STMICROELECTRONICS L7983 STEP-DOWN SWITCHING REGULATOR

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 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 a controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant, meeting the low noise application specification.

Key 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

Additional 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 (LCM) to Low Noise Mode (LNM) 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 an external clock
  • Internal compensation network
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Thermal shutdown

Read more: STMICROELECTRONICS L7983 STEP-DOWN SWITCHING REGULATOR


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