LM2677T-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677T-12 is a SIMPLE SWITCHER® step-down voltage regulator from Texas Instruments, designed for high-efficiency power conversion. It operates with an input voltage range of 8 V to 40 V and provides a fixed 12 V output at up to 5 A. The device integrates a 0.5 Ω N-channel MOSFET switch and operates at a fixed switching frequency of 260 kHz. It features thermal shutdown and current limit protection, housed in a TO-220-7 package suitable for through-hole mounting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a low-on-resistance N-channel MOSFET switch for high efficiency
• Includes built-in thermal shutdown and cycle-by-cycle current limiting
• Operates at a fixed 260 kHz switching frequency to minimize external component size

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• High-current distribution systems
• Battery-powered systems requiring efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'T' indicates the TO-220-7 through-hole package variant, distinct from the 'S' surface-mount version. Confirm the '-12' designation corresponds to the fixed 12 V output. Ensure compatibility with the SIMPLE SWITCHER family design guidelines for inductor selection and thermal management during integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 12 V output at 5 A is required from an 8–40 V input source. The TO-220-7 package is appropriate for applications prioritizing thermal dissipation via board mounting over space constraints. Compare against the LM2676 series if lower current (3 A) or different packaging is sufficient.

Voltage Regulators - DC DC Switching Regulators Part Context

Part of the LM2677 SIMPLE SWITCHER family, which offers a complete solution for buck conversion. The family includes variants with different output voltages and packages (TO-263 SMD vs. TO-220 THT). This specific model represents the through-hole, 12 V fixed-output option within the 5 A capability tier.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-12/NOPB: Surface-mount equivalent in TO-263 package. LM2676T-12/NOPB: Lower current (3 A) alternative in similar TO-220-7 package.