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 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 V_IN
• 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

more information: https://www.st.com/en/power-management/l7983.html

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