LM3670MF-1.6

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-1.6 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 of 2.5 V to 5.5 V and provides a fixed output voltage of 1.6 V. The device features automatic PFM/PWM mode switching to optimize efficiency across varying load conditions. It utilizes voltage-mode control with pulse width modulation technology. The component is housed in a 5-pin SOT-23 package (LSSOP/TSOP5/6) and supports operation temperatures up to 85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automatic transition between Pulse Frequency Modulation and Pulse Width Modulation modes for enhanced efficiency
• Compact SOT-23-5 packaging suitable for space-constrained designs
• Voltage-mode control architecture for stable regulation

Voltage Regulators - DC DC Switching Regulators Applications

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

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and RoHS compliance status, as historical data indicates non-compliant variants exist alongside NOPB versions. Confirm the manufacturer source, noting that National Semiconductor documents may still appear in archives but Texas Instruments is the current producer. Ensure the fixed 1.6 V output variant matches the design requirement rather than adjustable or other fixed voltage options within the LM3670 family.

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 automatic mode switching makes it suitable for applications with variable load currents where efficiency is critical. Compare against the LM3674 if higher output current capability is needed, as the LM3670 series typically offers lower current ratings compared to the LM3674 family.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM3670 belongs to a family of miniature step-down converters intended for ultra-low voltage applications. It shares architectural similarities with the LM3671 and LM3674 series but differs in output current capabilities and switching frequencies. The MF-1.6 designation specifically denotes the fixed 1.6 V output version in the SOT-23-5 package, distinguishing it from adjustable variants like the LM3670MF-ADJ.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MF-1.6/NOPB is the lead-free and RoHS-compliant equivalent of the standard LM3670MF-1.6. For higher performance requirements, the LM3674MF-1.6 offers increased current capacity at a higher switching frequency.