LM2577S-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577S-12/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 4 V to 40 V and provides a fixed output of 12 V at up to 3 A. The device integrates a 52 kHz oscillator, current limit protection, and thermal shutdown. Packaged in TO-263-5 (DPAK), it supports boost, flyback, and forward topologies. Operating temperature ranges from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a fixed-frequency internal oscillator for simplified design
• Includes built-in current limit and thermal shutdown protection
• Supports multiple converter topologies including boost and flyback

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage step-up
• Industrial control power supplies
• General-purpose DC-DC conversion modules

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the component matches the exact LM2577S-12/NOPB designation to ensure correct 12 V fixed output and 3 A rating. Confirm the TO-263-5 package type and NOPB lead-free status. Check datasheet revisions for any updates to electrical characteristics or recommended external components before integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a fixed 12 V output is required from an input source between 4 V and 40 V. It is suitable for applications needing up to 3 A load current with moderate switching frequency. Consider the TO-263-5 package for surface-mount assembly with adequate thermal dissipation capabilities compared to smaller packages.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2577 series of SIMPLE SWITCHER regulators. It complements other variants like the adjustable LM2577SX-ADJ/NOPB and different fixed voltages within the same family. The series is known for reducing external component count while maintaining high efficiency in step-up configurations.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577S-12/NOPB is the direct equivalent of LM2577S-12. Cross-reference with LM2577T-12 for through-hole TO-220-5 compatibility if pinout and thermal requirements allow.