STMicroelectronics

L7983 60 V 300 mA Synchronous Step-Down Regulator

STMicroelectronics' step-down monolithic switching regulator is able to deliver up to 300 mA DC

Image of STMicroelectronics L7983 60 V 300 mA Synchronous Step-Down RegulatorSTMicroelectronics' 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 12 V, 24 V, and 48 V industrial bus standards.

The low consumption mode (LCM) is designed for applications active during idle mode to maximize the efficiency at light load with a 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.

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
Applications
  • Designed for 12 V, 24 V, and 48 V buses
  • Battery-powered applications
  • Decentralized intelligent nodes
  • Failsafe system
  • Sensors and low noise applications (LNM)

L7983 Synchronous Step-Down Regulator

ImageManufacturer Part NumberDescriptionVoltage - Input (Min)Current - OutputAvailable QuantityPriceView Details
IC REG BUCK 3.3V 300MA 10DFNL7983PU33RIC REG BUCK 3.3V 300MA 10DFN3.5V300mA3097 - Immediate$3.33View Details
IC REG BUCK 5V 300MA 10DFNL7983PU50RIC REG BUCK 5V 300MA 10DFN3.5V300mA2082 - Immediate$3.15View Details
IC REG BUCK ADJ 300MA 10DFNL7983PURIC REG BUCK ADJ 300MA 10DFN3.5V300mA1125 - Immediate$3.15View Details

Evaluation Boards

ImageManufacturer Part NumberDescriptionCurrent - OutputRegulator TopologyAvailable QuantityPriceView Details
EVAL BOARD FOR L7983PU33RSTEVAL-L7983V33EVAL BOARD FOR L7983PU33R300mABuck4 - Immediate$27.50View Details
EVAL BOARD FOR L7983PU50RSTEVAL-L7983V50EVAL BOARD FOR L7983PU50R300mABuck1 - Immediate$27.50View Details
EVAL BOARD FOR L7983PURSTEVAL-L7983ADJEVAL BOARD FOR L7983PUR300mABuck2 - Immediate$27.50View Details
Published: 2021-01-13