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L7983 60 V 300 mA Synchronous Step-Down Regulator

Author: EIS Release Date: Jan 12, 2021

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)
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