LM2677SD-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2677SD-ADJ/NOPB is a SIMPLE SWITCHER® high-efficiency 5A step-down voltage regulator from 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, enabling the use of compact external components. It supports a maximum output current of 5A and includes integrated features such as a 1A internal switch, current limit protection, thermal shutdown, and a power-good indicator. The regulator is housed in a VSON-14 package and functions within a temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated 1A internal power switch for simplified design
• Fixed 260kHz switching frequency reduces component size
• Built-in thermal shutdown and current limit protection
• Power-good status signal for system monitoring

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems with wide input voltage ranges
• Telecommunications infrastructure power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'SD' indicates the VSON-14 package variant distinct from other LM2677 packages. Confirm the 'ADJ' designation matches the required adjustable output configuration rather than fixed voltage options. Ensure the 'NOPB' suffix confirms lead-free and RoHS compliance status as per manufacturer specifications before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 5A output current capability is required with a wide input voltage range up to 40V. The adjustable output feature allows flexibility for various target voltages between 1.2V and 37V. Consider the VSON-14 package for space-constrained PCB layouts compared to larger TO-263 or TO-220 alternatives. Evaluate thermal management requirements given the 5A current capacity and operating temperature limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM267x family of SIMPLE SWITCHER regulators, which are designed for high-efficiency DC-DC conversion. The LM2677 specifically offers higher current handling (5A) compared to lower-current variants like the LM2670 (3A). The family is characterized by fixed-frequency operation and integrated protection features, simplifying the design of step-down power supplies for industrial and commercial applications.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2677S-ADJ/NOPB: Different TO-263-7 package; verify pinout compatibility. LM2677T-ADJ/NOPB: Different TO-220 package; verify thermal and mechanical fit. LM22677SD-ADJ/NOPB: Automotive grade variant; check qualification requirements.