LM2577T-15/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577T-15/NOPB is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, designed for high-efficiency DC/DC conversion. It operates with an input voltage range of 4V to 40V and provides a fixed 15V output at up to 3A switch current. The device integrates a 52kHz switching frequency, supporting boost, flyback, and forward topologies. Packaged in TO-220-5 for through-hole mounting, it ensures stable performance across a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a power switch rated for 3A continuous operation within a single monolithic IC.
• Supports versatile circuit configurations including step-up, flyback, and forward converter topologies.
• Features internal frequency compensation to minimize external component count.
• Includes thermal shutdown and current limiting protection mechanisms.

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage boosting
• General-purpose DC/DC power supplies
• Industrial control power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'NOPB' indicates lead-free and RoHS compliance per Texas Instruments standards. Confirm the 'T' prefix specifies the TO-220-5 through-hole package variant. Ensure the '-15' designation matches the required 15V fixed output voltage. Cross-reference the manufacturer part number against official TI databases to confirm current production status and availability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 15V output is required from an input source between 4V and 40V. The TO-220-5 package is suitable for applications requiring robust thermal dissipation without active cooling. Consider the 3A switch current limit when sizing external inductors and diodes. This regulator is appropriate for designs prioritizing simplicity and low external component count over ultra-high efficiency or adjustable outputs.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2577 series of SIMPLE SWITCHER regulators, which are known for ease of design and high efficiency. The series includes adjustable and fixed voltage variants in various packages. The LM2577T-15/NOPB specifically targets applications needing a reliable 15V supply with moderate current capabilities in a through-hole format.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577SX-15/NOPB offers the same electrical specifications but in a surface-mount TO-263 package. LM2577-15 is the original National Semiconductor equivalent with identical functionality. Verify pinout compatibility and thermal requirements when substituting between package types.