LM3670MF-3.3

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MF-3.3 is a miniature step-down DC-DC converter manufactured by Texas Instruments, designed for ultra-low voltage circuits. It operates within an input voltage range of 2.5 V to 5.5 V and provides a fixed output voltage of 3.3 V. The device supports an output current of up to 350 mA and features a switching frequency of 1 MHz. It utilizes SOT-23-5 packaging and functions across a temperature range from -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Miniature step-down topology optimized for space-constrained applications
• Automatic PFM/PWM mode switching for efficiency optimization
• Voltage-mode control with pulse width modulation technique

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 against official Texas Instruments documentation to confirm the fixed 3.3 V output configuration. Ensure the package designation matches the required SOT-23-5 footprint. Confirm RoHS compliance status as indicated in the manufacturer's datasheet, noting that some variants may have different regulatory classifications. Cross-reference the part number with the latest revision history to ensure compatibility with current manufacturing standards.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V output is required from a 2.5 V to 5.5 V input source. It is suitable for designs prioritizing small form factor due to the SOT-23-5 package. Consider the 350 mA current limit and 1 MHz switching frequency for filter component selection. Verify thermal performance requirements within the specified operating temperature range before integration.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM3670 series comprises miniature step-down DC-DC converters intended for ultra-low voltage applications. This family includes various output voltage options and adjustable versions. The LM3670MF-3.3 represents the fixed 3.3 V variant within this lineup, sharing common architectural features such as automatic mode switching and voltage-mode control with other members of the series.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MF-ADJ/NOPB offers adjustable output instead of fixed 3.3 V. LM3671 series devices provide higher output current capabilities but differ in switching frequency and package options. Verify pinout and electrical specifications before substituting.