L6982N33DR

Voltage Regulators - DC DC Switching Regulators Overview

The L6982N33DR is a monolithic step-down switching regulator from STMicroelectronics, designed for high-efficiency power conversion in portable and battery-powered applications. It integrates a high-side N-channel MOSFET switch and operates with an input voltage range of 2.7V to 5.5V. The device provides a fixed 3.3V output with a maximum continuous load current of 1.5A. Key electrical characteristics include a typical quiescent current of 40µA in active mode and 1µA in shutdown mode. It features a fixed switching frequency of 1MHz, allowing for the use of small external components. The regulator includes comprehensive protection mechanisms such as overcurrent protection, thermal shutdown, and soft-start functionality.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-side N-channel power switch for compact solution design
• Offers ultra-low quiescent current to extend battery life in portable devices
• Includes built-in protection against overcurrent, thermal overload, and excessive input voltage
• Features a fixed 1MHz switching frequency to minimize passive component size

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics such as PDAs and mobile phones
• Battery-powered handheld instruments and medical devices
• Embedded systems requiring efficient 3.3V regulation from single-cell lithium batteries
• General-purpose low-voltage DC-DC conversion in industrial control modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'N33DR' confirms the fixed 3.3V output voltage and tape-and-reel packaging format. Ensure compatibility with your PCB footprint by checking the SOT-23-5 package dimensions against your layout. Confirm that the operating temperature range meets your application's environmental requirements. Cross-reference the datasheet revision date to ensure all latest electrical specifications and pinout definitions are applied during integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required from a single-cell lithium-ion or lithium-polymer battery source. It is suitable for designs prioritizing efficiency and board space over adjustable output flexibility. Consider the 1.5A current limit when sizing the inductor and ensuring thermal management for the intended load profile. Evaluate the need for external synchronization if noise immunity is critical in dense circuit layouts.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L6982 family of synchronous step-down regulators. It shares core architecture with variants offering different fixed output voltages or adjustable settings. The 'N33' designation specifically indicates the 3.3V fixed output version. The 'DR' suffix typically denotes the reel quantity and packaging type. This series is engineered for cost-sensitive, space-constrained applications where high efficiency at light loads is paramount.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other L6982 variants with compatible pinouts but different output voltages if system design allows modification. Verify that any alternative regulator maintains similar input voltage ranges and current capabilities. Check for pin-to-pin compatibility before replacing to avoid PCB redesign. Ensure thermal performance metrics align with existing heat dissipation strategies.