LM3676SD-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM3676SD-3.3/NOPB is a high-efficiency, synchronous step-down DC/DC converter from Texas Instruments. It delivers a fixed 3.3 V output with a maximum current of 1.5 A. The device operates over an input voltage range of 2.7 V to 6 V and features a switching frequency of 1.2 MHz. Key electrical parameters include a quiescent current of 40 µA in active mode and 1 µA in shutdown. It utilizes a 10-pin SON package and supports operation temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for enhanced efficiency
• Fixed 1.2 MHz switching frequency minimizes external component size
• Shutdown mode reduces supply current to 1 µA

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices
• Cellular phones and handheld instruments
• Personal digital assistants (PDAs)
• MP3 players and portable media devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free status and RoHS compliance. Confirm the package type matches the design requirements. Ensure the fixed 3.3 V output aligns with system load needs. Check thermal performance under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact solution is required for low-voltage applications. The fixed 3.3 V output eliminates the need for external feedback resistors. High switching frequency allows for small inductors and capacitors. Suitable for systems requiring efficient power management from single-cell lithium-ion batteries.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3676 family of synchronous buck converters. It is designed for space-constrained applications requiring high efficiency. The device integrates a high-side N-channel MOSFET and a low-side N-channel MOSFET. It offers a robust solution for converting higher battery voltages to lower logic levels.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer's portfolio. Verify that substitute parts maintain the 1.5 A output current capability. Ensure equivalent switching frequencies to preserve passive component designs.