LM3218SEX/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3218SEX/NOPB is a miniature, adjustable step-down DC-DC converter manufactured by Texas Instruments. It integrates a 650 mA power switch and operates from an input voltage range of 2.7 V to 5.5 V. The device supports output voltages down to 0.8 V with high accuracy. Key electrical characteristics include a switching frequency of 2 MHz, low quiescent current for efficiency, and integrated protection against over-current, over-voltage, and thermal overload. It is housed in an 8-pin SMD module package suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 650 mA power switch for compact solution size
• Supports adjustable output voltage starting from 0.8 V
• Includes comprehensive protection features such as over-current, over-voltage, and thermal shutdown
• Operates with low quiescent current to maintain efficiency across load conditions

Voltage Regulators - DC DC Switching Regulators Applications

• RF power amplifier biasing supplies
• Portable battery-powered devices requiring efficient voltage regulation
• Embedded systems with strict space limitations
• Industrial control modules needing stable low-voltage rails

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the suffix /NOPB to ensure lead-free compliance and specific packaging configuration. Confirm the 8-pin SMD module package type matches your PCB footprint requirements. Check the latest datasheet for any updates regarding operating temperature ranges or recommended external component values for stability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a small form factor buck converter is required with moderate current capability up to 650 mA. It is suitable for applications where input voltage is between 2.7 V and 5.5 V and output adjustment flexibility is needed. Consider the 2 MHz switching frequency for smaller passive components compared to lower-frequency alternatives.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3218 family of miniature DC-DC converters designed by Texas Instruments. It is specifically engineered for RF power amplifier applications and other portable electronics where size and efficiency are critical. The series offers a balance of performance and integration, reducing the bill of materials by combining the controller and power switch into a single package.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes may include other LM3218 variants with different package options such as LM3218SE or LM3218SEE/NOPB. Ensure compatibility with the 8-pin SMD footprint if physical replacement is required. Verify that alternative parts support the same 650 mA output current and 2.7 V to 5.5 V input range.