LCM to LNM transition.
The soft-start time is internally fixed and the output voltage supervisor manages the reset phase for any digital load (microcontroller, FPGA, etc.).
The internal compensation network features high noise immunity, simple design and saves on the component cost.
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 - heavy load, and the high switching frequency capability make the size of the application compact.
Pulse-by-pulse current sensing on both power elements implements an effective constant current protection.
  • All features

    • 3.5 V to 60 V operating input voltage
    • Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
    • 300 mA DC output current
    • Dynamic low consumption mode to low noise mode selection
    • 10 µA operating quiescent current (L7983PU33R, VIN > 24 V, LCM)
    • 2.3 µA shutdown current
    • 200 kHz to 2.2 MHz programmable switching frequency
    • Optional spread spectrum (dithering)
    • Internal soft-start
    • Enable / adjustable UVLO threshold
    • Synchronization to external clock
    • Internal compensation network
    • Internal current limiting
    • Overvoltage protection
    • Output voltage sequencing
    • Thermal shutdown

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Related Applications

Functions

Industrial

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STEVAL-L7983ADJ

      Active

      12 V/0.3 A step down DC/DC converter (VIN = 12 to 60 V) based on the L7983PUR regulator

      PSU and Converter Solution Eval Boards ST
      STEVAL-L7983ADJ

      Description:

      12 V/0.3 A step down DC/DC converter (VIN = 12 to 60 V) based on the L7983PUR regulator

      STEVAL-L7983V33

      Active

      3.3 V/0.3 A step down DC/DC converter (VIN = 3.5 V to 60 V) based on the L7983PU33R

      PSU and Converter Solution Eval Boards ST
      STEVAL-L7983V33

      Description:

      3.3 V/0.3 A step down DC/DC converter (VIN = 3.5 V to 60 V) based on the L7983PU33R

      STEVAL-L7983V50

      Active

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

      PSU and Converter Solution Eval Boards ST
      STEVAL-L7983V50

      Description:

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

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L7983

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L7983PU33R
Active
DFN 3X3X0.8 10L PITCH 0.5 Industrial Ecopack2
L7983PU50R
Active
DFN 3X3X0.8 10L PITCH 0.5 Industrial Ecopack2
L7983PUR
Active
DFN 3X3X0.8 10L PITCH 0.5 Industrial Ecopack2

L7983PU33R

Package:

DFN 3X3X0.8 10L PITCH 0.5

Material Declaration**:

Marketing Status

Active

Package

DFN 3X3X0.8 10L PITCH 0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7983PU50R

Package:

DFN 3X3X0.8 10L PITCH 0.5

Material Declaration**:

Marketing Status

Active

Package

DFN 3X3X0.8 10L PITCH 0.5

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L7983PUR

Package:

DFN 3X3X0.8 10L PITCH 0.5

Material Declaration**:

Marketing Status

Active

Package

DFN 3X3X0.8 10L PITCH 0.5

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
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
L7983PUR Available at 3 distributors

Distributor availability ofL7983PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2231 1 Order Now
Farnell Element14 EUROPE 600 1 Order Now
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-10

Distributor Name

DIGIKEY

Stock

2231

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

600

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-10

Active
EAR99 NEC Tape And Reel DFN 3X3X0.8 10L PITCH 0.5 - - CHINA 1.0 / 1k
L7983PU50R Available at 1 distributors

Distributor availability ofL7983PU50R

Distributor Name
Region Stock Min. Order Third party link
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-08

Distributor Name

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-08

Active
EAR99 NEC Tape And Reel DFN 3X3X0.8 10L PITCH 0.5 - - CHINA 1.0 / 1k
L7983PU33R Available at 4 distributors

Distributor availability ofL7983PU33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 993 1 Order Now
MOUSER WORLDWIDE 673 1 Order Now
Farnell Element14 EUROPE 550 1 Order Now
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-10

Distributor Name

DIGIKEY

Stock

993

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

673

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

550

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-10

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel DFN 3X3X0.8 10L PITCH 0.5 - - CHINA 1.0 / 1k

L7983PUR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL7983PUR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2231 1 Order Now
Farnell Element14 EUROPE 600 1 Order Now
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-10

Distributor Name

DIGIKEY

Stock

2231

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

600

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN 3X3X0.8 10L PITCH 0.5

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.0 / 1k

Country of Origin

CHINA

L7983PU50R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL7983PU50R

Distributor Name
Region Stock Min. Order Third party link
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-08

Distributor Name

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-08

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN 3X3X0.8 10L PITCH 0.5

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.0 / 1k

Country of Origin

CHINA

L7983PU33R

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.0 / 1k

Distributor availability ofL7983PU33R

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 993 1 Order Now
MOUSER WORLDWIDE 673 1 Order Now
Farnell Element14 EUROPE 550 1 Order Now
ANGLIA Live EUROPE 100 1 Order Now

Distributor reported inventory date: 2021-06-10

Distributor Name

DIGIKEY

Stock

993

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

673

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

550

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

100

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-06-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

DFN 3X3X0.8 10L PITCH 0.5

Operating Temperature (°C)

(min)

-

(max)

-

Budgetary Price (US$)* / Qty

1.0 / 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