LM2577N-12/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577N-12/NOPB is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, housed in a TO-220-5 through-hole package. It provides a fixed 12V output with a maximum switch current of 3A. The device operates within an input voltage range up to 40V and supports boost, flyback, and forward topologies. It features an internal oscillator with a switching frequency of 52kHz. The component is rated for operation between -40°C and +125°C junction temperature.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch capable of delivering 3A load current
• Fixed 12V output option eliminates external feedback resistor networks
• Internal compensation ensures stability with minimal external components
• Built-in thermal shutdown protects against overheating conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring isolated or non-isolated DC-DC conversion
• Battery-powered equipment needing voltage boosting from lower cell voltages
• General-purpose power supply designs utilizing standard through-hole mounting

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'N' confirms the TO-220-5 through-hole package variant rather than surface-mount options. Confirm the '-12' designation matches the required 12V fixed output specification. Ensure the 'NOPB' indicator aligns with lead-free and RoHS compliance requirements for your assembly process. Cross-reference the manufacturer part number directly with official Texas Instruments documentation to avoid counterfeit risks.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12V output is required with high current capability in a through-hole form factor. It is suitable for designs where board space allows for larger packages but requires robust thermal performance. Consider alternative LM2577 variants if surface-mount technology or adjustable output voltages are necessary for the application constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2577 series of SIMPLE SWITCHER regulators, which are designed for ease of use in step-up applications. The series includes various output voltage options and package types, such as the surface-mount SX variant. The LM2577N-12/NOPB specifically targets traditional PCB layouts using through-hole technology while maintaining the efficiency and simplicity of the broader family.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577T-12/NOPB (TO-220-5 Through-Hole)

Voltage Regulators - DC DC Switching Regulators FAQ

What switching frequency does the LM2577N-12/NOPB operate at?

The device utilizes an internal oscillator that switches at a nominal frequency of 52 kHz.

Does the LM2577N-12/NOPB support negative output configurations?

Yes, the LM2577 series can be configured for negative output voltages using appropriate external circuitry, despite the fixed positive 12V setting.