LM21305SQE/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM21305SQE/NOPB is a synchronous buck regulator from Texas Instruments, designed for high-efficiency power conversion. It integrates a 5A switch and supports adjustable switching frequencies with synchronization capability. The device operates within an input voltage range of 4.5V to 60V and provides an adjustable output voltage. Key electrical parameters include a maximum switching frequency of 2.2MHz and a quiescent current of 180µA during active operation. It features thermal shutdown and overcurrent protection, housed in a thermally enhanced WQFN-30 package suitable for space-constrained applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 5A synchronous switch for efficient step-down conversion
• Supports adjustable switching frequency up to 2.2MHz with external synchronization
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Telecommunications infrastructure power supplies
• Enterprise systems and servers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the suffix NOPB to ensure lead-free compliance and specific tape-and-reel packaging configuration. Confirm the operating temperature range matches your environmental requirements. Cross-reference the datasheet revision date to ensure compatibility with your design specifications. Ensure the ordering quantity aligns with the manufacturer's standard reel sizes to avoid cut-tape premiums if not intended.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust, high-current synchronous buck solution is required for inputs up to 60V. The integrated 5A switch reduces external component count compared to discrete solutions. Consider the thermal performance of the WQFN package and ensure adequate PCB copper area for heat dissipation. Verify that the desired switching frequency falls within the adjustable range to optimize efficiency and filter size.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM213xx family of high-voltage synchronous buck regulators. It is engineered for applications requiring high efficiency and compact footprint. The family typically shares similar control architectures but varies in current rating and package options. This specific model targets mid-power applications where reliability and thermal management are critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct pin-to-pin replacements may include other models within the LM213xx series with different current ratings, such as the LM21300 or LM21310, provided the electrical specifications meet the system requirements. Always verify pinout compatibility and thermal characteristics before substitution.