STMicroelectronics L7983 Synchronous Step-Down Switching Regulators

STMicroelectronics L7983 Synchronous Step-Down Switching Regulators deliver up to 300mA DC based on peak current mode architecture with output voltage adjustability ranging from 0.85V to VIN. These monolithic regulators offer a wide input voltage range and adjustable undervoltage lockout (UVLO) threshold to meet specifications for 12V, 24V, and 48V industrial bus standards. A soft-start time is internally fixed, and an output voltage supervisor manages the reset phase for digital loads (microcontroller, FPGA, etc.). The internal compensation network features high noise immunity, a simple design, and saves on the component cost. STMicroelectronics L7983 Synchronous Step-Down Switching Regulators operate in a -40°C to +150°C temperature range.

Features

  • Dynamic low consumption mode to a low noise mode selection
  • Optional spread spectrum (dithering)
  • Internal soft-start
  • Enable / adjustable UVLO threshold
  • Synchronization to the external clock
  • Internal compensation network
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Thermal shutdown

Applications

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

Specifications

  • 3.5V to 60V operating input voltage
  • Fixed output voltage (3.3V and 5V) or adjustable from 0.85V to VIN
  • 300mA DC output current
  • 10µA operating quiescent current (L7983PU33R, VIN > 24V, LCM)
  • 2.3µA shutdown current
  • 200kHz to 2.2MHz programmable switching frequency
  • Temperature ranges
    • -40°C to +150°C operating
    • -65°C to +150°C storage
  • 0.3A high-side/low-side RMS switch current

Content Stream

STMicroelectronics L7983 Synchronous Step-Down Switching Regulators

Videos

Application Circuit

Application Circuit Diagram - STMicroelectronics L7983 Synchronous Step-Down Switching Regulators

Block Diagram

Block Diagram - STMicroelectronics L7983 Synchronous Step-Down Switching Regulators
Publicado: 2020-11-02 | Actualizado: 2024-12-30