L7983PU50R

Voltage Regulators - DC DC Switching Regulators Overview

The L7983PU50R is a synchronous step-down switching regulator from STMicroelectronics, housed in a 10-WFDFN package. It delivers a fixed 5 V output with a maximum DC current of 300 mA. The device supports an input voltage range of 3.5 V to 60 V and features a programmable switching frequency between 200 kHz and 2.2 MHz. Key electrical parameters include a typical quiescent current of 10 µA in Low Consumption Mode (LCM) and a shutdown current of 2.3 µA. It incorporates internal soft-start, pulse-by-pulse current limiting, and dynamic mode transition capabilities.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports dynamic transition between Low Consumption Mode for light-load efficiency and Low Noise Mode for constant frequency operation.
• Integrates synchronous rectification to maintain high efficiency across medium to heavy load conditions.
• Includes an open-collector reset output to manage power-up sequencing for digital loads such as microcontrollers.
• Features an internal compensation network that simplifies design and reduces external component count.

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial bus standard systems requiring 12 V, 24 V, or 48 V input conversion
• Power supply stages for microcontrollers and FPGAs
• Point-of-load regulation in compact electronic designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix '50R' confirms the fixed 5 V output voltage variant. Confirm the 10-WFDFN package type matches the PCB footprint requirements. Ensure the operating temperature range of -40°C to 150°C junction temperature aligns with the thermal constraints of the target application environment before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 60 V is required alongside a moderate 300 mA output current. It is suitable for applications needing adjustable switching frequencies to optimize EMI or efficiency. Consider the dynamic mode switching if the system experiences significant idle periods or requires low noise during active operation.

Voltage Regulators - DC DC Switching Regulators Part Context

The L7983 series represents STMicroelectronics' high-voltage synchronous buck regulators designed for industrial and automotive environments. This family emphasizes robustness with integrated protections against overcurrent, overvoltage, and overheating. The L7983PU50R specifically addresses the need for reliable 5 V generation from higher voltage industrial buses.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate other L7983 variants or comparable ST buck converters based on pin compatibility and electrical specifications.