LM2670SD-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2670SD-ADJ/NOPB is a step-down switching regulator from Texas Instruments, operating with an input voltage range of 4.5V to 40V. It delivers up to 1A output current and features an adjustable output voltage controlled by external resistors. The device integrates a 120mΩ internal switch and operates at a fixed frequency of 52kHz. Key electrical parameters include a typical quiescent current of 8mA and a shutdown current of 100µA. It supports output voltages from 1.23V to 37V.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-current power switch eliminates the need for external components in basic configurations.
• Fixed-frequency operation simplifies filter design and ensures predictable electromagnetic interference performance.
• Adjustable output voltage allows flexibility for various system requirements without changing core components.

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient voltage conversion
• General-purpose DC-DC conversion in industrial control units

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix NOPB indicates lead-free status and RoHS compliance per manufacturer specifications. Confirm the SD package type matches your PCB footprint requirements. Ensure the ADJ variant is selected when variable output voltage is needed rather than fixed versions. Cross-reference datasheet revision dates to confirm pinout consistency with existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Choose this component when input voltages exceed 40V or output currents surpass 1A limits of lower-tier regulators. Consider thermal management needs due to internal switch dissipation at high differential voltages. Evaluate inductor selection carefully as it directly impacts efficiency and ripple current. Verify that the 52kHz switching frequency aligns with EMI constraints of the target application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2670 family of simple switcher regulators designed for ease of use. It replaces linear regulators in applications where efficiency and heat dissipation are critical concerns. The family includes fixed voltage variants alongside the adjustable version presented here. Texas Instruments positions these devices for cost-sensitive designs requiring moderate power levels.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM2670SD-ADJ without the NOPB suffix if lead-free compliance is not mandatory. Other compatible parts within the same series offer fixed output voltages but lack adjustability. Check pin compatibility before swapping to ensure no PCB redesign is required. Verify thermal characteristics match if ambient temperatures differ significantly from standard conditions.