LM3670MF-1.6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-1.6/NOPB is a miniature step-down DC-DC converter designed for ultra-low voltage circuits, manufactured by Texas Instruments. It operates with an input voltage range of 2.5 V to 5.5 V and provides a fixed output voltage of 1.6 V. The device delivers up to 350 mA of output current with a switching frequency of 1 MHz. It features automatic PFM/PWM mode switching to optimize efficiency across load conditions. The component is housed in a SOT-23-5 package and supports operation temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automatic transition between Pulse Frequency Modulation (PFM) and Pulse Width Modulation (PWM) modes for optimized efficiency under varying load conditions
• Compact SOT-23-5 package design suitable for space-constrained portable applications
• Integrated synchronous rectification for high efficiency in step-down conversion

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring low quiescent current
• Battery-powered devices operating within the specified input voltage range
• Ultra-low voltage circuit power management systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify RoHS compliance status as indicated by the NOPB suffix, which typically denotes lead-free and environmentally friendly materials. Confirm the specific revision level of the datasheet, as Texas Instruments may update documentation over time. Ensure the ordering part number matches the exact fixed output voltage variant required, as other suffixes indicate different output voltages or packages. Cross-reference the manufacturer's official channel for the most current lifecycle and availability information.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.6 V output is required from a single-cell lithium-ion or similar battery source. The 1 MHz switching frequency allows for smaller external inductors and capacitors compared to lower-frequency alternatives. Consider the thermal performance in the SOT-23-5 package if high ambient temperatures or continuous high loads are expected. Verify that the input voltage remains within the 2.5 V to 5.5 V operational window for stable regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3670 family of miniature step-down converters from Texas Instruments. It shares architectural similarities with other members like the LM3670MF-ADJ but differs in its fixed output configuration. The family is characterized by low quiescent current and small footprint, targeting mobile and handheld applications where power efficiency and board space are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include other LM3670 variants with different fixed output voltages, such as LM3670MF-1.8/NOPB or LM3670MF-1.2/NOPB, provided the system voltage requirements align. For adjustable output needs, the LM3670MF-ADJ/NOPB serves as a functional alternative within the same package and electrical family.