The LM3671 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current, over the entire input voltage range. There are several different fixed voltage output options available as well as an adjustable output voltage version range from 1.1 V to 3.3 V.
The device offers superior features and performance for mobile phones and similar portable systems. Automatic intelligent switching between PWM low-noise and PFM low-current mode offers improved system control. During PWM mode, the device operates at a fixed-frequency of 2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).
A high-switching frequency of 2 MHz (typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor, and two ceramic capacitors, are required.
For all available packages, see the orderable addendum at the end of the datasheet.| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM3671/-Q1 2-MHz, 600-mA Step-Down DC-DC Converter datasheet (Rev. S) | PDF | HTML | 12 May 2016 |
| Application note | Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) | PDF | HTML | 23 May 2022 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Technical article | When to select an integrated inductor DC/DC module over a linear regulator | PDF | HTML | 16 May 2016 | |
| Analog Design Journal | Analog Applications Journal 3Q 2015 | 24 Jul 2015 | ||
| Analog Design Journal | Transient-testing platforms and automation techniques for LDOs and buck regulato | 24 Jul 2015 | ||
| EVM User's guide | AN-1395 LM3671 Evaluation Board (Rev. F) | 30 Apr 2013 | ||
| Application note | Power Management Design for Applications Processors | 22 Mar 2007 |
For additional terms or required resources, click any title below to view the detail page where available.
The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)
The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)
The LM3671 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3671 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YZR) | 5 | Ultra Librarian |
| SOT-23 (DBV) | 5 | Ultra Librarian |
| USON (NKH) | 6 | Ultra Librarian |
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