LM3670MFX-1.5/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MFX-1.5/NOPB is a miniature step-down DC-DC converter manufactured by Texas Instruments, designed for ultra-low voltage circuits. It operates with an input voltage range from 2.5 V to 5.5 V and provides a fixed output of 1.5 V. The device delivers up to 350 mA of output current and features a switching frequency of 1 MHz. It functions within a temperature range of -40°C to +85°C and utilizes a SOT-23-5 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Miniature step-down DC-DC converter topology optimized for space-constrained designs
• Automatic PFM/PWM mode switching for efficiency optimization across load conditions
• Integrated shutdown capability for power management in portable applications

Voltage Regulators - DC DC Switching Regulators Applications

• Ultra-low voltage circuit power supplies
• Portable electronic devices requiring compact power regulation
• Battery-powered systems needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence as per manufacturer specifications. Confirm the 'MFX' suffix corresponds to the SOT-23-5 tape-and-reel packaging format. Ensure the fixed 1.5 V output variant matches the design requirement, distinguishing it from adjustable or other fixed voltage versions within the LM3670 family.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.5 V output is required from an input range of 2.5 V to 5.5 V. It is suitable for applications demanding a compact SOT-23-5 footprint and operation up to 350 mA. Consider the 1 MHz switching frequency for inductor size trade-offs. Verify thermal performance at maximum load within the specified operating temperature range.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3670 series of miniature step-down converters. It shares the core architecture with variants like LM3670MFX-ADJ/NOPB but provides a fixed 1.5 V output instead of an adjustable one. The series is characterized by low quiescent current and small external component count, targeting portable and battery-operated electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MFX-ADJ/NOPB offers adjustable output; verify if fixed 1.5 V is strictly required. LM3671MFX-1.5/NOPB provides higher current (600 mA) and different switching frequency (2.6 MHz); ensure pin compatibility and thermal requirements are met before substitution.