LM2670S-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2670S-3.3/NOPB is a SIMPLE SWITCHER high-efficiency 3A step-down voltage regulator from Texas Instruments. It operates with an input voltage range of 8V to 40V and provides a fixed 3.3V output at up to 3A. The device features a 260kHz switching frequency, enabling the use of compact external components. It includes internal frequency compensation for stability and incorporates thermal shutdown and current limit protection. The regulator is housed in a TO-263 (D2PAK) package and supports operation temperatures from -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for improved efficiency
• Fixed 3.3V output option eliminates external feedback resistors
• Internal frequency compensation simplifies design

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment power stages
• General-purpose 3.3V distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix /NOPB confirms lead-free and RoHS compliance per Texas Instruments standards. Confirm the 'S' designation corresponds to the TO-263 package variant. Ensure the '-3.3' indicates the fixed 3.3V output version rather than the adjustable model. Cross-reference the manufacturer part number against official TI databases to validate authenticity and revision status before procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V rail is required with up to 3A load capability. It is suitable for designs prioritizing board space reduction due to integrated synchronous rectification. Consider the 8V minimum input requirement; if lower input voltages are needed, an alternative topology or part may be necessary. Verify that the 260kHz switching frequency aligns with EMI constraints and inductor selection requirements.

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 LM2670 specifically offers 3A output current, distinguishing it from the higher-current LM2679 and lower-current variants. The family is characterized by integrated power switches and simplified external component counts.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2670S-3.3/NOPB is functionally equivalent to LM2670SD-3.3/NOPB regarding electrical performance, though package differences exist. Direct pin-to-pin replacements within the same series include other fixed-voltage variants like LM2670S-5.0/NOPB.