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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