LM2677T-ADJ

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677T-ADJ is a high-efficiency 5A step-down switching voltage regulator from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 8V to 40V and provides an adjustable output voltage between 1.2V and 37V. The device features a fixed switching frequency of 260kHz and supports up to 5A output current. It utilizes a TO-220-5 through-hole package and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 5A power switch for high-current step-down conversion
• Adjustable output voltage capability via external resistor network
• Fixed 260kHz switching frequency reduces required passive component size
• Built-in thermal shutdown and current limit protection

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation in industrial equipment
• Power supplies for embedded systems requiring 5A capacity
• Battery-powered applications needing efficient voltage stepping
• Telecommunications infrastructure power distribution

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'T' indicates the TO-220-5 through-hole package variant, distinct from surface-mount versions like 'S'. Confirm 'ADJ' specifies the adjustable output version rather than fixed voltage options. Ensure RoHS compliance matches project requirements. Cross-reference datasheet revision dates for updated electrical characteristics. Validate supplier authenticity to avoid counterfeit components affecting reliability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a robust 5A buck converter with through-hole mounting is required. The adjustable output allows flexibility for various rail voltages. Consider the 260kHz frequency for balancing efficiency and component size. Evaluate thermal management needs due to the TO-220 package's heat dissipation capabilities. Compare against LM2678 if higher current or different packaging is needed.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2677 series belongs to Texas Instruments' SIMPLE SWITCHER line, designed for simplified power supply design. It complements lower-current variants like the LM2676 (3A) and higher-performance models like the LM22677. The TO-220 package offers superior thermal performance compared to smaller surface-mount alternatives, making it suitable for high-power density applications where board space is less constrained than thermal constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677T-5.0/NOPB serves as a direct substitute if a fixed 5V output is acceptable instead of adjustable. LM2678T-ADJ is a compatible alternative offering similar functionality but may require minor layout adjustments due to pinout differences. Verify that any replacement maintains the 5A current rating and 40V maximum input voltage specification.