LM3676SD-1.8/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3676SD-1.8/NOPB is a synchronous step-down DC/DC converter manufactured by Texas Instruments, featuring an integrated high-side and low-side N-channel MOSFETs. It provides a fixed 1.8V output with a maximum continuous load current of 1.5A. The device operates from an input voltage range of 2.7V to 6V and supports switching frequencies of 1MHz or 2.2MHz. It utilizes Pulse Frequency Modulation (PFM) for light-load efficiency and includes comprehensive protection features such as overcurrent, thermal shutdown, and soft-start.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-efficiency synchronous rectification using internal N-channel power switches.
• Supports selectable switching frequencies of 1MHz or 2.2MHz to optimize external component size.
• Employs Pulse Frequency Modulation (PFM) control mode to maintain high efficiency at light loads.
• Includes built-in thermal shutdown and cycle-by-cycle current limiting for robust operation.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics powered by single-cell lithium-ion batteries
• Wireless communication modules requiring stable low-voltage rails
• Embedded systems with strict space constraints due to small package footprint

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status according to the manufacturer's latest documentation. Ensure the ordering part number matches the required switching frequency configuration if applicable via external components. Confirm the LLP-10 package dimensions align with your PCB layout requirements before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing circuits requiring a compact solution for 2.7V to 6V input ranges. It is suitable for applications needing up to 1.5A output current with high efficiency at light loads. Consider the 1MHz or 2.2MHz frequency options based on inductor size constraints and EMI requirements compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3676 family of synchronous buck converters designed for ultra-low voltage applications. It serves as a power management solution for battery-operated devices where space and efficiency are critical. The LLP-10 package allows for minimal board area usage while delivering reliable performance in portable electronic designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for pin-compatible alternatives within the same family. Verify that any replacement maintains the 1.5A current rating and compatible input voltage range. Ensure thermal characteristics and control loop stability match the original design requirements.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum output current capability of the LM3676SD-1.8/NOPB?

The device provides a maximum continuous output current of 1.5A.

Does the LM3676SD-1.8/NOPB support adjustable output voltage?

No, the '-1.8' suffix indicates a fixed 1.8V output voltage version.

What control technique does the LM3676 use for light-load conditions?

It uses Pulse Frequency Modulation (PFM) to improve efficiency when the load current is low.