LM3670MFX-1.2/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MFX-1.2/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for space-constrained applications. It operates within an input voltage range of 2.5 V to 5.5 V and provides a fixed output voltage of 1.2 V with a maximum output current of 350 mA. The device integrates a 1 MHz switching frequency and features automatic PFM/PWM mode switching to optimize efficiency across varying load conditions. Packaged in a compact SOT-23-5 format, it supports operation temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates automatic power save mode switching between pulse frequency modulation and pulse width modulation to maintain high efficiency under light loads while ensuring stability at higher currents.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered consumer electronics
• Embedded systems requiring efficient voltage regulation
• Mobile communication devices

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per manufacturer documentation. Ensure the ordering part number matches the exact fixed output voltage variant required for the design. Cross-reference the package marking code against official datasheets to authenticate the component source and prevent counterfeit risks during acquisition.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.2 V rail is needed from a single-cell lithium-ion or similar supply source. The integrated switch eliminates external inductor selection complexity but limits output flexibility compared to adjustable variants. Consider thermal performance requirements given the small SOT-23-5 footprint and continuous current capabilities.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3670 family of mini SD DC-DC converters. It shares architectural similarities with other members like the LM3671 and LM3674, which offer different output voltages or current ratings. The family is characterized by high integration levels and small form factors suitable for modern portable electronic designs.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MF-1.2/NOPB serves as a direct equivalent with identical electrical specifications and pinout configuration. Verify that any substitute maintains the same fixed 1.2 V output and SOT-23-5 package dimensions to ensure mechanical compatibility.