L5983

Voltage Regulators - DC DC Switching Regulators Overview

The L5983 is a step-down switching regulator featuring an embedded 2.0 A (min.) current-limited Power MOSFET, delivering over 1.5 A DC output current. It accepts an input voltage range of 2.9 V to 18 V and provides an adjustable output voltage from 0.6 V to V_IN. The device includes an internal 250 kHz oscillator, externally programmable up to 1 MHz. Key electrical features include low dropout operation at 100% duty cycle, voltage feedforward, zero load current capability, and integrated soft-start and inhibit functions. Protection mechanisms encompass overcurrent and thermal shutdown. The component is housed in a compact 3 x 3 mm VFQFPN8 package with an exposed pad.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current Power MOSFET for efficient step-down conversion
• Supports wide input voltage ranges suitable for 3.3 V bus applications
• Offers flexible switching frequency adjustment for optimized design
• Includes comprehensive protection and control features for robust operation

Voltage Regulators - DC DC Switching Regulators Applications

• General purpose DC/DC conversion
• Battery-powered equipment power supplies
• Industrial and automotive systems requiring high reliability

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific ordering suffix to confirm packaging type, such as tape and reel or cut tape, as these affect handling but not function. Ensure the requested part number matches the exact manufacturer designation. Confirm compatibility with required PCB footprint dimensions for the 8-VFQFPN package. Check for any recent product change notices regarding assembly sites or materials. Validate that the component status remains active for long-term supply planning.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a single inductor solution is preferred for space-constrained designs. Consider the external frequency adjustment if synchronization or noise optimization is required. Evaluate the thermal performance based on the exposed pad soldering requirements to achieve the specified junction-to-ambient thermal resistance. Ensure the input voltage source can support the minimum operating voltage of 2.9 V.

Voltage Regulators - DC DC Switching Regulators Part Context

The L5983 belongs to STMicroelectronics' portfolio of monolithic buck converters and step-down switching regulators. This family targets applications demanding high reliability and performance in both industrial and automotive sectors. The device represents a solution for simplifying power management by integrating the power switch and control logic into a single compact package.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for verified alternatives within the same product family. Ensure any replacement maintains compatible pinout, thermal characteristics, and electrical specifications. Verify that substitute components meet the same automotive or industrial qualification standards if required by the application.