LM3670MFX-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3670MFX-3.3/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, designed for ultra-low voltage applications. It operates within an input voltage range of 2.5 V to 5.5 V and provides a fixed 3.3 V output. The device supports up to 350 mA of load current with a switching frequency of 1 MHz. It utilizes a SOT-23-5 package and functions across a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates automatic PFM/PWM mode switching to optimize efficiency across varying load conditions.
• Features a compact SOT-23-5 footprint suitable for space-constrained portable designs.
• Operates with low quiescent current to extend battery life in standby modes.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient power management
• Battery-powered devices with strict size limitations
• Ultra-low voltage circuit power supplies

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' designation corresponds to the SOT-23-5 package variant. Ensure the fixed 3.3 V output aligns with system requirements, as other variants offer different voltages or adjustable outputs. Cross-reference datasheet revisions for any pinout or electrical characteristic updates.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3 V rail is required from a single-cell lithium-ion or similar battery source. Compare against the adjustable LM3670MF-ADJ/NOPB if flexible output voltage is needed. Consider the LM3671 series for higher current capabilities up to 600 mA. Evaluate thermal performance under maximum load conditions given the small package size.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM3670 family of miniature step-down converters. It shares architectural similarities with the LM3671 and LM3674 series but offers lower output current. The family targets applications where board space and efficiency are critical constraints.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3670MF-ADJ/NOPB: Offers adjustable output instead of fixed 3.3 V. LM3671MFX-3.3/NOPB: Provides higher 600 mA output current in a similar package. Verify compatibility with existing passive components due to potential frequency differences.