LM2577M-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577M-12 is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, providing a fixed 12V output with a maximum switch current of 3A. It operates within an input voltage range up to 40V and supports boost, buck-boost, and flyback topologies. The device integrates a 52kHz oscillator for efficient power conversion. Packaged in the TO-220-5 through-hole format, it is designed for robust thermal performance in industrial applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-current internal switching transistor rated for 3A continuous operation
• Includes built-in frequency compensation to minimize external component count
• Features a fixed 52kHz switching frequency for optimized passive component selection
• Incorporates thermal shutdown protection to safeguard against overheating

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial point-of-load regulation
• Battery-powered systems requiring voltage boosting
• DC-to-DC conversion for embedded controllers
• Power supplies for instrumentation equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'M' indicates the military-grade temperature range variant (-55°C to 125°C) compared to standard commercial grades. Confirm the package type matches the required TO-220-5 footprint. Check for lead-free compliance status as older revisions may differ. Ensure the fixed 12V output aligns with system requirements before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required from an input source between 4V and 40V. It is suitable for designs needing up to 3A load current with minimal external circuitry. Consider the TO-220-5 package for superior heat dissipation in high-power scenarios where surface-mount options are insufficient.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2577 series belongs to Texas Instruments' SIMPLE SWITCHER family, known for reducing design complexity. This specific model provides a regulated 12V output, distinguishing it from adjustable or other fixed-voltage variants like the 5V or 15V versions within the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577T-12 (Commercial grade, TO-220-5)

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage for the LM2577M-12?

The maximum input voltage is 40V.

Does the LM2577M-12 support buck topology?

Yes, it supports boost, buck-boost, and flyback topologies.