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)
