LM2577T-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577T-12/NOPB is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, housed in a TO-220-5 through-hole package. It delivers a fixed 12 V output with a maximum switch current of 3 A. The device operates within an input voltage range of 4 V to 40 V and supports boost, flyback, and forward topologies. It functions at a switching frequency of 52 kHz and maintains operation across a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch eliminates the need for external components
• Fixed 12 V output option simplifies design for standard voltage rails
• Supports versatile converter topologies including boost, flyback, and forward configurations

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems requiring step-up conversion
• Battery-powered equipment needing voltage elevation
• General-purpose DC-to-DC conversion circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free compliance and RoHS adherence as per Texas Instruments standards. Confirm the TO-220-5 through-hole package matches your PCB footprint requirements. Ensure the fixed 12 V output aligns with your load specifications, as adjustable variants exist within the same family. Cross-reference the manufacturer part number against official TI databases to avoid counterfeit or obsolete stock.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output is required from an input source between 4 V and 40 V. The TO-220-5 package provides robust thermal performance for up to 3 A loads. Consider the 52 kHz switching frequency for inductor sizing. If higher efficiency or different voltage levels are needed, evaluate other SIMPLE SWITCHER series options.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the SIMPLE SWITCHER family, known for integrated power switches and minimal external component counts. The LM2577 series specifically targets step-up applications. The 'T' indicates a through-hole package, while '12' denotes the fixed 12 V output. This distinguishes it from adjustable versions like the LM2577-ADJ.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577T-12 (National Semiconductor equivalent)

Voltage Regulators - DC DC Switching Regulators FAQ

What topologies does the LM2577T-12/NOPB support?

It supports boost, flyback, and forward converter topologies.

Is the output voltage adjustable on this specific part?

No, the '12' suffix indicates a fixed 12 V output. Adjustable versions use the '-ADJ' suffix.