LM3671TL-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM3671TL-3.3/NOPB is a fixed-output step-down DC-DC converter manufactured by Texas Instruments, featuring a 3.3V output and 600mA maximum load current capability. It operates within an input voltage range of 2.7V to 5.5V with a typical switching frequency of 2MHz. The device utilizes a DSBGA-5 package and supports an operating temperature range from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Intelligent automatic switching between Pulse Width Modulation (PWM) low-noise mode and Pulse Frequency Modulation (PFM) low-current mode to optimize efficiency across varying load conditions.
• Internal synchronous rectification ensures high energy conversion efficiency during PWM operation while minimizing external component requirements.
• Integrated protection mechanisms including internal soft-start, current overload protection, and thermal shutdown to ensure reliable system operation.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering low-voltage circuits in mobile phones and similar portable communication systems
• Supplying power for handheld devices such as personal digital assistants and MP3 players
• Battery-powered applications requiring efficient step-down conversion from single-cell lithium-ion sources

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'TL' against official Texas Instruments documentation to confirm the DSBGA-5 package variant, as generic LM3671 listings often default to SOT-23 packages. Ensure the 'NOPB' designation confirms lead-free compliance and RoHS standards prior to procurement. Cross-reference the exact part number with the manufacturer's latest datasheet to validate availability and pinout compatibility for your specific PCB layout requirements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact footprint is required due to its DSBGA-5 packaging compared to standard SOT-23 options. It is suitable for designs needing a fixed 3.3V rail with up to 600mA capacity directly from a 2.7V to 5.5V source. Consider the 2MHz switching frequency for smaller passive components, but verify thermal performance under full load conditions given the small package size.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM3671 family of high-efficiency step-down converters designed for portable electronics. It shares core topology and control features with other variants like the LM3671MF series but differs primarily in package type and fixed output voltage configuration. The family is optimized for battery-operated systems requiring minimal external components and high power density.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM3671MF-3.3/NOPB offers identical electrical specifications but uses an SOT-23-5 package instead of DSBGA-5, requiring footprint adaptation. LM3671MFX-3.3/NOPB provides the same functionality in a different SOT-23 variant. Verify pin-to-pin compatibility and thermal dissipation characteristics when substituting these package variations.